coolant temperature MITSUBISHI DIAMANTE 1900 Repair Manual

GENERALINFORMATIONAND MAINTENANCE l-21
IWSIZXJ FM. 83 A hose clamn that is taa tiaht can
Fig. 82 The cracks developing along this
hose are a result of age-related hardening caise older hoses td separate and ‘iear on
either side of the clamp
lCCS1221 Fig. 84 A soft spongy hose (identifiable by
1 the swollen section) will eventually burst
and should be replaced
IEMOVAL &,INSTALLATION '
1. Remove the radiator pressure cap. her of the sorina tension tvoe (which reouire oliers
3 squeeze the 6bs and loosenj or of the’screw ten-
ion type (which require screw or hex drivers to
oosen). Pull the clamps back on the hose away from
he connection. Never remove the pressure cap while the en-
gine is running, or personal injury from
scalding hot coolant or steam may result. If
possible, wait until the engine has cooled to
remove the pressure cap. If this is not possi-
ble, wrap a thick cloth around the pressure
cap and turn it slowly to the stop. Step back
while the pressure is released from the cool-
ing system. When you are sure all the pres-
sure has been released, use the cloth to turn
and remove the cao.
2. Position a clean container under the radiator
and/or engine draincock or plug, then open the drain
and allow the cooling system to drain to an appropri-
ate level. For some upper hoses, only a little coolant
must be drained. To remove hoses positioned lower
on the engine, such as a lower radiator hose, the en-
tire cooling system must be emptied.
When draining coolant, keep in mind that
cats and dogs are attracted by ethylene gly-
col antifreeze, and are quite likely to drink
any that is left in an uncovered container or
in puddles on the ground. This will prove fa-
tal in sufficient quantity. Always drain
coolant into a sealable container. Coolant
may be reused unless it is contaminated or
several years old. 9. Close the radiator or engine drains and prop-
erly refill the cooling system with the clean drained
engine coolant or a suitable mixture of ethylene gly-
cot coolant and water.
10. If available, install a pressure tester and check
for leaks. If a pressure tester is not available, run the
engine until normal operating temperature is reached
(allowing the system to naturally pressurize), then
check for leaks.
If you are checking for leaks with the system
at normal operating temperature, BE EX-
TREMELY CAREFUL not to touch any moving
or hot engine parts. Once temperature has
been reached. shut the enaine OFF. and
Fig. 85 Hoses are likely to deteriorate from
the inside if the cooling system is not peri-
odically flushed check for leaks around the-hose fittings and
connections which were removed earlier.
INSPECTION
b See Figures 88 and 87
The CV (Constant Velocity) boots should be
checked for damage each time the oil is changed and
any other time the vehicle is raised for service. These
boots keep water, grime, dirt and other damaging
matter from entering the CV-joints. Any of these
could cause early CV-joint failure which can be ex-
pensive to repair. Heavy grease thrown around the in-
side of the front wheel(s) and on the brake
caliper/drum can be an indication of a torn boot.
Thorouahlv check the boots for missina clamos and 3. Loosen the hose clamps at each end of the
rose requiring replacement. Clamps are usually ei-
4. Twist, pull and slide the hose off the fitting,
sking care not to damage the neck of the component
rom which the hose is being removed.
*If the hose is stuck at the connection, do
lot try to insert a screwdriver or other sharp
ool under the hose end in an eff art to free it,
IS the connection and/or hose may become
lamaged. Heater connections especially
nay be easily damaged by such a procedure.
f the hose is to be replaced, use a single-
!dged razor blade to make a slice along the
lortion of the hose which is stuck on the con-
section, perpendicular to the end of the
lose. 00 not cut deep so as to prevent dam-
aging the connection. The hose can then be
keeled from the connection and discarded. Fig. 86 CV-boots must be inspected period-
5.. Clean both hose mounting connections. In-
,pect the condition of the hose clamps and replace
hem, if necessary.
To install:
6. Dip the ends of the new hose into clean en-
fine coolant to ease installation.
7. Slide the clamps over the replacement hose,
hen slide the hose ends over the connections into
rosition.
8. Position and secure the clamps at least l/d in.
6.35mm) from the ends of the hose. Make sure they
Ire located beyond the raised bead of the connector.

DISTRIBUTOR IGNITION SYSTEM
GENERALINFORMATION 2-2
DIAGNOSISANDTESTING 2-2
SECONDARYSPARKTEST 2-2
CYLINDERDROPTEST 2-2
ADJUSTMENTS 2-3
IGNITION COIL 2-3
TESTING 2-3
REMOVAL&INSTALLATION 2-3
POWERTRANSISTOR
(Ignition Module) 2-4
REMOVAL&INSTALLATION 2-4
DISTRIBUTOR 2-4
REMOVAL&INSTALLATION 2-4 2-2
INSTALLATION 2-4
CRANKSHAFTANDCAMSHAFTPOSITION
SENSORS 2-5
DISTRIBUTORLESS IGNITION
SYSTEM 2-5
GENERALINFORMATION 2-5
DIAGNOSISANDTESTING 2-5
ADJUSTMENTS 2-5
IGNITION COIL(s) 2-5
TESTING 2-5
REMOVAL&INSTALLATION 2-6
POWERTRANSISTOR
(IGNITION MODULE) 2-7
REMOVAL&INSTALLATION 2-7
CRANKSHAFTANDCAMSHAFTPOSITION
SENSORS 2-7
FIRING ORDERS 2-7
CHARGING SYSTEM 2-8
GENERALINFORMATION 2-8
ALTERNATORPRECAUTIONS 2-8
ALTERNATOR 2-8
TESTING 2-8 I
REMOVAL&INSTALLATION 2-9
REGULATOR 2-10
REMOVAL&INSTALLATION 2-10
STARTING SYSTEM 2-10
GENERALINFORMATION 2-10
STARTER 2-10
TESTING 2-10
REMOVAL&INSTALLATION 2-11
SENDING UNITS 2-11
ENGINECOOLANTTEMPERATURE
SENDING UNIT 2-11
TESTING 2-11
REMOVAL&INSTALLATION 2-11
OIL PRESSURESENDING UNIT 2-12
TESTING 2-12
REMOVAL&INSTALLATION 2-12

.
2-12 ENGINEELECTRICAL
*This section describes the operating prina
ciples of sending units, warning lights and
gauges. Sensors which provide information
to the Enafne Control Unit (ECU) or Electronic
or Power&in Control Module (FCM/PCM) are
covered in Section 4 of this manual.
Instrument panels contain a number of indicating
devices (gauges and warning lights). These devices
are composed of two separate components. One is
the sending unit, mounted on the engine or other re-
mote part of the vehicle, and the other is the actual
gauge or light in the instrument panel.
Several types of sending units exist, however most
can be characterized as being either a pressure type
or a resistance type. Pressure type sending units
convert liquid pressure into an electrical signal which
is sent to the gauge. Resistance type sending units
are most often used to measure temperature and use
variable resistance to control the current flow back to
the indicatinq device. Both types of sendinq units are
connected inseries by a wimto the batteryithiough
the ignition switch). When the ignition is turned ON,
current flows from the battery through the indicating
device and on to the sending unit.
89572$43 Fig. 54 Place the sending unit in water and
measure the resistance
2. Disconnect the sending unit wiring harness
and remove the coolant temperature sending unit.
3. Place the sending unit tip in a pan of warm wa-
ter. Use a thermometer to measure the water tempera-
tl KP
L”,“.
4. Measure the resistance across the sending uni
terminals while the sending unit is in the water.
5. Note the ohm reading and compare to the fol-
lowing specifications: i, 56, 57, and 56
1. Disconnect the negative battery cable.
2. Position a suitable drain pan under the radia-
tor.
3. Drain the engine coolant a level below the
coolant temperature sending unit.
4. Disconnect the sending unit wiring harness,
then remove the coolant temperature sending unit
from the engine.
To install:
5. Coat the sending unit threads with a suitable
thread sealant.
6. Install the engine coolant temperature gauge
sending unit into the bore in the engine and tighten
to 7-8 ft. Ibs. (10-12 Nm).
7. Attach the electrical harness connector to the
sendina unit.
8. fill the cooling system to the proper level.
:onnect the negative battery cable.
l Water temperature of 68°F (2O”C)-
2.21-2.69 kilo-ohms resistance
l Water temperature of 158°F (7O’Ck
90.5-117.5 ohms resistance
TESTING l Water temperature of 176°F (8O”C)-
264-328 ohms resistance.
The coolant temperature sendina unit is used to
operate the temperature gauge. Donot confuse this
sending unit with the other switches or sensors used
to signal the engine control unit or air conditioning
regarding temperature of the coolant. Usually, these
other units are mounted near the coolant temoerature
sensor used for engine control. If the resistance is not approximately accurate for
the temperature, the sending unit must be replaced.
Gauge Check
1. Detach the engine coolant gauge sending unit
electrical connector.
2. Connect a suitable test liaht (12V-3.4W) be-
tween the harness side connector and the around.
I
3. Turn the ignition switch to the ON position.
4. Check the condition of the test light and gauge
as follows:
a. If all components are operating properly,
the test light should illuminate and the gauge
needle should move.
b. If the test light is illuminated and the
gauge needle does not move, replace the coolant
temperature gauge.
c. If the test light is illuminated and the
gauge needle does not move, check the fuse for
a broken wire, or resistance between the gauge
terminals
d. If the test light is not illuminated and the
gauge is not moving, check, then replace the
wiring harness, if necessar!y.
Sender Check
p See Figure 64
1. Drain the engine coolant to a level below the
coolant temperature sending unit Fig. 55 Detach the connector from the
coolant temperature sending unit
'ESTING
tauga Check
See Ftgure 69

3-2 ENGINEANDENGINEOVERHAUL
REMOVAL &INSTALLATION
# See Figure 1
In the process of removing the engine, you will
come across a number of steps which call for the re-
moval of a separate component or system, such as
“disconnect the exhaust system” or “remove the radi-
ator.” In most instances, a detailed removal proce-
dure can be found elsewhere in this manual.
It is virtually impossible to list each individual
wire and hose which must be disconnected, simply
because so many different model and engrne combi-
nations have been manufactured Careful observation
and common sense are the best possible approaches
to any repair procedure.
Removal and installation of the engine can be
made easier if you follow these basic points:
l If you have to drain any of the fluids, use a
suitable container.
l Always tag any wires or hoses and, if possrble,
the components they came from before disconnect-
ing them.
l Because there are so many bolts and fasteners
involved, store and label the retainers from compo-
nents separately in muffin pans, jars or coffee cans.
This will prevent confusion during installatron.
l After unbolting the transmisston or transaxle,
always make sure it is properly supported.
l If it is necessary to disconnect the air condi-
tioning system, have this service performed by a
qualified technician using a recovery/recycling sta-
tion If the system does not have to be disconnected,
unbolt the compressor and set it aside.
l When unbolting the engine mounts, always
make sure the engine is properly supported. When
removing the engine, make sure that any lifting de-
vices are properly attached to the engine. It is recom-
mended that if your engine IS supplied with lifting
hooks, your lifting apparatus be attached to them.
l Lift the engine from its compartment slowly,
checking that no hoses, wires or other components
are still connected.
l After the engine is clear of the compartment,
place it on an engine stand or workbench.
l After the engine has been removed, you can
perform a partial or full teardown of the engine using
the procedures outlined in this manual.
1. Relieve fuel system pressure.
Observe all applicable safety precautions
when working around fuel. Whenever servic-
ing the fuel system, always work in a well
ventilated area. Do not allow fuel spray or
vapors to come in contact with a spark or
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
2. Disconnect the negative battery cable.
3. Remove the engine undercover if equipped. 4. Matchmark the hood and hinges and remove
the hood assembly.
5. Remove the air cleaner assembly and all ad-
joining air intake duct work.
6. Drain the engine coolant, remove the radiator
hoses, and remove the radiator assembly, coolant
reservoir, and intercooler, as equipped.
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
7. Remove the transaxle and transfer case as
equipped.
8. Tag and detach the following electrical con-
nections:
l Accelerator cable l Heater hoses l Brake booster vacuum hose l Vacuum hoses l Fuel lines l Engine ground cables l Any applicable sensors l Coolant temperature and oil pressure send-
ing units
l Exhaust Gas Recirculation (EGR) tempera-
ture sensor
l Connection for the idle speed control mo-
tor
l Fuel injectors l Power transistor l Ignition coil and any applicable distributor
connections
l The connections for the alternator l Power steering pressure switch l A/C compressor l Refrigerant temperature switch l Condenser
9. Remove the air conditioner drive belt and the
air conditioning compressor. Leave the hoses at-
tached. Do not discharge the system. Place the com-
pressor aside and secure it using a suitable device.
10. Remove the power steering pump and place
the pump asrde and secure it using a surtable device.
11. Remove the exhaust manifold-to-exhaust
pipe nuts. Discard the gasket.
12. Install the engine hoist equipment and make
certain the attaching points on the engine are secure.
13. Raise the hoist enough to support the engine.
14. Remove the front and rear engine roll stop-
pers
15. Remove the left engine mount and support
Double check that all cables, hoses, harness
connectors, etc., are disconnected from the
engine.
16. Slowly lift the engine and remove it from the
vehicle.
To install:
17. Install the engine and secure all control
brackets and mounts.
18. Install the transaxle, and transfer case if
equipped.
19. The balance of the installation is the reverse
of removal with the addition of the following notes:
a. Use new clamps or O-rings to connect the
high pressure fuel lme and the fuel return line.
b. Use new gaskets to connect the exhaust
system to the engine.
c. Fill the engine with the proper amount of
engine oil and coolant.
d. Start the engine, allow it to reach normal
operating temperature.
e. Check for leaks.
f. Check the ignition timing and adjust if nec-
essary.
g. Road test the vehicle and check all fluid
levels and functions for proper operation.
Fig. 1 Alignment of the engine mount stop-
oer bracket-Diamante shown
REMOVAL &INSTALLATION
Except 3.OL (SOHC and DOHC) and 3.5L
Engines
# See Figures 2 thru 11
1. Disconnect the negative battery cable.
2. If necessary, remove the air intake hose.
3. If necessary, remove the throttle cable from
the cable routing clips.
Fig. 2 If necessary, remove the throttle ca-
ble from the cable routing clips

3-8' ENGINEANDENGINEOVERHAUL
Nm ft.lbs.
1. Engine hanger 5. Engine hanger
2. Intake manifold stay 6. Exhaust manifold cover
3. intake manifold 7. Exhaust manifold
4. Intake manifold gasket 8. Exhaust manifold gasket
7923ffi38 :ig. 28 Exploded view of the intake and exhaust manifold mounting-l .5L (4615) engine
11. Connect the negative battery cable, run the ,. . . .
vemcie unnl me tnermostat opens ano till the radiator
completely. age. Check the intake manifold water passages and
jet air passages for clogging. Clean if necessary.
12. Once the vehicle has cooled, recheck the
coolant level.
REMOVAL &INSTALLATION when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal In suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
15. Using a straight edge, measure the distortion
of the intake manifold-to-cylinder head. Total distor-
tion or warpage should be 0.006 inches (0.15mm or
less).
16. Install a new intake manifold gasket to the
head and install the manifold. Torque the manifold in
a crisscross pattern, starting from the inside and
working outwards to 13 ft. Ibs. (18 Nm).
17. Install the intake manifold support bracket
and torque the mounting bolts to 16 ft. Ibs. (22 Nm).
18. Install the engine mount support bracket and
torque the mounting bolts to 26 ft. Ibs. (36 Nm).
19. Using a new gasket, install the EGR valve and
torque the mounting bolts to 15 ft. Ibs. (21 Nm).
20. Using new insulators and O-rings, install the
fuel delivery pipe, injectors and pressure regulator to
the engine. Torque the retaining bolts to 7-9 ft. Ibs.
(10-14 Nm).
1.51 Engine
# See Figure 28
1. Relieve the fuel system pressure.
Observe all applicable safety precautions
when working around fuel. Whenever servic-
ing the fuel system, always work in a well
ventilated area. Do not allow fuel spray or
vapors to come in contact with a spark or
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
2. Disconnect battery negative cable and drain
the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
3. Disconnect the upper radiator hose, heater
hose and water bypass hose.
4. Remove the thermostat housing from intake
manifold.
5. Disconnect the accelerator cable, breather
hose and air intake hose.
6. Remove all vacuum hoses and pipes as nec-
essary, including the brake booster vacuum line.
7. Remove the throttle body assembly.
8. Disconnect the high pressure fuel line and
the fuel return hose.
9. Tag and detach the electrical connectors from
the oxygen sensor, coolant temperature sensor, in-
take air temperature, idle speed control assembly,
EGR temperature sensor, spark plug wires and dis-
tributor.
10. Remove the fuel rail, fuel injectors, pressure
regulator and insulators.
11. Remove the EGR valve from the intake mani-
fold.
12. Remove the intake manifold support bracket
and remove the engine mount support bracket.
13. Remove the intake manifold mounting bolts
and remove the intake manifold assembly.
To Install: 14. Clean all gasket material from the cylinder
head intake mounting surface and intake manifold as-
sembly. Check both surfaces for cracks or other dam- 21. Attach the electrical connectors to the oxygen
sensor, coolant temperature sensor, intake air tem-
perature, idle speed control assembly, EGR tempera-
ture sensor, spark plug wires and distributor.
22. Using a new O-ring for the feed pipe and a
new clamp for the return pipe, install the fuel hoses.
23. Install the throttle body assembly.
24. Install the vacuum hoses and pipes as neces-
sary, including the brake booster vacuum line.
25. Install and adjust the accelerator cable. Install
the breather and air Intake hose.
26. Using a new gasket, install the thermostat
housing to the intake manifold and tighten the
mounting bolts to 13 ft. Ibs. (18 Nm).
27. Connect the upper radiator hose, heater hose
and water bypass hose. Be sure to use new hose
clamps.

ENGINEANDENGINEOVERHAUL 3-9
28. Fill the system with coolant.
29. Connect the negative battery cable, run the
vehicle until the thermostat opens, fill the radiator
completely.
30. Check and adjust the idle speed and ignition
timing.
31. Once the vehicle has cooled, recheck the
coolant level.
1.8L Engine
) See Figures 29 and 30
I. Relieve the fuel system pressure.
Observe all applicable safety precautions
when working around fuel. Whenever servic-
ing the fuel system, always work in a well
ventilated area. Do not allow fuel spray or
vapors to come in contact with a spark or
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
2. Disconnect battery negative cable and drain
the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
leff in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
Fig. 29 Exploded view of the intake mani.
old mounting-1993 1.8L engine
3. Disconnect the accelerator cable and the air
intake hose.
4. Tag and detach the electrical connectors from
the oxygen sensor, coolant temperature sensor, idle
speed control assembly, EGR temperature sensor, oil
pressure switch, spark plug wires and distributor.
5. Disconnect the wiring from the throttle posi-
tion sensor, fuel Injectors and disconnect the ground
cables.
6. Remove all vacuum hoses and pipes as nec-
essary, including the brake booster and PCV vacuum
lines.
7. Disconnect the upper radiator hose, heater
hose and water bypass hose.
8. Disconnect the high pressure fuel line and
the fuel return hose.
9. Remove the fuel rail, fuel injectors, pressure
regulator and insulators.
10. Remove the intake manifold support bracket.
11. If the thermostat housing is preventing re-
moval of the Intake manifold, remove it.
12. Remove the intake manifold mounting
bolts/nuts and remove the intake manifold assembly.
To install: 13. Clean all gasket material from the cylinder
head intake mounting surface and intake manifold as-
sembly Check both surfaces for cracks or other dam-
age. Check the intake manifold water passages and
jet air passages for clogging. Clean if necessary.
14. Using a straight edge, measure the distortion
of the intake manifold-to-cylinder head. Total distor-
tion or warpage should be 0.006 inches (0.15mm or
less).
15. Install a new intake manifold gasket to the
head and install the manifold. Torque the manifold in
a crrsscross pattern, starting from the inside and
working outwards to 14 ft. Ibs. (20 Nm).
16. If removed, install the thermostat housing.
17. Install the Intake manifold brace bracket.
18. Install the fuel delivery pipe, injectors and
pressure regulator to the engine. Torque the retaining
bolts to 108 Inch Ibs. (12 Nm). 19. Using a new O-ring for the feed pipe and a
new clamp for the return pipe, install the fuel hoses,
20. Connect the upper radiator hose, heater hose
and water bypass hoses.
21. Install the vacuum hoses and pipes as neces-
sary. Be sure to connect the brake booster and PCV
vacuum lines
22. Connect the wiring to the throttle position
sensor, fuel injectors and connect the ground cables,
23. Attach the electrical wiring to the oxygen sen-
sor, coolant temperature sensor, Idle speed control
assembly, EGR temperature sensor, oil pressure
switch, spark plug wires and distributor.
24. Connect and adjust the accelerator cable and
install the air intake hose.
25. Fill the system with coolant.
26. Connect the negative battery cable, run the
vehicle until the thermostat opens, fill the radiator
completely.
27. Check and adjust the idle speed and ignition
timing.
28. Once the vehicle has cooled, recheck the
coolant level. 2.OL SOHC Engine
# See Figure 31
1. Relieve the fuel system pressure.
Observe all applicable safety precautions
when working around fuel. Whenever servic-
ing the fuel system, always work in a well
ventilated area. Do not allow fuel spray or
vapors to come in contact with a spark or
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
Fig. 30 Exploded view of the intake mani,
iold mounting-1994-00 1.8L engine Fig. 31 Exploded view of the intake mani
fold mounting-2.01 SOHC ermine

3-10 ENGINEANDENGINEOVERHAUL
2. Disconnect the battery negative cable.
3. Drain the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
4 Disconnect the accelerator cable and air in-
take hose.
5. Disconnect the upper radiator hose, heater
hose and water bypass hose.
6. Unplug the vacuum connection at the power
brake booster and the PCV valve if still connected.
Disconnect all remaining vacuum hoses and pipes as
necessary.
7. Disconnect the high pressure fuel line, fuel
return hose and remove throttle control cable brack-
ets
8. Tag and detach the electrical connectors from
the oxygen sensor, coolant temperature sensor,
therm0 switch, idle speed control assembly, EGR
temperature sensor, distributor, fuel injectors and
spark plug wires. Position the engine wiring harness
aside.
9. Matchmark the distributor housing to the in-
take manifold, and remove the distributor.
10. Remove the intake manifold bracket and the
engine hanger.
11. If the thermostat housing is preventing re-
moval of the intake manifold, remove it.
12. Remove the intake manifold mounting bolts
and remove the intake manifold assembly. Drsassem-
ble manifold from the Intake plenum on a work bench
as required
To install: 13. Clean all gasket material from the cylinder
head intake mounting surface and intake manifold as-
sembly. Check both surfaces for cracks or other dam-
age. Check the intake manifold water passages and
jet air passages for clogging. Clean if necessary.
14 Assemble the intake manifold assembly using
all new gaskets. Torque air intake plenum bolts to
11-14ff. Ibs. (15-19 Nm).
15. Install a new intake manifold gasket to the
head and install the manifold. Torque the manifold in
a crrsscross pattern, starting from the inside and
working outwards to 11-14 ff. Ibs. (15-19 Nm).
16. Install the fuel delivery pipe, injectors and
pressure regulator to the engine. Torque the retaining
bolts to 4 ft. Ibs (6 Nm).
17. install the thermostat housing, intake mani-
fold brace bracket, and engine hanger bracket.
18 Connect or install all hoses, cables and elec-
trical connectors that were removed or disconnected
during the removal procedure.
19. Align the distributor matchmarks and install
the distributor.
20. Fill the system with coolant,
21. Connect the negative battery cable, run the
vehicle until the thermostat opens, fill the radiator
completely. 22. Adjust the accelerator cable. Check and ad-
just the idle speed and ignition timing.
23. Once the vehicle has cooled, recheck the
coolant level.
1.6L and 2.OL DDHC Engines
# See Figure 32
1. Relieve the fuel system pressure.
Observe all applicable safety precautions
when working around fuel. Whenever servic-
ing the fuel system, always work in a well
ventilated area. Do not allow fuel spray or
vapors to come in contact with a spark or
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
ulosion.
2. Disconnect battery negative cable and drain
the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
Fig. 32 Exploded view of the intake mani-
fold and related components-1.6L and
2.OL DDHC engine
3. Disconnect the accelerator cable and air in-
take hose.
4. Disconnect the coolant hose from the throttle
housing.
5. Detach the vacuum connection at the power
brake booster and the PCV valve If still connected.
Disconnect all remaining vacuum hoses and pipes as
necessary.
6. Drsconnect the high pressure fuel line, fuel
return hose and remove throttle control cable brack-
ets
7. Tag and detach the electrical connectors from
the oxygen sensor, coolant temperature sensor,
therm0 switch, throttle position sensor, rdle speed
control assembly, EGR temperature sensor, distribu-
tor, fuel injectors and spark plug wires. Position the
engine wiring harness aside.
8. Remove the intake manifold bracket.
9. Remove the intake mamfold mounting bolts
and remove the intake manifold assembly. Disassem-
ble manifold on a work bench as required.
To install:
10. Clean all gasket material from the cylinder
head intake mounting surface and intake manifold as-
sembly. Check both surfaces for cracks or other dam-
age. Check the intake manifold water passages and
jet air passages for clogging. Clean if necessary.
11. Assemble the Intake manifold assembly using
all new gaskets.
12. Install a new intake manifold gasket to the
head and install the manifold. Torque the manifold in
a crisscross pattern, starting from the inside and
working outwards to 11-14 ft. Ibs. (15-20 Nm).
13. Install the fuel delivery pipe, injectors and
pressure regulator to the engine. Torque the retaining
bolts to 4 ft. Ibs. (6 Nm).
14. Install the intake manifold brace bracket and
tighten bolts to 13-18 ft. Ibs. (18-25 Nm).
15. Connect or install all hoses, cables and elec-
trical connectors that were removed or disconnected
during the removal procedure.
16. Fill the system with coolant.
17. Connect the negative battery cable, run the
vehicle until the thermostat opens, fill the radiator
completely.
18. ‘Adjust the accelerator cable.
19. Check and adjust the idle speed and ignition
timing.
20. Once the vehicle has cooled, recheck the
coolant level.
2.4L Engine
) See Figures 33 thru 51
93153p37 Fig. 33 Detach the A/C temp electrical con- 1

.
3-12 ENGINEANDENGINEOVERHAUL
93153p54
1
L Fig. 46 Remove the brake booster vacuum
hose from the back of the intake manifold Fig 47 Remove the fuel feed line-to-fuel rail’retaini”g fitti”g bo,ts . . .
Fig. 49 From underneath the vehicle, re-
move the two intake manifold support
1. Relieve the fuel system pressure.
4. Disconnect the coolant hose from the throttle
Observe all applicable safety precautions
ing the fuel system, always work in a well when working around fuel. Whenever servic-
ventilated area. Do not allow fuel spray or - __.
vapors to come in contact with a spark or
._
open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
2. Disconnect battery negative cable and drain
the cooling rtfctnm 93153p39 Fig. 50 Remove the intake manifold retain-
ing bolts . . .
h
n ousing.
5. Detach the vacuum connection at the power
b
rake booster and the PCV valve if still connected.
C lisconnect all remaining vacuum hoses and pipes as
ecessary. et air passages for clogging. Clean if necessary.
12. Assemble the intake manifold assembly using
III new gaskets.
13. Position a new intake manifold gasket on the
lead, then install the manifold. Torque the manifold
n a crisscross pattern, starting from the inside and
vorking outwards to 15 ft. Ibs. (20 Nm) for bolts, and
o 26 ft. Ibs. (35 Nm) for nuts on 1994 vehicles or 15
t. Ibs. (20 Nr$ for nuts on 1995-00 vehicles.
14. Install the fuel delivery pipe, injectors and
xessure regulator to the engine. Torque the retaining
)olts to 4 ft. Ibs. (6 Nm). Fuel injection systems remain under pres- f
sure after the engine has been turned OFF.
Properly relieve fuel pressure before discon-
necting any fuel lines. Failure to do so may [
result in fire or personal injury.
t 6. Disconnect the high pressure fuel line, fuel
return hose and remove throttle control cable brack- t
n+C.
cm. durino the removal orocedure. 15. Install the intake manifold brace bracket and
ighten bolts to 21 ft. Ibs. (29 Nm).
16. Connect or install all hoses, cables and elec-
rical connectors that were removed or disconnected
7. Tag and unplug the electrical connectors
from the coolant temperature sensor, coolant temper- 17: Fill the system with coolant.
18 Connect the negative battery cable, run the
, . : .., ,, ., , ,
,,,, ,. ,.
93153p73 Fig. 51 . . .
then remove the manifold from
the cylinder head
Ruver open, service or drain the radiator or
@Ming system when hot; serious burns can
II&ur from the steam and hot coolant. Also,
draining engine coolant, keep in mind ’
j “thiat cats and dogs are attracted to ethylene
. . . ..____ “..” 11_,1 -...... any that is
t uncovered container or in puddles
FE ol iha ground. This will prove fatal in suff i-
k ici?M quantities. Always drain coolant into a
$1 pealable container. Coolant should be reused
h’ uniass it is contaminated or is several years
j$O'd.
**w
ature gauge, IAC valve, ignition coil, EGR tempera-
ture sensor, knock sensor, oxygen sensor, throttle
position sensor, distributor, A/C temperature sensor,
fuel injectors and ignition power transistor. Position
the engine wiring harness aside.
8. Label and disconnect the spark plug wires
from the spark plugs.
9. Remove the intake manifold stay bracket.
IO. Remove the intake manifold mounting bolts
and remove the intake manifold assembly. Disassem-
ble manifold on a work bench as required.
Tan is”.+..ll. vemcle unrn me mermosrar opens, ml tne raalaror
completely.
19. Adjust the accelerator cable. Check and ad-
just the idle speed and ignition timing.
20. Once the vehicle has cooled, recheck the
coolant level.
3.OL and 3SL Engines
ti See Figures 52 thru 57
1. Relieve the fuel system pressure.
W.>. Clean all gasket material from the cylinder
!&S head intake mounting surface and intake manifold as-
fir!: 3. Disconnect the accelerator cable, breather
Observe all applicable safety precautions
El .;,
+w..” and air intake hose. sembly. Check both surfaces for cracks or other dam-
age. Check the intake manifold water passages and when working around fuel. Whenever servic-

ENGINEANDENGINEOVERHAUL 3-13
EGR pipe - Up to 1993 model
EGR pipe - From 1994 model
Intake manlfold plenum stay, rear
Intake manifold plenum stay. front
EGR valve
EGR valve gasket
Throttle body >
Throttle body gasket
Intake mantfold plenum
Intake manifold plenum gasket
:ig. 52 Exploded view of air intake plenum assembly-3.01 DOHC engine
ing the fuel system, always work in a well
3. Remove the air intake hose(s). ventilated area. Do not allow fuel spray or 4. Disconnect the accelerator control cables vapors to come in contact with a spark or from the throttle body. open flame. Keep a dry chemical fire extin-
guisher near the work area. Always keep fuel
in a container specifically designed for fuel
storage; also, always properly seal fuel con-
tainers to avoid the possibility of fire or ex-
plosion.
2. Disconnect battery negative cable and drawn
the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
5. Tag and disconnect the vacuum hoses in-
cluding the brake booster hose.
6. Tag and detach the wire harness connectors,
7. Disconnect the high pressure and return fuel
hoses.
8. Disconnect EGR pipe and remove the EGR
valve and EGR temperature sensor from the intake
plenum assembly.
9. If equipped, remove the manifold pressure
sensor.
10. Remove the plenum retaining bracket.
11. Remove the plenum retaining nuts and bolts
and remove the air intake plenum from the intake
manifold. Discard the gasket.
12. Remove the upper timing belt covers.
13. Remove the water pump stay bracket.
*It is not necessav to remove the fuel ln-
jectors from the intake unless the manifold ,
assembly is being replaced.
14. Remove the fuel rail with the injectors at-
tached. 15. Disconnect the coolant hoses from the intake
manifold. Be sure to note the connections.
16. Remove the intake manifold mounting nuts
and remove the intake manifold.
17. Clean the gasket mounting surfaces.
To install: 18. Check all items for cracks, clogging and
warpage. Maximum warpage is 0.0059 inches
(0.15mm). Replace any questionable parts.
19. Thoroughly clean and dry the mating surfaces
of the heads, intake manifold and air intake plenum.
20. Install new intake manifold gaskets to the
cylinder heads with the adhesive side facing up.
21. Place the manifold on the cylinder heads.
22. Lubricate the studs lightly with oil and install
the nuts.
23. For vehicles produced up to and including
November of 1993, tighten the mounting nuts as fol-
lows:
a. Front bank nuts: 27-43 inch Ibs. (3-5 Nm)
b. Rear bank nuts: 9-11 ft. Ibs. (12-15 Nm)
c. Front bank nuts: 9-11 ft. Ibs. (12-15 Nm)
24. For vehicles produced after November of
1993, tighten the mounting nuts as follows:
a. Front bank nuts: 48-72 inch Ibs. (5-8 Nm)
b. Rear bank nuts to: 14-17 ft. Ibs. (20-23
Nm)
c. Front bank nuts to: 14-17 ft. Ibs. (20-23
NM
25. Using new clamps, connect the coolant hoses
to the intake manifold.
26. Using new O-rings, install the fuel rail as-
sembly, if removed. Tighten the mounting bolts to
7-9 ft. Ibs. (10-13 Nm).
27. Install a new intake air plenum gasket and in-
stall the plenum. Tighten the retaining nuts and bolts
evenly and gradually to 13 ft. Ibs. (18 Nm).
28. Install the retaining bracket and tighten the
retaining bolts to 13 ft. Ibs. (18 Nm).
29. If removed, install the manifold pressure sen-
sor.
30. Using a new gasket, install the EGR valve and
tighten the bolts to 16 ft. Ibs. (22 Nm).
31. Install the EGR temperature sensor and
tighten the fitting to 7-9 ft. Ibs. (10-12 Nm).
32. Connect the EGR pipe and tighten the fittings
to 43 ft. Ibs. (60 Nm).
33. Replace the O-ring and connect the high
pressure fuel hose. Tighten the retaining bolts to 48
inch Ibs. (5 Nm).
34. Using a new hose clamp, connect the fuel re-
turn hose.
35. Install the water pump stay bracket.
36. Install the upper timing belt covers.
37. Connect the harness connector and vacuum
hoses.
38. Connect and adjust the accelerator cables.
39. Install the air intake hose(s).
40. Fill the system with coolant.
41. Connect the negative battery cable, run the
vehicle until the thermostat opens, fill the radiator
completely.
42. Check and adjust the idle speed and ignition
timing.
43. Once the vehicle has cooled, recheck the
coolant level.

.
3-20 ENGINEANDENGINEOVERHAUL
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
3. Remove the overflow hose and disconnect
the upper radiator hose.
*It is recommended that each clamp be
matchmarked to the hose. Observe the marks
and reinstall the clamps exactly when rein-
stalling the radiator.
4. If equipped with an automatic transaxle, re-
move and plug the fluid cooler hoses.
5. Unplug the electrical connector(s) from the
coolant fan motor.
6. Remove the mounting bolts, then remove the
fan and shroud assembly from the vehicle.
7. Remove the fan blade retainer nut from the
shaft on the fan motor and separate the fan from the
motor.
8. Remove the motor to shroud attaching
screws and the motor from the shroud.
To tnstall: 9. Install the motor to the shroud and secure
with the mounting bolts.
10. Install the remaining components in the re-
verse order of removal.
11. Fill the coohng system. Connect the negative
battery cable and check the cooling fan for proper op-
eration.
Diamante
# See Figure 94
1. Disconnect the negative battery cable 2. Drain the cooling system only when the radi-
ator and the engine are at safe temperatures. 1. Disconnect the negative battery cable
2. Drain the cooling system.
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
3. Unplug the cooling fan and radiator sensor
connector(s). Most of these connectors employ a wa-
terproof connector. When disconnecting, make sure
all parts of the connector remain intact.
4. Disconnect the upper radiator hose from the
radiator and remove overflow tank.
5. Remove the fan mounting screws. The radia-
tor and condenser cooling fans are separately remov-
able.
6. Remove the fan assembly and disassemble
Never open, service or drain the radiator or
cooling system when hot; serious burns can
occur from the steam and hot coolant. Also,
when draining engine coolant, keep in mind
that cats and dogs are attracted to ethylene
glycol antifreeze and could drink any that is
left in an uncovered container or in puddles
on the ground. This will prove fatal in suffi-
cient quantities. Always drain coolant into a
sealable container. Coolant should be reused
unless it is contaminated or is several years
old.
3. Remove the engine undercover.
4 Disconnect the clamp bolt from the power
steering hose.
5. Remove the engine drive belts.
6. Support the engine with the appropriate
equipment and remove the engine mount bracket.
7. Remove the timing belt Reier to the timing
belt procedure in this section
8 Remove the power steering pump bracket.
9. Remove the alternator brace.
as required.
To install: 7. Posrtion the fan and install the mounting
screws
*The water pump mounting bolts are differ-
ent in length, note their positioning for re-
assembly.
8 Install the electrical connectors and the upper
radiator hose.
9. Refill the cooling system.
IO. Connect the negative battery cable and check
the fan for orooer ooeration. 10. Remove the water pump, gasket and O-ring
where the water inlet pipe(s) joins the pump.
To install: 11, Thoroughly clean both gasket surfaces of the
water oumo and block.
12. For 1.5L engines, install a new O-ring into
the groove on the front end of the water inlet pipe. Do
not apply oils or grease to the O-ring. Wet the O-ring
with water only
13. For 1.8L engines, apply a 0.09-0.12 in.
(2.5-3 Omm) continuous bead of sealant to water
pump and rnstall the pump assembly. Install the wa-
ter pump within 15 minutes of the applrcation of the
REMOVAL & INSTALLATION
1.5L and 1.8L Engine
) See Figures 95 and 98
7923PGO :ig. 94 Exploded view of the fan mounting and related components- Fig. 95 Water pump and related components-Mirage with 1.51
liamante (4615) engine