engine MITSUBISHI ECLIPSE 1991 Service Manual

9-74ENGINE <2.0L DOHC Engine>- Service Adjustment Procedures
ENGINE <2.0L DOHC Engine>
SERVICE ADJUSTMENT PROCEDURES pi
CHECKING COMPRESSION PRESSURENOSFFAH(1) Before checking compression, ensure that engine oil, the
starter motor, and battery are all in good condition.
(2) Start the engine and wait until engine coolant temperature
has risen to
85-95°C (185-205°F).
(3) Stop the engine and pull the spark plug cables.
(4) Remove the spark plugs.
(5) Crank the engine
to. remove any foreign objects in the
cylinders.
Caution
Cover the spark plug holes with shop towel, etc., in
order to keep expelled foreign objects from flying out,and keep away from the holes. When measuring
compression with water, oil, or fuel having entered the
cylinder through a crack, etc., these will come flying
out of the spark plug hole hot and fast, so be sure to
take the proper precautions.(6) Set the compression gauge to the spark plug hole.
(7) Holding the throttle valve full open, crank the engine and
measure compression.
Limit:
: Min. 960 kPa (137 psi)
[250-400 rpm]6: Min. 800
kPa (114 psi) [250-400 rpml-(8) Perform 6 and 7 above for all the cylinders, ensuring that
compression pressure differential for each of the cylinders
is within the specified limit.
Differential limit: Max. 100 kPa (14 psi)(9) If a cylinder’s compression or pressure differential exceeds
the limit, add a small amount of oil through the spark plug
hole and repeat steps (6)-(8).
@If the addition of oil brings compression up, it is possiblethat there is poor contact between the piston ring and
cylinder wall.
@ If not compression does not come up, valve seizure,
poor valve seating, or a compression leak from the
gasket are all possible.‘I

_-
a--ENGINE
<2.0L DOHC Engine> -Service Adjustment Procedures9-75
JMANIFOLD VACUUM INSPECTION
NO9FNAO(1) Before inspection and adjustment, put the vehicle into the
following state.
l Engine coolant temperature:
85-g5”C (185-205°F)
l Lights, electric, cooling fan, and accessories: OFF
lTransaxle: Neutral (N or
P for vehicles with an automa-
tic transaxle)
l Steering wheel: Neutral position
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value:: 490
mmHg (19.3 in.Hg): 480
mmHg (18.9 in.Hg)(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
ymptomICause1 Remedy
The vacuum gauge reading is less than
standard value, but the pointer is
stable.
The vacuum gauge pointer swingsslowly.
l Ignition timing is retarded.
l Air mixture concentration too
rich.
l Adjust the ignition timing.
l Check ECI-MULTI system.
The vacuum gauge pointer drops
irre-gularly.l Air mixture concentration too
lean.
l Check ECI-MULTI system.
The vacuum gauge pointer drops inter-mittently to 30 to 160
mmHg (1.2 to
6.3 in.Hg).
The vacuum gauge pointer drops sud-
denly from the normal reading to 250
mmHg (9.8 in.Hg), then returns tonormal.
l Incomplete close contact of in-
take and exhaust valve seat.
l Broken cylinder head gasket
l Check and repair the valve.
l Replace cylinder head gasket.

9-76ENGINE <2.0L DOHC Engine> -Service Adjustment Procedures
LASH ADJUSTERS CHECKNOBFEABalIf an abnormal noise is heard from the lash adjusters check as
follows.
(1) After warming up the engine, stop it.
(2) While installed to the cylinder head, press the part of rockerarm that contacts the lash adjuster. The part pressed will
feel very hard if the lash adjuster condition is normal.
(3) If, when pressed, it easily descends all the way downward,
replace the lash adjuster.
(4) If there is a spongy feeling when pressed, air is probably
mixed in, and so the cause should be investigated. The
cause is probably an insufficient amount of engine oil, or
damage to the oil screen and/or screen gasket.
(5) After finding the cause and taking the appropriate step
(adding oil or repair), warm up the engine and drive at low
speed for a short time. Then, after stopping the engine andwaiting a few minutes, drive again at low speed. Repeat
this procedure a few times to bleed out the air from the oil.

ENGINE <2.0L DOHC Engine> - Engine Mounting
ENGINE MOUNTING
- REMOVAL AND INSTALLATION
9-77
NOBGA-B
*Raise and Suspend the Engine to theExtent Force is not applied to the Engine
Post-installation Operation@Lower the Engine50-65 Nm36-47 ftlbs.
Removal steps
50-65 Nm36-47 ftlbs.
OlAO559I1. Pressure hose (power steering)2. Bracket
3. Engine mount bracket and body
connection bolt4. Engine mount bracket
l + 5. Mounting stopper
NOTE(1) Reverse the removal procedures to reinstall.(2) *+ : Refer to “Service Points of Installatron”.
Engine side
CI
Mounting stopper
AnowOlA0004
INSPECTIONNOSGCAHJl Check each insulator for cracks or damage.
l Check each bracket for deformation or damage.
SERVICE POINTS OF INSTALLATIONNOSGDAKl5. INSTALLATION OF MOUNTING STOPPER
Install the mounting stopper of the engine mount bracket
so that the arrow faces the center part of the engine.

9-78ENGINE <2.0L DOHC Engine> - Transaxle Mounting
TRANSAXLE MOUNTING
REMOVAL AND INSTALLATION
No9GE-6
l installation of the Air Cleaner
40-50 Nm
29-36 ftlbs.
/ 660-80 Nm
43-58 ftlbs.
Transaxle
mount
bracketOlA0645

40-50 Nm
*
6
625”
/60-80Nm-f-h
Removalsteps43-58ftlbs.61t
4*I. ABS hydraulic unit
2. Transaxle mount bracket and transaxle
connection bolt
3. Caps
4. Transaxle mount bracket installation bolts
5. Transaxle mount bracket6. Mounting stopperNOTE(I) Reverse the removal procedures to reinstall.(2) +* : Refer to “Service Points of Removal”.(3) *: SERVICE POINTS OF REMOVAL
1. REMOVAL OF ABS HYDRAULIC UNITRefer to GROUP
5-Hydraulic Unit.
NO9GEAA
INSPECTIONNOSGCAH4l Check each insulator for cracks or damage.
l Check each bracket for deformation or
dsmage.

ENGINE <2.0L DOHC Engine> - Engine Roll Stopper
ENGINE ROLL STOPPER
- REMOVAL AND INSTALLATION
9-79
NOSGF-B
X
l Raise and Suspend the Engine to the
40-50Nm29-36ft.lbs.
Post-installation Operation
@Lower the Engine40-50 Nm
1
40-50 Nm3
40-50Nm29-36ft.lbs.
29-36ft.lbs.In/5
/4
\
50-65 Nm
36-47 ftlbs.
Front roll stopper bracket removal steps
1. Front roll stopper bracket and engineconnection bolt
2. Front roll stopper bracket installation bolts
l +3. Front roll stopper bracket
Rear roll stopper bracket removal steps
4. Rear roll stopper bracket and engine
connection bolt
5. Rear roll stopper bracket installation bolts
l +6. Rear roll stopper bracket
NOTE(I) Reverse the removal procedures to reinstall.
(2) l + : Refer to “Service Points of Installation”.(3) q : Non-reusable parts(4)For tightening locations indicated by the * symbol, fjrsttighten temporarily, and then make the final tightenrngwith the entire weight of the engine applied to the
vehicle body.
INSPECTIONNOSGCAHSl Check each insulator for cracks or damage.
l Check each bracket for deformation or damage.

9-80ENGINE <2.0L DOHC Engine> - Engine Roll Stopper
Rear roll
-92
.7 mm-3.6in.)12A0638
Forward
0
:fYVD>Front roll
stopper bracket
/
jl.7-57.7 mm2.0-2.3 in.)olR003t

44-50 mm(1.7-2.0 in.)Front rollOlAO610
J
ISERVICE POINTS OF INSTALLATION
N-$?y
6. INSTALLATION OF REAR ROLL STOPPER BMFKE? AWD-A/T>, (1;r.After temporarily tightening the rear roll stopper bracket,
tighten so that, in the unladen vehicle condition, the
distance from the center hole of the insulator to
th:e lower
edge of the bracket is the specified distance.
3. INSTALLATION OF FRONT ROLL STOPPER BRACKET(1) Install the front roll stopper bracket so that the part
where the round hole is made is facing the front of the
vehicle.(2) After temporarily tightening the front roll stopper
bracket, tighten so that, in the unladen vehicle condi-
tion, the distance from the center hole of the
insul&torto the lower edge of the bracket is the specified
-
distance.

ENGINE <2.0L DOHC Engine> - Engine Assembly
ENGINE ASSEMBLY
- REMOVAL AND INSTALLATION
;-
Pre-removal Operationl Eliminating Fuel Pressure in Fuel Line(Refer to GROUP 14-Service AdjustmentProcedures.)*Removal of Engine Hood
@Draining of Engine Coolant(Refer to GROUP 7-Service Adjustment Pro-
cedures.)*Removal of the Transaxle Assembly
(Refer to GROUP 21 -Transaxle Assembly.)
*Removal of the Radiator
(Refer to GROUP 7-Radiator.)
*Removal of Under Cover Left
26'
15
I4-6 Nm\I /MAO571
19@Installation of Under Cover Left
*Installation of the Transaxle Assembly
(Refer to GROUP 21 -Transaxle Assembly.)
I l Refilling of Enaine Coolant
/22/ 4-6 ‘Nm\213-4 ftlbs.23
Removal steps
~~1. Connection for accelerator cable orthrottle cable
2. Connection for accelerator cable (Auto-
cruise control)3. Connection for fuel return hose
4. Connection for brake booster vacuum
hose
5. Connection for solenoid valve (Turbo)
6. Solenoid valve bracket (Turbo)
7. Connection for air hose A (Turbo)
8. Connection for air hose
C (Turbo)9. Connection for fuel high pressure hose
10. O-ring11. Connection for heater hoses12. Connection for vacuum hoses
13. Connection for oxygen sensor
14. Connection for engine coolant
temperature sensor
15. Connection for engine coolant
temperature gauge unit(Refer
t’o GROUP 7-Service Adjustment Pro-cedures.)l Installation of Engine Hood‘I
16. Connection for engine coolanttemperature switch (Air conditioner)
17. Connection for crank angle sensor
18. Connection for TPS19. Connection for
ISC and idle switch
20. Connection for fuel injectors
2 1. Connection for ignition coil22. Connection for power transistor
23. Connection for knock sensor (Turbo)
24. Connection for EGR temperature sensor
(California vehicles only)
25. Connection for ground cable26. Control wiring harness
NOTE(I) Reverse the removal procedures to reinstall.
(2) e+ : Refer to “Service Points of Installation”.(3) m : Non-reusable parts

9-82ENGINE <2.0L DOHC Engine> - Engine Assembly
23-27 Nm
/17-20 ftlbs.
60-60 Nm
43-58 ft.lbs.50-65 Nm*36-47 ft.lbs.*27. Connection for oil pressure switch (Power
steering)28. Connection for alternator
29. Alternator wiring harness clamp
30. Connection for oil pressure switch
31, Connection for oil pressure gauge unitl + l * 32.Power steering oil pump+9 ~~ 33. Air conditioner compressor
34. Self-locking nuts
35. Gasket
36. Pressure hose (Power steering)
37. Bracket
4*38. Engine mount bracket
30-40 Nm
22-29 ftlbs.
.--
OlAO561
1
I40-60 Nm
29-43 ft.lbs.39. Self-locking nut
+e l + 40. Engine assembly
NOTE(I) Reverse the removal procedures to reinstall.(2) l * : Refer to “Service Points of Removal”.(3) I)+ : Refer to “Service Points of Installation”.(4) m : Non-reusable parts(5)For tightening locations indicated by the * symbol, first
tighten temporarily, and then make the final tightening
with the entire weight of the engine applied to the
vehicle bodv.
SERVICE POINTS OF REMOVALNOSSBDFa
32. DISCONNECTION OF POWER STEERING OIL PUMPDisconnect the oil pump with hoses from the bracket.
NOTEThe removed power steering oil pump should be fastened
A(by using rope, etc.) in a position that will not interfere with
the removal/installation of the engine assembly.

r-.ENGINE <2.0L DOHC Engine>
- Engine AssemblyS-83
OlA0177
-mpp.-/- --OlA0553
33. DISCONNECTION OF AIR CONDITIONER COMPRESS-
ORDisconnect air conditioner compressor connector and
remove it with hoses from the compressor bracket.
NOTEThe removed air conditioner compressor should be fas-
tened (by using rope, etc.) in a position that will not
interfere with the removal/installation of the engine assem-
bly.
38. DISCONNECTION OF ENGINE MOUNT BRACKET
Before removing the engine mount bracket installation bolt,use a chain block or similar arrangement to suspend the
engine assembly (to the extent that there is no looseness
of the chain).
40. DISCONNECTION OF ENGINE ASSEMBLY
After checking that the cables, hoses, harness connectors,etc. are all removed, slowly raise the chain block to lift the
engine assembly upward out of the engine compartment.
SERVICE POINTS OF INSTALLATION
NOSSDAU
40. INSTALLATION OF ENGINE ASSEMBLYWhen mounting the engine, check to be sure that the
cables, hoses, harness connectors, etc. are all in the
correct position.
33. INSTALLATION OF AIR CONDITIONER COMPRESSORRefer to GROUP
24-Service Adjustment Procedures.
32. INSTALLATION OF POWER STEERING OIL PUMPRefer to GROUP 1
g-service Adjustment Procedures.
1. ADJUSTMENT OF ACCELERATOR CABLERefer to GROUP 14-Service Adjustment Procedures.