check engine MITSUBISHI GALANT 1989 Service Owner's Guide

ENGINE - Timing Belt
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6x50
(.24x1.97)6x20(.24x.78)
6x22(.24x.87,
6x18(.24x.71)
6x251.24x.98)6x18(.24x.71)
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(7) If the clearance between the tensioner arm and the
auto tensioner body cannot be measured (when the
engine is being mounted, etc.), the following proce-
dures can be used to substitute for the ordinary
method of measurement.
@Screw in the tool until it contacts the tensioner arm.
@From that point of contact, further screw in the tool,
screwing it in until the push rod of the auto ten-
sioner body is caused to move backward and the
tensioner arm contacts the auto tensioner body. Check to be sure that the amount that the tool has
been screwed in (when the push rod moves back-
ward) is the standard value.
Standard value: 2.5-3 turns
(8) Install the rubber plug to the timing belt rear cover
10. INSTALLATION OF TIMING BELT LOWER COVER/S.
TIMING MELT UPPER
COVER
The dimensions of the installation bolts for the timing co-
vers differ according to the installation location, so be sure not to install the bolts in the incorrect locations.
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ENGINE - Service Adjustment Procedures 11-57
OlR0340
7EN0393
1SERVICE ADJUSTMENT PROCEDUBFzo
ENGINE OIL CHECK
(1) Check to ensure that the engine oil level is within the level
range indicated on the oil dip stick.
(2) Check to ensure that the oil is not noticeably dirty or mixed
with coolant or gasoline, and that it has the proper
vtscosity. IASH
ADJUSTERS CHECK
NOTE MllFEAGb
Soon after the engine IS started or while it is running,
abnormal noise (clattering) which may be attributed
to the
adjuster sounds but does not stop. In this case, check the
following.
(1) Check the engine oil, and refill or replace oil if necessary.
NOTE 0
If the oil amount is small, air will be sucked from the oil
strainer and mixed in the oil passage. 0
If the oil amount is excessive, the oil will be stirred by
the crank and mixed with a large amount of air. 0
Air and oil can not be separated easily in the deterio-
rated oil, and the amount of air mixed in the oil
increases.
If such mixed-in air enters the high pressure chamber in
the lash adjuster, the air in the high-pressure chamber will
be compressed while the valve is opened, the lash adjuster
will be excessively compressed and abnormal noise will be produced when the valve is closed.
This is the same phenomenon which occurs when the
valve clearance is improperly adjusted to be excessively
large.
However, it will return to be normal if the air entrapped in
the adjuster is released in this case.
(2) Start the engine, and slowly
race* it several times (10 times
or less). If the abnormal noise is eliminated by racing the engine, it
means that the air is released from the high-pressure
chamber of the lash adjuster and the function of the lash adluster
is returned to normal.
l Gradually increase the engine speed from the idle
speed to 3,000 rpm (for 30 seconds), and then
gradually slow down the engine to the idling speed (for
30 seconds).
NOTE 0
If the vehicle is parked on a slope for a long time, the
oil will be sometimes reduced in the lash adjuster, and
air will enter the high-pressure chamber when the
engine is started.
lAfter the vehicle is parked for a long time, the oil will go
out of the oil passage. Since it takes a little time to
supply oil to the lash adjuster, air sometimes enters the
high-pressure chamber.
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11-58ENGINE - Service Adjustment Procedures
4 Timing belt sideI
6EN0515
(3) lf
any abnormal noise IS not eliminated by racing. check the
lash adjuster
@ Stop the engine.
@ Set the engine so that cylinder
No. 1 IS positioned at
the top dead centre of the compression.
@ Press the rocker arm at the area indicated by the+
arrow mark to check whether the rocker arm is lowered
or not.
@ Slowly turn the crankshaft 360 degrees clockwise.
@ ln the same procedure as Step 0, check the rocker
arm at the area indicated by the
4 arrow mark.
@ If the rocker arm lowers easily when the part directly above the rocker arm lash adjuster is pressed, the lash
adjuster is defective and must be replaced. When re- placing the lash adjuster, bleed the air from all adjus-
ters and then assemble them. Then inspect with proce- dures
@I to 0, and confirm that there are no abnormal-
ities.
NOTE
lThe lash adjuster can be accurately checked for de-
fects with the leak down test.
l Refer to the engine service manual for the leak
down test and lash adjuster air bleeding procedure.
If the rocker arm is extremely hard when pressed
down, the lash adjuster is normal, so look for a different
cause of abnormal sound.
DASH POT INSPECTION AND ADJUSTMENT

(1) Perform after inspecting the idle rotation speed.
(2) The vehicle should be prepared as follows before the inspection.
l Engine coolant temperature:
80- 95°C
(176- 203°F)
lLights, electric cooling fan and accessories: OFF
l Transaxle: Neutral
l Steering wheel: neutral position
(3) Either set the tachometer or connect the data link connec- tor (white) to the scan tool.
NOTE
For setting the tachometer. refer to GROUP 13 - Service
Adjustment Procedures.
(4) Start the
engine.
(5) Open the throttle valve until the dash pot rod is fully
stroked.
(6) Gradually close the throttle valve until you find the point where the throttle lever touches the dash pot rod (the dashpot begins to shorten).
Maintain the throttle valve at this touching point,
(7) Check the engine speed (speed when the dash pot begins to operate).
Standard value: 3,900
f 200 rpm
(8) If outside the standard value, loosen the rod’s lock nut and turn the rod to adjust.
(9) To release the maintained state of the throttle valve, check that the engine speed gradually decreases to the idle speed, (10)Disconnect
the closed throttle position switch connector
(fixed SAS).
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ENGINE - Service Adiustment Procedures11-59
7 Go;;ikv position
switch
(11)Check that there is continuity between the closed throttle
position switch terminal and body.
NOTE
When there is continuity, a clearance will be created between the throttle lever and dash pot rod when the dash
pot rod is pressed lightly.
(12) When there is no continuity, lower the engine speed when the dash pot begins operation to within the standard value
tolerance. Make sure to create continuity between the
closed throttle position switch terminal and body.
COMPRESSION PRESSURE CHECK Ml 1 FFAL
(1) Before inspection, verify that the engine oil, starter motor
and battery are normal. Then, perform the following.
lEngine coolant temperature: 80- 95°C
(1 76- 205’F)
l Lights, electnc
cooling fan and accessories: OFF
0 Transaxle: P range 0 Steering wheel: Neutral position
(2) Disconnect the spark plug cable.
(3) Remove all the spark plugs.
(4) Disconnect the connector of the crankshaft position sensor.
NOTE
This will prevent the engine control module from controll- ing the ignition and fuel injection.
(5) Cover the spark plug holes with a cloth, etc., and crank the engine. Then verify that no foreign material sticks to the
cloth, etc.
Caution
1.During cranking, be especially careful of the spark plug
installing hole.
2. Very hot water, oil, fuel, etc., which may have entered
the cylinder somehow, will violently spout through the
spark plug hole if the compression is measured in the
entrapped state. This is
vex/ dangerous.
(6) Set up the compression gauge in the spark plug mounting
hole.
(7) Fully open the throttle valve, and cranking the engine.
measure the compression pressure.
Standard value: Up to 1991: 1,350
kPa (192 psi) [250- 400 rpml
From 1992: 1,550
kPa (220 psi) [250-400 rpm]
1 ,150 kPa (164 psi) [250- 400 rpml
Limit:

up to 1991: 960
kPa (137 psi) [250- 400 rpml
From 1992: 1 ,120 kPa (159 psi) [250- 400 rpml
CTurbo>
800
kPa (114 psi) [250- 400 rpml
(8) Measure the compression pressure of each cylinder. and verify that the pressure difference among the cylinders
is
less than the limit value.
Limit: max. 100
kPa (14 psi) TSB Revision
I

II-60ENGINE -Service Adjustment Procedures
(9) If a cylinder’s compression pressure or pressure differenceis outside the limit, fill a small amount of engine oil through
the spark plug hole and repeat Items (7) and (8) above.
@ If the compression is increased when the oil is filled, the piston
and/or cylinder wall may be worn or
damaged.
@ If the compression is not Increased even though the oil is filled, the valve may be thermally seized, the valve
contact may be improper or pressure may leak at the
gasket. (10)Connect the connector of the crankshaft position sensor.
(1l)lnstall
the spark plug and spark plug cable.
(12)Erase the diagnostic trouble code with the scan tool or re-
connect the battery (-)
cable 10 seconds or more after it
was disconnected.
NOTE
This will erase the memory of the diagnostic trouble code which resulted from disconnection of the crankshaft posi-
tion sensor connector.
MANIFOLD VACUUM INSPECTION MllFNAD
(1) Before inspection and adjustment, put the vehicle into the following state.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, motor cooling fan, and accessories: OFF
l Transaxle:
N (Neutral)
l Steering wheel: Neutral
(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: Approx. 500 mmHg
(20 in.Hg)
(5) If outside the standard value, isolate the cause by referring to the following table and repair the fault.
Symptom
CauseRemedy
l The vacuum gauge reading is less thanstandard value, but the pointer isl Ignition timing is retarded. l Adjust the ignition timing.
stable.
l The vacuum gauge pointer swings
slowly.l The gas mixture is excessivelyrich.l Check Multiport fuel injectionsystem.
l The vacuum gauge pointer drops irre- gularly.
l The gas mixture is excessively
lean.l Check Multiport
fuel injectionsystem.
l The vacuum gauge pointer drops inter-mittently to 30 to 160 mmHg
(1.2 to * Incomplete close contact of Intake
and exhaust valve seats.l Check and repair the valve.
6.3 in.Hg).
l The vacuum gauge pointer drops sud- denly
from the normal reading to 250 . Broken cylinder head gasketl Replace cylinder head gasket.
mmHg (9.8 in.Hg), then returns tonormal.
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ENGINE - Service Adjustment Procedures11-61
DRIVE BELTS TENSION ADJUSTMENT
MllFMBBl
(1) Check that the belts are not damaged.
Power
steering
oil pump
pulley , W
ater
pump
pulley
Tension
pulley
f /
xI J
b
L ‘d
p1 Genkrator
I
Ipulley
Crankshaft
Air
pulley conditioning
compressor
pulley
Spindle Spindle
2Y
\Hook
xi@--
V-ribbed belt
Hook
r
Type BRESET button (2) Apply
100N (22 Ibs.) force to the belt back midwa
y
between the pulleys as shown in the figure, measure the
deflection or, by using a belt-tension gauge, check the
belt’s tension.
Standard value:
Items
For
AKDeflection Approx. 8.05.0-5.56.0-7.0
comDressormm (in.)t.3151(.197-,217) (.236-.276)I
NOTE
There is more than one type of belt-tension gauge (type A and
type
B, for example), so be sure to use the gauge according to
its instructions for use.
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II-62ENGINE - Service Adjustment Procedures
Lock boltTENSION ADJUSTMENT OF THE GENERATOR DRIVE
BELT
Caution
1. Before checking, turn the engine one time or more.
2.If the belt tension is too strong, it is possible that the
generator or water pump bearing is damaged. If the belt tension is too weak, however, sounds of its slip-
ping will be heard, and the belt’s service life will be
reduced.
1.Loosen the generator pivot nut
2. Loosen the lock bolt of the belt tension adjuster.
3. Using the adjustment bolt, adjust the belt tension to
specified.
4. Tighten the lock bolt.
5.Tighten the generator pivot nut.
6.Check the deflection or the tension of the belt; readjust if
necessary.
NOTE
Even for a new belt, the adjustment value for a used belt
should be used to make the adjustment if the belt has been used for as long as five minutes or more.
DEFLECTION ADJUSTMENT OF POWER STEERING OIL
PUMP DRIVE BELT 1. Loosen power steering oil pump fixing bolt.
2. Move power steering pump, tension belt moderately and adjust deflection.
3. Tighten fixing bolts.
4. Run the engine one time or more. 5. Check the belt deflection. Readjust, if necessary.
IIOlA0059
r
TSB Revision TENSION ADJUSTMENT OF THE AIR CONDITIONING
COMPRESSOR DRIVE BELT
1. Loosen tension pulley fixing bolt A.
2. Adjust belt deflection with adjusting bolt B.
3. Tighten fixing bolt A.
4. Run the engine one time or more. 5. Check the belt tension. Readjust, if necessary.
NOTE
Even for a new belt, the adjustment value for a used belt
should be used to make the adjustment if the belt has been
used for as long as five minutes or more.

ENGINE - Engine AssemblyII-67
SERVICE POINTS OF REMOVAL
MllSBDF
32. DISCONNECTION OF POWER STEERING OIL PUMP Disconnect the oil pump with hoses from the bracket.
NOTE
The removed power steering oil pump should be fastened(by using rope, etc.) in a position that will not interfere
with the removal/installation of the engine assembly.
33. DISCONNECTION OF AIR CONDITIONING COMPRESSOR
Disconnect air conditioning compressor connector and re-
move it with hoses from the compressor bracket.
NOTE
The removed air conditioning compressor should be fas-
tened (by using rope, etc.) in a position that will not inter-
fere with the removal/installation of the engine assembly. OlA0177
37. DISCONNECTION OF ENGINE MOUNT BRACKETBefore 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).
39. REMOVAL OF ENGINE ASSEMBLY After checking that the cables, hoses, harness connec-
tors, etc. are all removed, slowly raise the chain block tolift the engine assembly upward out of the engine
compartment.
SERVICE POINTS OF INSTALLATION MllSDAY
39. INSTALLATION OF ENGINE ASSEMBLY When mounting the engine, check to be sure that thecables, hoses, harness connectors, etc. are all in the
correct position.
33. INSTALLATION OF AIR CONDITIONING
COMPRESSOR/32. POWER STEERING OIL PUMP
Adjust belt tension. (Refer to P.l l-61.)
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ENGINE - Camshaft and Camshaft Oil Seals
zI?mo”e the rocker arms.
Install new camshafts using the following procedure.
(2) Lay the camshafts on the cylinder head and install the bearing caps.
(3) Check that the camshaft can be easily turned by
hand.
(4) After checking, remove the bearing caps and the camshafts, and install the rocker arms.
3iF-Dowel Din
(2) The camshaft’s dowel pins should be at the positions
shown in the figure.
Intake.side
17./16./15./14. INSTALLATION OF CAMSHAFT BEARING
CAPS
Tighten the bearing cap installation bolts to the specified
torque in two or three steps.
Caution
Tighten uniformly, otherwise the rocker arms will not be straight.
ADDIY a coatioi ‘oil to the outer
circumferenceCahshaft
Mating markat plate side/
at hoising sidellA0361(3) Check that the ignition timing is set at the standard
value. (Refer to GROUP
16-Ignition system.)
TSB Revision 13. INSTALLATION OF CAMSHAFT OIL SEALS
Using the special tool, press in the oil seal as shown in the
figure.
10. INSTALLATION OF THE CRANKSHAFT POSITIO
N
SENSOR
(1) Align the mating mark (punch mark) on the housing of
the crankshaft position sensor with the mating mark(notch) in the plate.
(2) Install the crankshaft position sensor to the engine.
Caution
When tightening the nut of the crankshaft posi-
tion sensor, make sure that the crankshaft posi-
tion sensor does not turn.

11-72
ENGINE - Oil Pan and Oil Screen
1
OlR0606
Sealant
Groove 4 m
m
(.I 6
in.)
p4L
cut off
-01 BOOS1e
SERVICE POINTS OF REMOVALMllHBAFl
9. REMOVAL OF OIL PAN
(1) Remove the oil pan mounting bolts.
(2) Tap the general service tool in between the cylinder block and the oil pan.
Caution
Do not use a screwdriver, a chisel or a similar tool
when removing the oil pan.
(3) Remove the oil pan by placing a brass bar at the corner of the general service tool and then tapping with a
hammer.
INSPECTIONMllHCACl
lCheck the oil pan for damage and cracks. Replace if faulty.
l Check the oil screen for clogging; damage and cracks.
Replace if faulty.
SERVICE POINTS OF INSTALLATIONMllHDAOl
9. INSTALLATION OF OIL PAN
(1) Use a wire brush or other tool to scrape clean all gasket surfaces of the cylinder block and oil pan so that all
loose material is removed.
(2) Gasket surfaces must be free of oil and dirt.
(3) Apply the specified sealant around the surface of the
oil
pan as specified in illustration.
Specified sealant: MITSUBISHI GENUINE PART
No.MD970389 or equivalent
NOTE
To squeeze out proper amount of sealant, cut off the
nozzle of sealant. This will provide a nozzle 4 mm
(.I6
in.) in diameter.
(4) The sealant should be applied in a continuous bead approximately 4 mm
(.I6 in.) in diameter.
1 TSB Revision