MITSUBISHI GALANT 1989 Service Workshop Manual

11-I
CONTENTSM11AA-
ENGINE
<DOHC
>
........................
53
CAMSHAFT AND CAMSHAFT OIL
SEALS..........................................68
CYLINDER HEAD GASKET
.................73
ENGINE ASSEMBLY
.........................63
OIL PAN AND OIL SCREEN ...............71
SERVICE ADJUSTMENT
PROCEDURES................................
57
Basic
Idle Speed Adjustment
...........................
.
Refer to GROUP 13
Compression Pressure Check ..............
59
Curb- Idle Speed Adjustment_.___..__._____....___._....Refer to GROUP 13
Dash Pot Inspection and Adjustment 58
Drive Belts Tension Adjustment . 6
1
Engine Oil Check . . .
_. _. . . _. . . . . . . 57
Ignition Timing Adjustment
__..._.__...................Refer to GROUP 16
Lash Adjusters Check ......................
.
57
Manifold Vacuum Inspection
..............
.
60
SPECIAL TOOLS.............................56
SPECIFICATIONS
............................53
General Specifications .....................
.
53
Sealants and Adhesives ....................
56
Service Specifications......................
.
53
Torque Specifications
......................
.
54
TIMINGBELT.................................80
TROUBLESHOOTING
........................56
E,NGINE <SOHC>. . . . . . . . . . ..m...........2
CAMSHAFT AND CAMSHAFT OIL
SEAL. . . . . . . . . . . . . . . . . . . ..*............ . . . . . . . . . .19
CYLINDER HEAD GASKET..................25
ENGINE ASSEMBLY.........................14
OIL PAN AND OIL SCREEN. . . . . . . . . . . . . . . .23
SERVICE ADJUSTMENT
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . ..*.......7
Basic Idle Speed Adjustment
. . . . . . . .._......... . Refer to GROUP 13
Compression Pressure Check . .
.
8
Curb Idle Speed Adjustment
.__................ _. . . . Refer to GROUP 13
Drive Belts Tension Adjustment .........
.
12
Engine Oil Check
..........................
.
7
Ignition Timing Adjustment
_...___............... . . . . . Refer to GROUP 16
Lash Adjusters Check . . . . . . . . . . . .
7
Manifold Vacuum Inspection . . . . . . . . . .9
Timing Belt Tension Adjustment . . . .10
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
.5
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
General Specifications _. _.2
Sealants and Adhesives
._ _. . . . . . . .5
Service Specifications . . . .2
Torque Specifications . . . . . . . . . . . . . . . .4
TIMING BELT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . m.. .6
Compression Too Low
Connecting Rod Noise/Main Bearing Noise Excessive Engine Rolling and Vibration
Noisy Valves
Oil Pressure Drop
Oil Pressure Too High
Timing Belt Noise

11-2ENGINE <SOHC> - Specifications
ENGINE <SOHC>
SPECIFICATIONS
GENERAL SPECIFICATIONSMllCA-A
ItemsType
Number of cylinders
Bore
Stroke
Piston drsplacement
Compression ratio
Firing order
Silent shaft
Valve timing
Intake valveOpens (BTDC)
Closes
(ABDC)
Exhaust valveOpens
(BBDC)
Closes (ATDC)
Lubrication Specifications
In-line Single Over Head Camshaft
4
mm (in.) 85 (3.35)
mm (in.) 88 (3.46)
cm3 (cu.in.) 1,997 (121.9)
8.5
<8 VALVE>, 9.5 < 16 VALVE>
1-3-4-2
I Equipped
19”<8VALVE>,11”<16VALVE>
57” <8 VALUE>, 53” <I 6 VALUE>
57”
<8 VALVE>, 63” <I6 VALVE>
19” <a VALVE>, 21” <16VALVE>
Pressure feed-full flow filtration
SERVICE SPECIFICATIONS
MllCB-A
Items Standard Value
Limit
Engine adjustments Engine compression pressure
Engine compression pressure difference
between each cylinder
Intake manifold vacuum-at idle
kPa (psi)/rpm 1,250 (178)/250-400<8 VALVE>1,300 (185)/250-400< 16 VALUE>
kPa (psi) - mmHg

(in.Hg)Approx. 500 (20)<8 VALVE>
Approx. 510 (20)
<16VALUE>
min. 880 (125)/250-400<8 VALUE>min. 980 (139)/250-400< 16 VALUE>
max.
100 (14)
Timing belt “B” tension mm (in.)
5
- 7 (.20-.28)
Cylinder head bolt
< 16 VALUE>mm(in.) -max. 99.4 (3.91)
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ENGINE <SOHC> - SpecificationsII-3
l-
Items
Standard ValueLimit1
Drive belt
For generatorDeflection mm (in.)
Inspection
9.0-l 1.5 (.354-,453)
New belt7.5-9.0 (.295-.354)
Used belt 10 (.394)
TensionN (Ibs.)
Inspection250-500 (55-l IO)
New belt500-700 (11 o- 154)
Used belt 400 (88)
For air conditioning compressor Deflection mm (in.)
Inspection Approx.
8
(.315)
New belt5.0-5.5 (.197-.217)
Used belt6.0-7.0 (.236-,276)
TensionN (Ibs.)
Inspection250-500 (55-l IO)
New belt470-570 (104-I 26)
Used belt
320-400 (71-88)
For power steering pump Deflection mm (in.)
Inspection
6.0-9.0 (.236-,354) iming
belt tension
<8 VALVE>mm (in.)14 (.55)
NOTE
O.D.: Outer Diameter I.D.: Inner Diameter
O.S.: Oversize Diameter
U.S.: Undersize Diameter
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II-4ENGINE <SOHC> - Specifications
TORQUE SPECIFICATIONS Items
Nm ft.lbs.
Engine mount insulator nut (large)
60-8043-58
Engrne mount insulator nut (small)30-4022-29
Engine mount bracket nut and bolt
50-6536-47
Front roll stopper insulator nut
50-6536-47
Front roll stopper bracket to center member
40-5029-36
Rear roll stopper insulator nut
40-5029-36
Rear roll stopper bracket to crossmember
40-5029-36
Transaxle mount insulator nut
60-8043-58
Transaxle mount bracket to body
40-5029-36
Fuel high pressure hose to fuel rail 4-
6
3-4
Accelerator cable adjusting bolt 4-63-4
Front exhaust pipe clamp bolt
30-4022-29
Front exhaust pipe to exhaust manifold
40- 5029-36
Power steering oil pump to bracket 35-4525-33
Air conditioning compressor to bracket 23-27
17-20
Oil pan drain plug35-4526-33
Oilpan6-
8
4-6
Oil screen 15-2211-16
Timing belt cover
IO-127-
9
Cylinder head bolt (Cold engine)
90- 10065-72
Camshaft sprocket
80-10058-72
dater pump pulley bolt8-106-
7
Crankshaft pulley bolt
20-3014-22
Crankshaft sprocket bolt
110-13080-94
Timrng belt B tensioner bolt 15-2211-16
Tension pulley bracket bolt 23-2717-20
Right silent shaft sprocket bolt34-40”’ [43-49]*’ 25-29” [31-351”
Oil sprocket nut pump
50-6036-43
Control wiring harness and intake manifold plenum or air intake manifold\
4-
6
3-4
Front roll stopper bracket bolt 55-75
40-54
Front engine support bracket bolt50-7036-51
Exhaust pipe support bracket bolt
30-4222-30
Left engine support bracket bolt30-4222-30
Rear roll stopper bracket bolt110-13080-94
Front case bolt20-2714-20
Bear cover bolt 5-
7
4-5
Iistributor nutIO-137-
9
Rocker arm and shaft assembly bolt (large) 19-2114-15
?ocker arm and shaft assembly bolt (small)20-2714-20
ntake manifold stay bolt
18-2513-18
-iming belt tensioner spacer and bolt
43-5531-40
NOTE*I: When a 2.0 mm (.08 in.) thick washer is used.~2: When a 2.6 mm (.I0 in.) thick washer is used.
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ENGINE <SOHC> - Specifications/Special Tools
SEALANTS AND ADHESIVESMllCE-A
Items
Specified sealant
Engine support bracket bolt
<I 6 VALVE> 3M
ATD Part
No.8660 or equivalent
MITSUBISHI GENUINE PART No.MD970389
or equivalent
SPECIAL TOOLSMl1 DA-A
ToolNumber
NameUse
6-J MD998306-01
INSTALLER,Installation of camshaft oil seal
camshaft oil seal(8 VALUE>
Q
Use with
MD998307-01
@
MD998307-01
GUIDE, camshaft oil
seal Use with
M D998306-01 MD998713-01
Camshaft oil seal
Installation of camshaft oil seal
6)
installer< 16 VALVE>
67%
MB990767-0 1End yoke holder Supporting camshaft pulley
Supporting crankshaft pulley
< 16 VALVE>
El iis
M D998754
Crankshaft pulley
b.holder pin
fa fii3
B
MD998051 -01WRENCH, cylinder Tightening of cylinder head to block
head bolt<8 VALVE>
OPTIONAL: AVAILABLE FROM O.T.C.
GENERAL
SERVICE TOOLOil pan gasket cutter Removal of the oil pan
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11-6
ToolENGINE <SOHC>
-Special Tools/Troubleshooting
Number
NameUse
M
D998443-01 HOLDER, lashSupporting of the lash adjuster to prevent it
adjuster from falling when rocker shaft assembly
IS
removed or installed MD998752-01
Tension pulley Adjustment of timing belt tension
wrench
<I 6 VALVE>
TROUBLESHOOTINGMHEAAK
Symptom
Compression too low Probable cause
Cylinder head gasket blown Piston ring worn or damage
Piston or cylinder worn Remedy
Replace gasket
Replace rings
Repair or replace piston and/or cylinder
block
Valve seat worn or damage Repair or replace valve and/or seat ring
Oil pressure drop Engine oil level too low Check engine oil level
Oil pressure switch faulty Replace oil pressure switch
Oil filter clogged Install new filter
Oil pump gears or cover worn Replace gears and/or cover
Thin or diluted engine oil Change engine oil to correct viscosity
Oil relief valve stuck (opened) Repair relief valve
Excessive bearing clearance Replace bearings
Oil pressure too high Oil relief valve stuck (closed) Repair relief valve
Noisy valves Incorrect lash adjuster Bleed air or replace lash adjuster
Thin or diluted engine oil (low oil pressure) Change engine oil
Valve stem or valve guide worn or damage Replace valve and/or guide
Connecting rod noise/ Insufficient oil supply Check engine oil level
main bearing noise
Low oil pressure Refer to “Oil pressure drop”
Thin or diluted engine oil Change engine oil
Excessive bearing clearance Replace bearings
Timing belt noise Incorrect belt tension Adjust belt tension
Excessive engine rolling Loose engine roll stopper (Front, Rear)
and vibration Retighten
Loose transaxle mount bracket
Loose engine mount bracket
Loose center member
Broken transaxle mount insulator
Broken engine mount insulator
Broken engine roll stopper insulator Replace
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ENGINE <SOHC> - Service Adjustment Procedures11-7
OlR0340
1
SERVICE ADJUSTMENT PROCEDU$$o
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
viscosity. IASH
ACIJUSTERS CHECKMllFEAGa
NOTE
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
0If the oil amount is small, air will be sucked from the oil
strainer and mixed in the oil passage.
0If the oil amount is excessive, the oil will be stirred by
the crank and mixed with a large amount of air.
0Air 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
ablnormal 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
adjuster is returned to normal.
l
Graclually 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. 0
After 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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II-8ENGINE <SOHC> - Service Adjustment Procedures
8 VALVE
W Tlmlng belt side
il6
16
727
(3) If 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.
@ In the same procedure as Step 0, check the rocker
arm at the area indicated by the
0 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
@ 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.
COMPRESSION PRESSURE CHECK
MllFFAL
(1) Before inspection, verify that the engine oil, starter motor and battery are normal. Then, perform the following.
l Engine coolant temperature:
80- 95°C
(176- 203°F)
l Lights, electric cooling fan and accessories: OFF
l 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 distributor.
NOTE
This will prevent the engine control module from controll- ing the ignition and fuel injection.
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ENGINE <SOHC> - Service Adjustment Procedures 11-9
(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 very dangerous.
MANIFOILD VACUUM INSPECTIONMllFNAC
(6)
(7)
(8)
Set up the compression gauge in the spark plug mounting
hole.
Fully open the throttle valve, and cranking the engine,
measure the compression pressure.
Standard value:
<8VALVE>1,250 kPa (178 psi) [250-400 rpm]
< 1 Ei VALVE>
1,300 kPa (185 psi) [250-400 rpm]
Limit:
(8 VALVE>880 kPa (125 psi) [250-400 rpm]
<lEiVALVE>980 kPa (139 psi)
[250-400 rpm]
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)
(9) If a cylinder’s compression pressure or pressure difference IS 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 distributor.
(11) Install 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
resu,lted from disconnection of the distributor con-
nector.
(1) Before inspection and adjustment, put the vehicle into the
followin~g state.
l Engine coolant temperature:
85-95°C (185-203°F)
l
Ligt-Its, electric, cooling fan, and accessories: OFF
l Transaxle: 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.
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II-IOENGINE <SOHC> - Service Adjustment Procedures
(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:
(8 VALVE>Approx. 500 mmHg (20 in.Hg)
<16VALVE>Approx. 510 mmHg (20 in.Hg)
(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
Symptom
CauseRemed
y
l The vacuum gauge reading is less than l Ignition timing is retarded.l Adjust the ignition timing.
standard value, but the pointer is
stable.
l The vacuum gauge pointer swings l The gas mixture is excessivelyl Check
Multiport Fuel Injection
slowly.rich.system.
l The vacuum gauge pointer drops irre-
l The gas mixture is excessively
l Check
Multiport Fuel Injectiongularly.lean.system.
l The vacuum gauge pointer drops inter-
0 Incomplete close contact of in-0 Check and repair the valve.mittently to 30 to 160
mmHg
(1.2 to take and exhaust valve seats.
6.3 in.Hg).
l The vacuum gauge pointer drops sud-l Broken cylinder head gasketl ,Replace cylinder head gasket. denly
from the normal reading to 250 mmHg
(9.8 in.Hg). then returns to
normal.
/ OlR0175
condition.
Timina mark
‘timing mark._*-
Camshaft sprocket TIMING BELT TENSION ADJUSTMENT
(8 VALVE>MllFGCEa
There are 2 access holes in the timing belt front lower cover.
These can be used to readjust the tension of the timing belt by
the following procedure without removing the timing belt front lower cover. However, timing belt “B”, which drives the right
silent shaft, cannot be adjusted unless the cover is removed. (1) Turn the steering wheel all the way to the left.
(2) Remove the left side undercover panel.
NOTE
This work is done so that the crankshaft can be turned.
(3) Place a piece of wood against the engine oil pan and jac
k
up.(4) Remove the engine mounting bracket.
(5) Remove the timging belt front upper cover.
(6) Remove the four spark plugs.
(7) Turn the crankshaft clockwise and check the timing belt
(8) Turn the crankshaft clockwise and align the timing marks.
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