1989 MITSUBISHI GALANT Service Repair Manual

ENGINE - Timing Belt
11-39
Crankshaft
sprocket
F,a,!,ge Crankshaft
6EN272
0180047
Crankshaft
sprocket “B”
tensioner . ADJUSTMENT OF TIMING BELT “B” TENSION
(1) Temporarily fix the timing belt “B”
tensioner such that
the centre of the tensioner pulley is to the left and
above the centre of the installation bolt, and temporari-
ly attach the tensioner pulley so that the flange is
toward the front of the engine.
(2) Holding the timing belt “B” tensioner up with your finger in the direction of the arrow, place pressure on
the timing belt so that the tension side of the belt is
taut. Now tighten the bolt to fix the
tensio,ier.
Caution
When tightening the bolt, ensure that the tensioner pulley shaft does not rotate with the bolt. Allowing
it to rotate with the bolt can cause excessive
tension on the belt.
(3) To ensure that the tension is correct, depress the belt (point A) with a finger.
If not, adjust.
Standard value: 5-7 mm (.20-.28

in.)
24. INSTALLATION OF FLANGE
Install the flange in correct direction as shown.
18. INSTALLATION OF TIMING BELT
TENSIONER/
17. TENSIONER
SPRING/lG. TENSIONER SPACER
(1) Install the tensioner spring, tensioner spacer and
timing belt tensioner.
(2) Place the upper end of the tensioner spring against the water pump body.
1

II-40ENGINE - Timing Belt
OlRO372
1(3) Move tensioner fully toward water pump and tempo-rarily secure tensioner.
Timing mark Timing mark
(on cylinder head)
Timing mark
“1(on front case) ,A.
Timing mark6EN063
3ENOO5
Tensiorof belt-I sid
e
Tension side of belt
6EN0065
20. INSTALLATION OF TIMING BELT
(1) Ensure that the timing marks of the camshaft sprock- et, the crankshaft sprocket, and the oil pump sprocket
are all aligned.
(2) When aligning the timing mark of the oil pump sprocket, remove the plug of the cylinder block; then
insert the shaft of a cross-tip
(+) screwdriver with a
shaft diameter of 8 mm
(.31 in.) into the plug hole and
check to be sure that the screwdriver’s shaft can be
inserted at least 60 mm (2.36 in.). Do not remove the
screwdriver until the timing belt is completely at-
tached.
If the screwdriver’s shaft can be inserted only to a
depth of about 20 to 25 mm
(.79 to .98 in.) because it
contacts the silent shaft, turn the sprocket by one rotation and align the timing mark once again; then
check again to be sure that the screwdriver’s shaft can be inserted at least 60 mm (2.36 in.).
(3) Install timing belt. While making sure that tension side
of belt is not slackened, install timing belt onto
crankshaft sprocket, oil pump sprocket and camshaf
t
sprocket in that order.
Caution
If the timing belt is reused, install so that the arrow
marked on it at the time of removal is pointing in
the clockwise direction.
l ADJUSTMENT OF TIMING BELT TENSION
(1) Loosen tensioner mounting bolt. By so doing, tension- er will be moved by spring and will apply tension to
belt.
(2) Recheck to be sure that each sprocket’s timing mark iscorrect.
1 TSB RevisionI

ENGINE - Timina Belt11-41
I
I
(3) Turn the crankshaft clockwise by two teeth of the
camshaft sprocket.
Caution
As the purpose of this procedure is to apply the
proper amount of tension on the timing belt, be sure
not to rotate the crankshaft counter-clockwise or
place pressure on the belt to check the amount of
tension.
Tensioner
spacer
OlR0404
(4) Apply force on tensioner toward turning direction, (inthe direction of the arrow) such that no portion of the
belt raises out in portion A, place the belt on the
camshaft sprocket such that the belt sprocket teeth
are fully engaged.
(5) Tighten the tensioner installation bolt and tensioner spacer in that order.
Caution
If the tensioner spacer is tightened first, the ten-
sioner will rotate with it and belt tension be thrown
out of adjustment. Always tighten the bolt first.
TSB Revision
(6) Check to see that the clearance between the outside of the belt and the cover are within the standard value
by grasping the tension side (between the camshaft
sprocket and oil pump sprocket) of the centre part of
the timing belt between the thumb and index finger.
Standard value: 14 mm
(.55 in.)
6 x 20(23 x .78)
6 x 20(23 x .78)
6 x 25t.23 x ,981
11. INSTALLATION OF TIMING BELT FRONT LOWER COV- ER/9.
TIMING BELT FRONT UPPER COVER
Note that the timing belt lower and upper cover attaching
bolts differ in size from one place to another.
Bolt diameter
x length
mm (in.)6x 20t.23 x ,781011672

11-42
ENGINE - Timing Belt
TIMING BELT
REMOVAL AND INSTALLATION
MIlKA-A
Pre-removal Operation
l Removal of under cover
8-10 Nm6-7 ftlbs.
4
’‘\ 50-65
Nm
36-47
ft.lbs.\
IO-12 Nm7-9 ftlbs.
\
\
ft.lbs.’3Q ’23-27 Nm
17-20 ft.lbs.
Removal steps
1.
2.
Clamp for
pressure
hose (power steering)
and high pressure hose (air conditioning) Engine mount bracket
Drive belt (generator) Drive belt (power steering)
Tensioner pulley bracket Drive belt (air conditioning)
Water pump pulley Crankshaft pulley
Timing belt front upper cover
Timing belt front lower cover
Auto tensioner
Timing belt OlA0677
::5.6.
i:9.10.11.
12.
13.14.Tensioner pulley
Tensioner arm
15.
::16.
17.
18.
19.
20.
21.
22.
4*23.
24.
25.
27.
28.
29.
idle pulley
Camshaft sprocket
Oil pump sprocket
Crankshaft sprocket bolt
Special washer Crankshaft sprocket
FlangeTiming belt tensioner “B”
Timing belt “B”
Right silent shaft sprocket Spacer
Kky
Engine support bracket bolt
Timing belt under cover
P
TSB Revision

ENGINE - Timing BeltII-43
+/@Service Adjustment Procedures
24?5
20-;7 Nmio
14-20 ft.lbs.\ is\ i7
Nm50-60 Nm80-94 ft.lbs.36-43 ft.lbs.
Installation steps
29. Timing belt under cover
l +28. Engine support bracket bolt
27. Keyea26. Crankshaft sprocket “6”l +25. Spacer24. Right silent shaft sprocket
22. Timing belt tensioner “B”
l +23. Timing belt
“B”l *Adjustment of timing belt “B” tension1)421. Flangel +20. Crankshaft sprocket19. Special washer
18. Crankshaft sprocket bolt
17. Oil pump sprocket
16. Camshaft sprocket
15. Idle pulley
l al
1. Auto tensioner
14. Tensioner arm 1)+13.
Tensioner pulley
ftlbs.
OlAO682
l +I 2. Timing beltl *Adjustment of timing belt tension
l 41 0. Timing belt front lower cover
I)+ 9. Timing belt front upper cover 8. Crankshaft pulley
7. Water pump pulley
6. Drive belt (air conditioning) (Refer to
P.ll-12.)5. Tensioner pulley bracket
4. Drive belt (power steering) (Refer to
P.l l-l 2.)3. Drive belt (generator) (Refer to P.l l-l 2.)
2. Engine mount bracket
I. Clamp for pressure hose (power steering) and high pressure hose (air conditioning)
TSB Revision

ENGINE - Timing Belt
A Timing
mark
Timingmark
mark
-/Crank&aft swocketOlA0667 lEN0017SERVICE POINTS OF REMOVAL
MllKBDG
2. REMOVAL OF ENGINE MOUNT BRACKET
(1) With a wooden block placed against the oil pan part ofthe engine, jack up the vehicle.
Caution
Jack up gently, so as not to apply a load to the va-
rious parts.
(2) Remove the engine mount bracket.
11. REMOVAL OF AUTO TENSIONER
(1) Turn the crankshaft clockwise and align the timing marks so as to bring the
No.1 cylinder to compression
top-dead-centre position. At this time the timing marks of the camshaft sprocket
-and the upper surface of the cylinder head should coin- cide, and the dowel pin of the camshaft sprocket
should be at the upper side.
Caution
The crankshaft must always be rotated clockwise.
(2) Remove the auto tensioner.
12. REMOVAL OF TIMING BELT
Make a mark on the back of the timing belt indicating the
direction of rotation so it may be reassembled in the same
direction if it is to be reused.
Caution
Water or oil on the belt shorten its life drastically, so
the removed timing belt, sprocket, and tensioner must be free from oil and water. These parts should
not be washed. Replace parts if seriously contami-
nated.
If there is oil or water on each part check the front
case oil seals, camshaft oil seal and water pump for
leaks.
16. REMOVAL OF CAMSHAFT SPROCKET
(1) Rotate the crankshaft in the forward (right) direction
and align the timing mark.
Caution
The crankshaft must always be rotated in the for-
ward direction only.
TSB Revision

ENGINE - Timinn Belt
11-45
sprocket
vlGVO001 MD998754
vlB990767-01
-
&
00B00°
(2) Tie the camshaft sprocket and timing belt with a cord
so that the position of the camshaft sprocket will not
move with respect to the timing belt.
(3) Use the special tool to remove the camshaft sprocket with the timing belt attached.
Caution
After removing the camshaft sprocket, be sure not
to rotate the crankshaft.
17. REMOVAL OF OIL PUMP SPROCKET
(1) Remove the plug on the side of the cylinder block.
(2) Insert a Phillips screwdriver [shank diameter 8 mm
(31
in.)] to block the left silent shaft.
(3) Remove the oil pump sprocket nut.
(4) Remove the oil pump sprocket.
23. REMOVAL OF TIMING BELT “B”
Make a mark on the back of the timing belt indicating the
direction of rotation so it may be reassembled in the same
direction if it is to be reused.
Caution
Water or oil on the belt shorten its life drastically, so
the removed timing belt, sprocket, and tensioner
must be free from oil and water. These parts should
not be washed. Replace parts if seriously contami-
nated.
If there is oil or water on each part check the front
case oil seals, camshaft oil seal and water pump for
leaks.
INSPECTIONMl 1 KCAD
TIMING BELTS
The timing belts must be checked closely. Should the following
defects be evident, replace the belt with a new one.
(1) Hardened back surface rubber Glossy, non-elastic, and so hard that no mark is produced
even when scratched by a fingernail.
\ TSB RevisionI

. .CrackII-46ENGINE - Timing Belt
(2) Cracked back surface rubber.
(3) Cracked or separated canvas.
(4) Cracked tooth bottom.
(5) Cracked side.
Separation
Crack
’7EN207
Rounded belt side
Abnormal wear (fluffy canvas fiber)
7EN208
Rubber
exposed
Tooth mlsslng
and
canvas fiber exposed
7EN209
6EN0159
c \/Ga//
@E3%00
t 6EN0280(6) Abnormal wear on side.
NOTE
Normal belt should have clear-cut sides as if cut by a sharp
knife.
(7) Abnormal wear on teeth.
Initial stage:Canvas on load side tooth flank worn (Fluffy canvas fib-
ers, rubber gone and color changed to white, and un-
clear canvas texture)
Final stage: Canvas on load side tooth flank worn down and rubber
exposed (tooth width reduced)
(8) Missing tooth.
TENSIONER PULLEY AND IDLER PULLEY
(1) Turn the pulleys to check for possible binding, excessive
play, and unusual noise. Replace the pulley if any of these
defects is evident.
(2) Replace if there is a grease leak.
AUTO TENSIONER
(1) Check the auto tensioner for possible leaks and replace as
necessary.
(2) Check the rod end for wear or damage and replace as necessary.
TSB Revision