Mitsubishi Montero Sport (2004+). Manual - part 134

TIMING BELT

TSB Revision

ENGINE OVERHAUL

11B-11

4. Line up the timing marks of the crankshaft sprockets.
5. Install the timing belt on each sprocket in the following 

sequence.

(1) Install the timing belt on the crankshaft sprocket and then 

on the idler pulley, while tightening it to prevent 
slackness.

(2) Install the timing belt on the left bank camshaft sprocket.
(3) Install the timing belt on the water pump pulley, while 

taking up the slack.

(4) Install the timing belt on the right bank camshaft sprocket.
(5) Install the timing belt on the tensioner pulley.

6. Lightly press the tensioner pulley against the belt and 

temporarily tighten the center bolt.

7. Check to see that the timing marks of all the sprockets are in 

alignment.

8. Using special tool MD998769, rotate the crankshaft a 

quarter of a turn counterclockwise. Then rotate it back 
clockwise to verify that all the timing marks are in alignment.

AKX01375

CRANKSHAFT SPROCKET

TIMING MARKS

AB

AKX01376

AB

TENSIONER PULLEY

AK000433

MD998769

AB

TIMING BELT

TSB Revision

ENGINE OVERHAUL

11B-12

9. Mount special tool MD998767 and torque wrench on the 

tensioner pulley.

10.Torque it to 4.4 N

⋅m (39 in-lb) with the torque wrench.

11.While holding the tensioner pulley in position, tighten the 

center bolt to the specified torque.

Tightening torque: 48 

± 6 N⋅m (35 ± 4 ft-lb)

12.Rotate the crankshaft two turns clockwise and leave it alone 

for approximately five minutes.

13.Check to see whether the metal wire inserted when the 

auto-tensioner was installed can be removed without any 
resistance.
If the metal wire can be removed without any resistance, it 
means that the belt has a proper tension. Therefore, remove 
the metal wire. In this condition, check that the projection of 
the rod of the auto-tensioner is within the standard value.

Standard value: 3.8 

− 4.5 mm (0.15 − 0.17 inch)

14.If the metal wire offers resistance when removed, repeat the 

previous steps 9 through 12 until a proper belt tension is 
obtained.

AKX00641

CRANKSHAFT SPROCKET

RIGHT BANK

LEFT BANK

TIMING MARK

WATER PUMP
PULLEY

CAMSHAFT SPROCKET

CAMSHAFT
SPROCKET

IDLER PULLEY

AUTO-TENSIONER

TIMING MARK

AB

TENSIONER PULLEY

AKX01378 AB

MD998767

AKX01379

TIMING BELT

TSB Revision

ENGINE OVERHAUL

11B-13

INSPECTION

M1113002000436

.

TIMING BELT
Replace the belt if any of the following conditions exist.
1. Hardening of rubber backing.

Back side is glossy without resilience and leaves no indent 
when pressed with fingernail.

2. Cracks on rubber back.
3. Cracks or peeling of canvas.
4. Cracks on tooth bottom.
5. Cracks on belt.

6. Abnormal wear of belt sides. Normal wear is indicated if the 

sides are sharp as if cut by a knife. Abnormal wear is 
indicated if the sides are ragged.

7. Abnormal wear on teeth. 

Initial stage:
Canvas worn (fluffy canvas fibers, rubbery texture 
gone, white discoloration, canvas texture indistinct)
Final stage:
Canvas worn, exposing rubber (tooth width reduced)

8. Missing tooth.

.

AKX00749

AKX00713

CRACKS

CRACKS

PEELING

CRACKS

AB

AKX00750

ROUNDED EDGE

ABNORMAL WEAR 
(RAGGED)

AB

AKX00751

RUBBER EXPOSED

TOOTH MISSING AND
CANVAS FIBER EXPOSED

AC

TIMING BELT

TSB Revision

ENGINE OVERHAUL

11B-14

TENSIONER PULLEY AND IDLER PULLEY
Turn the pulley. If it does not rotate smoothly, or develops noise 
or excessive play, replace the pulley.

.

AUTO-TENSIONER
1. Check for oil leaks. If oil leaks are evident, replace the 

auto-tensioner.

2. Check the rod end for wear or damage and replace the 

auto-tensioner if necessary.

3. Measure the rod protrusion. If it is out of specification, 

replace the auto-tensioner.

Standard value: 12 mm (0.5 inch)

4. Press the rod with a force of 98 to 196 N (22 to 44 pounds) 

and measure the movement of the rod.
If the measured value is out of the standard value, replace 
the auto-tensioner.

Standard value: 1.0 mm (0.03 inch) or less

AKX00650

AKX00651

12 mm (0.5 in)

AB

AKX00652

MOVEMENT

98 TO 196 N
(22 TO 44 lb)

AB