Mitsubishi Grandis. Manual — part 640

TIMING BELT

ENGINE MECHANICAL

11A-37

>>B<< BALANCER TIMING BELT
TENSION ADJUSTMENT

CAUTION

When tightening the mounting bolts, ensure that
the tensioner does not rotate with the bolts.
Allowing it to rotate with the bolts can cause
excessive tension of the belt.

1. Lift with your fingers the balancer timing belt

tensioner in the direction of the arrow. Apply a
tensile torque of 3.0

± 0.4 N⋅m to the balancer

timing belt so the belt is tense without any
looseness. Tighten the assembling bolt to the
specified torque in this state. Then, fix the
balancer timing belt tensioner.

Tightening torque: 19

± 3 N⋅m

2. Turn the crankshaft clockwise two turns to set

No.1 cylinder to TDC of its compression stroke
and check that sprocket timing marks are aligned.

3. Apply a pressure of approximately 100 N at the

centre (arrow area) between the sprocket as
shown in the figure, then inspect whether the belt
deflection is within the standard value.

Standard value:

<When adjusting> 5

− 7 mm

<When replacing> 5

− 7 mm

4. If not within the standard value, adjust the belt

tension again.

>>C<< CRANKSHAFT ANGLE SENSING
BLADE/CRANKSHAFT CAMSHAFT
DRIVE SPROCKET/CRANKSHAFT
PULLEY WASHER/CRANKSHAFT
PULLEY CENTRE BOLT INSTALLATION

1. Clean or degrease the crankshaft, the crankshaft

angle sensing blade, the crankshaft camshaft
drive sprocket and crankshaft pulley washer as
shown.

AC301404

AC301402AC

Balancershaft
sprocket

Timing
mark

Crankshaft
balancershaft
drive sprocket

Timing
mark

AC301405AB

Deflection

Approximately 100 N

AC301347

AB

: Clean

: Apply engine oil

: Clean and degrease

Crankshaft camshaft
drive sprocket

Crankshaft pulley
centre bolt

Crankshaft

Crankshaft angle
sensing blade

Crankshaft
pulley washer

Engine front

TIMING BELT

ENGINE MECHANICAL

11A-38

NOTE: Also clean the degreased surfaces.

2. Install the crankshaft angle sensing blade and

crankshaft camshaft drive sprocket in the
direction shown.

3. Place the larger chamfer side of the crankshaft

pulley washer in the direction shown in the Figure
and then assemble on the crankshaft pulley
centre bolt.

4. Apply a small of engine oil to the crankshaft pulley

centre bolt bearing surface and screw.

5. Use the following special tool as during removal to

hold the crankshaft camshaft drive sprocket.

• Special spanner (MB991367)

• Pin (MB991385)

6. Tighten the crankshaft pulley centre bolt to the

specified torque.

Tightening torque: 167 N

⋅m

>>D<< TIMING BELT TENSIONER
ADJUSTER INSTALLATION

1. Set according to the following procedures when

the timing belt tensioner adjuster rod is fully
extended.

CAUTION

If the compression is too fast the procedure may
damage the rod. Make a point to slowly and
thoroughly compress.

(1) Slowly compress the timing belt tensioner

adjuster rod using a press or vice, then align
the set hole A of the rod with set hole B of the
timing belt tensioner adjuster cylinder.

(2) Insert a wire or pin in the set hole aligned.

NOTE: When replacing the timing belt
tensioner adjuster with new parts, the timing
belt tensioner adjuster is set with a pin.

2. Install the timing belt tensioner adjuster to the

engine and then tighten the mounting bolt to the
specified torque. Do not remove the wire or pin
until the tension of the valve timing belt is
adjusted.

Tightening torque: 23

± 3 N⋅m

>>E<< TIMING BELT TENSIONER
PULLEY INSTALLATION

Temporarily tighten the timing belt tensioner pulley
as shown.

AC102332AB

MB991385

MB991367

Crankshaft
camshaft
drive
sprocket

AC302024

A

AB

B

AC302025AB

Wire or pin

AC102336AB

Timing belt tensioner
pulley hole

TIMING BELT

ENGINE MECHANICAL

11A-39

>>F<< VALVE TIMING BELT
INSTALLATION

1. Align the timing marks on the camshaft sprocket,

crankshaft camshaft drive sprocket and engine oil
pump sprocket.

2. Adjust the timing mark of the engine oil pump

sprocket. Unplug the cylinder block plug. Insert a
bolt (M6, section width 10 mm, nominal length 45
mm) from the plug hole. If the bolt comes in
contact with the balancer shaft, turn the engine oil
sprocket one rotation. Re-adjust the timing mark
and then check to see that the bolt fits. Do not
remove the bolt until the valve timing belt is
assembled.

3. Incorporate the valve timing belt in the following

manner so that the tensile force of the belt is not
lax.
(1) Place the valve timing belt on the timing belt

tensioner pulley and crankshaft camshaft
driver sprocket and then support it with your
left hand so it does not slide.

(2) Place the valve timing belt on the engine oil

pump sprocket while pulling it with the right
hand.

(3) Place the valve timing belt on the timing belt

idler pulley.

CAUTION

Incorporate the valve timing belt. Then apply
reverse rotation (anti-clockwise rotation)
pressure to the camshaft sprocket. Re-check to
see that each timing mark is aligned while the
tension side of the belt is right.

(4) Place the valve timing belt on the camshaft

sprocket.

AC301374

AB

Timing mark

Crankshaft
camshaft
drive sprocket

Camshaft
sprocket

Timing mark

Timing mark

Engine oil pump
sprocket

AC301871AB

Bolt

Plug

Cylinder block

Balancershaft

AC301372

AC

Crankshaft
camshaft
drive sprocket

Camshaft
sprocket

Engine oil pump
sprocket

Timing belt
tensioner
pulley

Timing belt
Idler pulley

Belt tension
side

AC301858

MD998767

AB

TIMING BELT

ENGINE MECHANICAL

11A-40

4. Turn the timing belt tensioner pulley in the

direction shown in the figure using special tool
tensioner wrench (MD998767) to apply tension to
the valve timing belt. Then temporarily tighten and
fix the timing belt tensioner pulley mounting bolt.

5. Check that the timing marks are aligned.

6. Remove the bolt inserted in Step 2 above, then

assemble the cylinder block plug.

7. Tighten the cylinder block plug to the specified

torque.

Tightening torque: 30

± 3 N⋅m

8. Adjust the valve timing belt tension.

>>G<< VALVE TIMING BELT TENSION
ADJUSTMENT

1. Set special tool adjusting bolt (MD998738) used

when removing the valve timing belt.

CAUTION

Always screw in the special tool in with your
hands, since use of a spanner or other tools may
damage the wire or pin inserted in the timing belt
tensioner adjuster.
2. Gradually screw in the special tool to a position in

which the wire or pin inserted in the timing belt
tensioner adjuster lightly moves.

3. Turn the crankshaft 1/4 of a revolution in the

anti-clockwise direction.

4. Turn the crankshaft in the clockwise direction,

align each timing mark to set No.1 cylinder to TDC
of its compression stroke.

5. Loosen the timing belt tensioner pulley mounting

bolt.

AC301372

AB

Timing mark

Crankshaft
camshaft
drive sprocket

Camshaft
sprocket

Timing mark

Timing mark

Engine oil pump
sprocket

AC301871AB

Bolt

Plug

Cylinder block

Balancershaft

AC301452AB

MD998738

Timing belt
under cover

AC301372

AB

Timing mark

Crankshaft
camshaft
drive sprocket

Camshaft
sprocket

Timing mark

Timing mark

Engine oil pump
sprocket