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REMOVAL AND INSTALLATION
 
 
Pre-removal Operation
  • Engine Room Under Cover Front A, B and Engine Room Side Cover (RH) Removal (Refer to GROUP 51 - Under Cover ).
Post-installation Operation
  • Drive Belt Tension Check (Refer to ).
  • Engine Room Under Cover Front A, B and Engine Room Side Cover (RH) Installation (Refer to GROUP 51 - Under Cover ).
Removal steps
<<A>>>>B<<1.Drive belt
<<B>>>>A<<2.Crankshaft pulley center bolt
<<B>>>>A<<3.Crankshaft pulley washer
<<B>>>>A<<4.Crankshaft pulley

    Required Special Tools:
  • MB990767: Front Hub and Flange Yoke Holder
  • MD998719: Pin
 
 
REMOVAL SERVICE POINTS
 
 
<<A>> DRIVE BELT REMOVAL
To introduce the serpentine drive system with the auto-tensioner, the following operations will be required.
1.
warningBe sure to set the tool to the hexagonal part securely to prevent the tool from falling off because the tension of the auto-tensioner is high.
Securely set the tool to the hexagonal part of the auto-tensioner.
2. Rotate the auto-tensioner counterclockwise.
3. Insert the L-shaped hexagon wrench into the auto-tensioner hole to fix the auto-tensioner.
4.
cautionTo reuse the drive belt, draw an arrow indicating the rotating direction on the back of the belt using chalk to install the same direction.
Remove the drive belt.
 

 
 
<<B>> CRANKSHAFT PULLEY CENTER BOLT/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY REMOVAL
1.
cautionInsert the special tool pins deep into the position shown in the figure to hold the special tool without interfering with the protrusion of the timing chain case.
Hold the crankshaft pulley with special tools MB990767 and MD998719.
2. Loosen the crankshaft pulley center bolt and remove the crankshaft pulley center bolt, crankshaft pulley washer and crankshaft pulley.
 
 
 
 
INSTALLATION SERVICE POINTS
 
 
>>A<< CRANKSHAFT PULLEY/CRANKSHAFT PULLEY WASHER/CRANKSHAFT PULLEY CENTER BOLT INSTALLATION
1. Wipe off the dirt on the crankshaft sprocket, crankshaft and crankshaft pulley as shown in the figure using a rag, and then degrease the areas.
noteDegrease them to prevent drop in the friction coefficient of the pressed area which is caused by oil adhesion.
2. Install the crankshaft pulley.
3. Wipe off the dirt on the crankshaft pulley washer and the crankshaft pulley center bolt as shown in the figure using a rag.
4. Apply an adequate and minimum amount of engine oil to the thread of the crankshaft pulley center bolt and the lower area of the flange.
5.
cautionInsert the special tool pins deep into the position shown in the figure to hold the special tool without interfering with the protrusion of the timing chain case.
Hold the crankshaft pulley with special tools MB990767 and MD998719 in the same manner as removal.
6. Tighten the crankshaft pulley center bolt to the specified torque.
Tightening torque: 210 N·m (155 ft-lb)
7. Loosen the crankshaft pulley center bolt fully.
8. Tighten the crankshaft pulley center bolt to the specified torque again.
Tightening torque: 210 N·m (155 ft-lb)
 

 
 
>>B<< DRIVE BELT INSTALLATION
1.
caution
  • To reuse the drive belt, install it by aligning the arrow mark on the backside of belt marked at the removal with the rotating direction.
  • Check that the notches of the notched pulley and the notches of the drive belt are fit correctly.
  • Check that the drive belt is installed in the center of the flat surface of the flat pulley.
Install the drive belt to each pulley as shown in the figure.
2.
warningBe sure to set the tool to the hexagonal part securely to prevent the tool from falling off because the tension of the auto-tensioner is high.
Securely set the tool to the hexagonal part of the auto-tensioner.
3. Rotate the auto-tensioner counterclockwise and remove the L-shaped hexagon wrench fixing the auto-tensioner.
4. Apply tension to the drive belt while slowly turning the auto-tensioner clockwise.