Tightening method of the belt drive sprocket fixing bolt

Note: A repair kit is gradually introduced to fasten the poly-V-belt drive gear.

Note: The repair kit will include one support sleeve and two washers of various inner diameters with diamond coating. Both of these washers prevent the crankshaft from turning when the mounting bolt is tightened.

Note: Always use a new mounting bolt before installing a repair kit. The support sleeve may be reused.

Note: Using a repair kit.

Repair kit with fixing bolt

See fig. 2.22.

Work order

Open the wire guides and disconnect the plug from the EGR valve.




Unscrew the bolts 1 and remove the plug 2 of the exhaust camshaft (pic. 2.23).

Rotate the crankshaft in the direction of engine rotation to the TDC of the first cylinder.



Mark the position of the hole in the exhaust camshaft 1 and on the camshaft housing 2 with a colored pencil (pic. 2.24).

Note: Check that the mating surfaces from the mounting bolt to the crankshaft sprocket are free of oil and grease.

First fit support sleeve 3 and washer 2 (inner diameter 23 mm) on fixing bolt 1.

Screw the fixing bolt 1 about 2 turns into the crankshaft.



Then put washer 2 and support sleeve 3 on the crankshaft journal until it stops (pic. 2.25).


Unscrew the fixing bolt (while pressing the support sleeve against the crankshaft).

Install a new crankshaft oil seal on the side of the belt pulley.



Screw in a new fixing bolt 1 with the V-ribbed belt drive gear 2 and washer 3 (inner diameter 19 mm) in the neck of the crankshaft (pic. 2.26).

Always use a new bolt.

The new fixing bolt can be identified by the drilled head.

Note: When tightening, do not accidentally turn the poly-V-belt drive gear by an angle (180°) key for fixation.

Tightening torque 150 Nm + tighten 1/2 rev. (180°).

Hold the serpentine belt drive gear with a wrench.

Check the position of the exhaust camshaft.

Both marks 1 and 2 must match.

If both marks 1 and 2 do not match, repeat the operations with a new washer (pic. 2.24).