30/ENGINE - WORK ON THE INDIVIDUAL PARTS
149
20.31
Preparing the timing chain tensioner for installation
200171-10
–
Press the timing chain tensioner together completely.
Info
This requires some force, as the oil must be pressed out.
–
Release the timing chain tensioner.
Without pressure, the timing chain tensioner expands fully.
200172-10
–
Place two spacing washers or similar aids next to the timing chain tensioner piston.
This ensures that, when pressed in, the piston cannot go in all the way.
Guideline
Thickness of the spacing washers
2… 2.5 mm (0.08… 0.098 in)
–
Release the timing chain tensioner.
The detent mechanism engages and the piston remains in place.
Final position of the piston after
engagement
3 mm (0.12 in)
Info
This position is necessary for installation.
If the timing chain tensioner is now pressed again and is only extended a
maximum of half way (it is prevented from extending completely). This locks
the detent mechanism and the timing chain tensioner can no longer be
squeezed together. This function is necessary in order to ensure sufficient
timing chain tension even at low oil pressures.
20.32
Checking the clutch
304690-10
–
Check the pressure piece
1
for damage and wear.
» If there is damage or wear:
–
Change the pressure piece.
–
Place push rod
2
on a level surface and check for run-out.
» If there is run-out:
–
Change the push rod.
–
Check spring retainer
3
for damage and wear.
» If there is damage or wear:
