15 Cylinder Head, VALVETRAIN: VALVETRAIN: Notes

WARNING: This page is about a different variant/trim than selected.

CAUTION:

Risk of damaging valves and piston heads after working on valve train.

The motor must not be started for about 30 minutes after installing camshafts because the hydraulic equalization elements must seat themselves.
To ensure valves do not strike pistons when starting, carefully rotate engine at least two full revolutions.

NOTE:

Cylinder heads with cracks between the valve seats, or between the valve seat and the spark plug threads, can continue to be used without reducing the service life, as long as the cracks have a width of max. 0.3 mm, or only the first 4 threads of the spark plug threads are cracked.