Adjusting The Valve Clearance - Mercedes-Benz OM 904 LA Operating Instructions Manual

Maintenance
Work schedules

Adjusting the valve clearance

5
Layout of cylinders and valves
= intake valve
= exhaust valve
X
= flywheel end
74
Special tools
Turning tool 904 589 04 63 00
Valve adjustment tool 422 589 00 11 00
Valve clearance
Intake valves =
0.40 mm
Exhaust valve =
0.60 mm
i
Adjust the valve clearance when the
engine is cold (at least 30 minutes after
stopping the engine, even if it was only
operated for a brief period).
Clean very dirty cylinder head covers
before removal.
Risk of accident
If not properly secured, a vehicle might acci-
dentally be set in motion, knocking some-
body down or trapping them or causing an
accident and injuring you or others.
Always prevent the vehicle from rolling
away by applying the parking brake and,
if necessary, by placing chocks under
the wheels.
Shift the transmission into neutral.
Only turn the engine over using the rota-
tion device provided for this purpose.
G