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30/ENGINE - WORK ON INDIVIDUAL PARTS
Checking the valves
19.28
A
0 0 A
–
Pre-tension the valve springs using the special tool.
Valve spring compressor (59029019000) (
Insert for valve spring lever (77329060000) (
–
Remove the valve keys and unload the valve springs.
301230-10
–
Remove the valve spring retainer and valve springs.
–
Pull the valve out of the valve guide from below and remove valve stem seal
valve spring seat
301679-10
–
Mark the valves corresponding to their installation position.
Info
Place the valves in a carton corresponding to their installation position and
label them.
300117-10
–
Check the valve plate for run-out.
Valve - run-out
At the valve plate
»
If the measured value does not meet specifications:
–
Change the valve.
200193-10
–
Check sealing seat
Valve - sealing seat width
Intake
Valve - sealing seat width
Exhaust
»
If the sealing seat is not centered on the valve seat or deviates from the specifi-
cation:
400373-10
–
Machine the valve seat.
.
≤ 0.05 mm (≤ 0.002 in)
on the valve.
1.50 mm (0.0591 in)
1.50 mm (0.0591 in)
p. 229)
p. 232)
132
and
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