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