17 ENGINE
17.4.27 Checking the valves
Info
Press the small camshaft bearing in until flush using special
tool
8.
I Pressing tool (75029044020) (
�
p. 297)
Press the large camshaft bearing in all the way using special
tool@).
Pressing tool (75029044010) (
!,JI
p. 297)
The valve stem is hard-chrome plated; wear generally appears at the valve guide.
302808-10
204
- Check the valve plate for run-out.
Valve
Run-out at valve plate
s; 0.05 mm (:5 0.002 in)
If the measured value does not meet specifications:
Change the valve.
- Check sealing seat
6)
on valve for damage and wear.
If the sealing surface is damaged or worn:
Machine the valve seat.