302808-10
17.4.33 Checking the rocker arm shafts
306609-10
17.4.34 Installing the valves
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-8
310048-10
ENGINE 17
Check the sealing area of the cylinder for distortion using a
straight edge and the special tool.
I
Feeler gauge (59029041100) (
8
p. 299)
Cylinder/cylinder head -
sealing area distortion
:;; 0.10 mm (:;; 0.0039 in)
If the measured value does not meet specifications:
- Change the cylinder head.
Check sealing seat width
f)
of the valves.
Valve
Intake sealing seat width 2.00 mm (0.0787 in)
Valve
Exhaust sealing seat
width
12.00 mm (0.0787 in)
If the measured value does not meet specifications:
Machine the valve seat.
Blow compressed air through all oil channels and check that
they are clear.
Check the rocker arm shafts for damage and wear.
If there is damage or wear:
- Change the rocker arm shafts.
Position valve spring seats
Q.
Mount the new valve stem
seals
8.
Mount the valves according to their normal built-in position.
Mount the springs and spring retainers (D.
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209