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17
ENGINE
17.4.30
Checking the rocker arm shafts
17.4.31
Installing the valves
-
Using a straightedge and the special tool, check the sealing area of the cylinder
for distortion.
I
Feeler gauge (590290411 00)
Cylinder/cylinder head - sealing area
distortion
If the measured value does not meet specifications:
-
Change the cylinder head.
-
Check sealing seat
Valve
Intake sealing seat width
Valve
Exhaust sealing seat width
If the measured value does not meet specifications:
-
Rework the valve seat.
302808-10
-
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.
306609-10
-
Position valve spring seats
-
Mount the valves according to their normal built-in position.
-
Mount the springs and spring retainers
-
Pretension the valve springs using the special tool.
Valve spring mounter (59029019000)
Insert for valve spring lever (77029041200)
(�
p. 229)
:5 0.10 mm (:5 0.0039 in)
f)
of the valves.
2.00 mm (0.0787 in)
2.00 mm (0.0787 in)
O.
Mount the new valve stem seals @.
@).
(�
p. 229)
(�
p. 232)
160
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