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3.
Release adjusting screw (1) and remove valve
bridge. Do not remove rocker arm (2).
4.
Measure distance (A) between valve stem
end and cylinder head top at the injector
bore with depth gage.
• The specified value for a new cylinder
head: 93.8 mm.
• Admissible wear: 2 mm.
• Have the affected cylinder head replaced
by expert personnel ahead of schedule if
the measured value is > 95.8 mm.
5.
Install valve bridge.
6.
Adjusting valve clearance (→ Page 236)
Step 2 optional: Measure valve protrusion at the valve stem with measuring
jig 2
1.
Check TDC position of piston in cylinder A1:
• If rocker arms on cylinder A1 are unloaded, the piston is in firing TDC.
• If rocker arms on cylinder A1 are loaded, the piston is in overlap TDC.
2.
Measure valve stem end to cylinder head top distance for each valve in two crankshaft positions (firing TDC
and overlap TDC) according to the diagram. Diagram (→ Page 236).
MS15038/01E 2018-11 | Valve Drive | 233
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