Man D 2866 LUE 602, Repair Manual

Page: 107 / 174

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Checking the valve timing
105
Note:
Unsynchronised valve timing can cause
severe engine damage.
For this reason, following engine faults
that can cause twisting of the shrunk-on
camshaft toothed wheel, the correct sea-
ting must be checked by checking the
valve timing.
This check is also recommended after
the camshaft is fitted.
Fig. 1
Remove the cylinder head cover from the 1st cylin-
der.
Set the valve clearance of the 1st cylinder cor-
rectly.
Fig. 2
Turn the engine using the barring gear until the
valves of the 1st cylinder overlap.
Turn the engine back to approx. 50
_
before “TDC”,
then turn forwards to 30
_
before “TDC” again.
- Note the degree marking on the flywheel -
Fig. 3
Place the dial gauge with approx. 2 mm initial ten-
sion on the valve-spring pocket of the outlet valve
on the 1st cylinder and set to “0”.
Turn the engine in the running direction by 180
_
.
- The outlet valve is then fully closed -
Read the stroke of the valve on the dial gauge.
The valve stroke must lie between 5.5 and 6.0
mm.