Checking Valve Clearance - Vetus M4.55 Operation Manual

4 Maintenance
30 Checking / adjusting valve clea-
rance
Checking the valve clearance must be
done with a cold engine, that is an engine
which did not run for at least 6 hours.
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VD01067
31 Remove rocker cover
Remove the 5 bolts of the rocker cover.
Complete the following steps:
Note: There are two TDC's e.g. compres-
sion and suction. At the TDC at the end
of the compression stroke the rocker arm

Checking valve clearance

Every 500 operating hours.
TDC mark
cylinder 1 and 4
TDC mark
cylinder 2 and 3
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VD00130
32 locating TDC
Locate the Top Dead Center (TDC), at the
end of the compression stroke, for cylin-
der 1 by barring the engine slowly until the
TDC marks of the engine block and the
crank pulley match.
does not move when the crank pulley is
rotated a little.
Mark on
gearcase
Injection
timing
mark
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