Checking Valve Clearance - Vetus M3.28 Operation Manual

4 Maintenance
27 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.
34
VD01123
28 Remove rocker cover
Remove the 2 nuts 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.
Mark on gear-
case
17°
14
VD00149
29 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.
TDC mark
Injection timing
mark
27