34
5
Checking / adjusting valve clearance
Checking the valve clearance must be
done with a cold engine, that is an engine
which did not run for at least 6 hours.
Remove rocker cover
Remove the 2 nuts of the rocker cover.
Complete the following steps:
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.
Checking valve clearance
Every 500 operating hours.
Maintenance
VD00149
Mark on
gearcase
TDC mark
Injection timing
mark
VD01040
10
27
2 C
IL
.: 17°
3 C
IL
.: 19°
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
does not move when the crank pulley is
rotated a little.
340102.04 M2C5D506/M309 EN 14-04-2005 10:35 Pagina 34
