Valve Gear
11
1
Cylinder A1 is in firing TDC
2
Cylinder A1 is in overlap TDC
I
Inlet valve
X Exhaust valve
Adjusting valve clearance in two crankshaft
positions
1. Check TDC position of piston in cylinder A1:
If the rocker arms are unloaded on cylinder A,
the piston is in firing TDC.
If the rocker arms are loaded on cylinder A,
the piston is in overlap TDC.
2. Check valve clearance with cold engine:
Inlet valves (long rocker arm) = 0.2 mm
Exhaust valves (short rocker arm) = 0.5 mm
3. Check all valve clearances at two crankshaft
positions (firing and overlap TDC for cylinder
A1) as per diagram.
4. Use feeler gauge to determine the distance
between valve bridge and rocker arm.
5. If the deviation from the reference value exceeds
0.1 mm, adjust valve clearance.
M015403/00E 02-09
© MTU
www.generent.ru
Summary of Contents for 12V 4000 G 41
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