Checking valve clearance at two
crankshaft positions
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
1. Check TDC position of piston in cylinder A1:
• If the rocker arms are not under load on cylinder A1, the piston is in firing TDC.
• If the rocker arms are under load on cylinder A1, the piston is in overlap TDC.
2. Check valve clearance with the engine cold:
• Inlet = 0.4 mm;
• Exhaust = 0.6 mm;.
3. Check all valve clearances in two crankshaft positions (firing TDC and overlap TDC of cylinder A1) as
per diagram.
4. Use feeler gage to determine the distance between valve bridge and rocker arm.
5. If the deviation from the set value exceeds 0.1 mm, adjust valve clearance.
116 | Task Description | MS150031/03E 2011-10
TIM-ID: 0000004360 - 003
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