4. Rotate crankshaft with barring gear in engine
direction of rotation until “OT-A1” mark and
pointer are aligned.
Diagram for 8V engines (two
crankshaft positions)
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
Checking valve clearance at two crankshaft positions
1. Check TDC position of piston in cylinder A1:
• The piston is in firing TDC when the rocker arms on cylinder A1 are unloaded.
• The piston is in overlap TDC when the rocker arms on cylinder A1 are loaded.
2. Check valve clearance setting with engine cold:
• Inlet valves (long rocker arm) = 0.2 mm
• Exhaust valves (short rocker arm) = 0.5 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. Adjust valve clearance if the deviation from the set value exceeds 0.1 mm.
182 | Task Description |
MS150109/01E 2015-11
TIM-ID: 0000012225 - 005
To Next Page
