7.
Tighten locknut (2) to 35 Nm +5 Nm, hold‐
ing valve bridge (1) in position with open-
end spanner.
8.
Re-check valve bridge balance.
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 unloaded 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 cold engine:
• 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 gauge 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.
126 | Task Description | MW15412/05E 2011-11
TIM-ID: 0000004352 - 003
