Operating instructions

7. Tighten locknut (2) to 35 Nm +5 Nm, hold-
ing valve bridge (1) in position with open-
end spanner.
8. Check valve bridge balance again.
9. Adjust valve-bridge balance at two crank-
shaft positions according to the following
diagram.
Checking valve clearance at two
crankshaft positions
1. Check TDC position of piston in cylinder
A1:
• If the rocker arms are unloaded on cylin-
der A1, the piston is in firing TDC.
• If the rocker arms are loaded 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 at two crank-
shaft 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.
72 | Task Description | M015675/06E 2013-04
TIM-ID: 0000004355 - 001