Valve clearance at two crankshaft positions – Check
1. Check TDC position of piston in cylinder 1, bank A:
• If the rocker arms are unloaded on cylinder 1, bank A, the piston is in firing TDC.
• If the rocker arms are loaded on cylinder 1, bank A, the piston is in overlap TDC.
2. Check valve clearance with cold engine (at max. 40 °C):
• Inlet (E) = 0.3 mm;
• Exhaust (A) = 0.4 mm.
3. Check all valve clearances at two crankshaft positions (firing TDC and overlap TDC) according to the table
below.
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.
Valve clearance – Adjustment
Position Cylinder 1 2 3 4 5 6 7 8 9 10
12V
Firing TDC in cylinder A1 Side A (E)
(A)
(E)
–
–
(A)
(E)
–
–
(A)
– –
Side B (E)
–
– – –
(A)
(E)
–
(E)
(A)
–
(A)
Overlap TDC in cylinder A1 Side A – – –
(A)
(E)
–
–
(A)
(E)
–
(E)
(A)
Side B –
(A)
(E)
(A)
(E)
–
–
(A)
– – (E)
–
16V
Firing TDC in cylinder A1 Side A (E)
(A)
–
(A)
–
(A)
(E)
–
–
(A)
(E)
–
– – – –
Side B (E)
–
–
(A)
– – (E)
–
(E)
(A)
(E)
–
(E)
(A)
–
(A)
Overlap TDC in cylinder A1 Side A – – (E)
–
(E)
–
–
(A)
(E)
–
–
(A)
(E)
(A)
(E)
(A)
Side B –
(A)
(E)
–
(E)
(A)
–
(A)
– – –
(A)
– – (E)
–
(E)
Inlet valve adjustment permissible
(A)
Exhaust valve adjustment permissible
–
Valve adjustment not permissible
Table 3: Valve clearance adjustments
MS150119/01E 2016-02 | Valve Drive | 85
TIM-ID: 0000060076 - 004
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