3.
Check all valve clearances at two crankshaft positions (firing TDC and overlap TDC) according to the
table below.
Position
Cylinder
1
2
3
4
5
6
7
8
9
10
16 V
Firing TDC in cylinder A1
Bank A
I X – X – X I – – X I –
– – – –
Bank B
I – – X – –
I –
I X
I –
I X – X
Overlap TDC in cylinder A1
Bank A
– –
I –
I – – X I – – X I X
I X
Bank B
– X I –
I X – X – – – X – –
I –
18 V
Firing TDC in cylinder A1
Bank A
I X
I – – X I – – X – – – X – – – –
Bank B
– X – X – – I X – – I X
I –
I X
I –
Overlap TDC in cylinder A1
Bank A
– – – X I – – X I –
I X
I –
I X
I X
Bank B
I –
I –
I X – – I X – – – X – – – X
I
Inlet: Inlet valve adjustment admissible
X
Exhaust: Exhaust valve adjustment admissible
–
Exhaust valve adjustment not allowed
4.
Use valve clearance gage 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
1.
Loosen locknut (1) and unscrew adjusting
screw (2) by a few threads.
2.
Insert valve clearance gage between valve
bridge and rocker arm (3).
3.
Readjust adjusting screw (2) so that the
valve clearance gage just passes through
the gap.
4.
Tighten locknut (1) to specified torque using a torque wrench, holding the adjusting screw (2) with an
offset screwdriver to prevent it from turning.
Name
Size
Type
Lubricant
Value/Standard
Locknut
M12
Tightening torque
50 Nm + 5 Nm
5.
Check if the valve clearance gage just passes through between valve bridge and rocker arm (3).
Result:
If not, adjust valve clearance.
Final steps
1.
Remove barring gear.
2.
Install cylinder head cover (→ Page 50).
MS150117/01E 2014-10
| Task Description | 49
TIM-ID: 0000050908 - 002
