6.4.2 Valve clearance – Check and adjustment
Preconditions
☑
Engine is stopped and starting disabled.
☑
Engine coolant temperature is max. 40 °C.
☑
Valves are closed.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Feeler gauge
Y20098771
1
Angular screw driver
F30452765
1
Torque wrench, 60–320 Nm
F30452768
1
Socket wrench, 24 mm
F30029815
1
Engine oil
Preparatory steps
1.
Remove cylinder head cover (→ Page 148).
2.
Install barring device (→ Page 129).
3.
Rotate crankshaft with barring tool in en-
gine direction of rotation until TDC marking
and pointer are aligned.
Diagram for 8 V engines – Two crankshaft positions
Position
Cylinder
1
2
3
4
5
6
7
8
9
10
8 V
Firing TDC in cylinder A1
Bank A
I X – X I X – X
Bank B
I X
I –
– –
I –
Overlap TDC in cylinder A1
Bank A
– –
I –
– –
I –
Bank B
– – – X I X – X
I
Inlet: Adjustment of inlet valve permissible
X
Exhaust: Adjustment of exhaust valve permissible
–
Adjustment of valve not permissible
MS150114/01E 2015-03
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