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7.2 Valve Drive
7.2.1
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
Torque wrench, 20-100 Nm
F30026582
1
Box wrench, 14 mm
F30028346
1
Allen key, set 2-10 mm
F30453050
1
Barring gear
F6790714
1
Preparatory steps
1.
Remove cylinder head cover (→ Page 98).
2.
Remove cover on the bottom of flywheel housing, A side.
3.
Install barring gear at opening.
4.
Rotate crankshaft with barring gear in engine direction of rotation until "OT-A1" mark and pointer are
aligned.
Diagram for 8 V engines (two
crankshaft positions)
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
MS150076/05E 2014-02
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