7.3 Valve Drive
7.3.1 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
Y4345893
1
Barring device for engine
F6783914
1
Ratchet
F30006212
1
Double box wrench
F30002800
1
Angular screw driver
F30002816
1
Socket wrench
F30030450
1
Torque wrench, 10-60 Nm
F30510423
1
Measuring instrument
Y4345888
1
Preparatory steps
1.
Remove air filter (→ Page 67).
2.
Remove cylinder head cover (→ Page 47).
Positioning A1 piston at TDC
Note:
With cylinder head and valve gear installed.
1.
Insert preloaded measuring gauge (2) into
measuring device (4) and secure using
screw (1).
2.
Install measuring device (4) in cylinder
head and secure using knurled screw (3).
3.
Zero dial gauge (2).
4.
Turn engine using barring device until pis-
ton A1 reaches firing TDC.
Result:
The piston is at firing TDC when both rock-
er arms are unloaded, i.e. have clearance.
MS150111/01E 2014-05
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