7.4.2 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
Y4345893
1
Barring device
F6786031
1
Ratchet with extension
F30006212
1
Double-head box wrench
F30002800
1
Angular screw driver
F30453001
1
Insertion socket wrench, 17 mm
F30030450
1
Torque wrench, 20–100 Nm
F30026582
1
Ratchet adapter
F30027340
1
Measuring instrument
Y4348409
1
Preparatory steps
1.
Remove air filter (→ Page 115).
2.
Remove cylinder head cover (→ Page 83).
3.
Remove HP line and injector (→ Page 89)
Positioning A1 piston at TDC
Note:
With cylinder head and valve drive installed
1.
Insert preloaded dial gauge (2) into measur-
ing device (4) and use screw (1) to secure.
2.
Install measuring device (4) in cylinder head
and use knurled screw (3) to secure.
3.
Zero dial gauge (2).
4.
Use barring device to turn engine until piston
A1 reaches firing TDC.
Result:
The piston is at firing TDC when both rocker
arms are unloaded, i.e. have clearance.
84 | Valve Drive | MS150119/01E 2016-02
TIM-ID: 0000060076 - 004
