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.
Valve clearance gauge
Y4345893
1
Barring tool
F6792910
1
Ratchet
F30006212
1
Double-end box wrench
F30002800
1
Offset screwdriver
F30453001
1
Socket wrench
F30030450
1
Torque wrench, 10-60 Nm
F30510423
1
Measuring device
Y4348409
1
Preparatory steps
1.
Install barring tool (→ Page 68).
2.
Remove cylinder head cover (→ Page 74).
Positioning A1 cylinder piston at
TDC
Note:
With cylinder head and valve gear installed.
1.
Insert preloaded dial gauge (2) into meas-
uring device (4) and clamp 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 tool until piston
A1 reaches firing TDC.
Result:
The piston is at firing TDC when both rock-
er arms are unloaded, i.e. have clearance.
MS150118/00E 2014-07
| Task Description | 71
TIM-ID: 0000053450 - 001
