Checking valve clearance at two
crankshaft positions
1.
Check TDC position of piston in cylinder A1:
• If the rocker arms are not under load on
cylinder A1, the piston is in firing TDC.
• If the rocker arms are under load on cylin-
der A1, the piston is in overlap TDC.
2.
Check valve clearance with the engine cold:
• Inlet = 0.4 mm;
• Exhaust = 0.6 mm;.
3.
Check all valve clearances in two crankshaft
positions (firing TDC and overlap TDC of cyl-
inder A1) as per diagram:
1 Cylinder A1 is in firing TDC
2 Cylinder A1 is in overlap TDC
I Inlet valve
X Exhaust valve
4.
Use feeler gauge to determine the distance
between valve bridge and rocker arm.
5.
If the deviation from the set value exceeds
0.1 mm, adjust valve clearance.
Adjusting valve clearance
1.
Loosen locknut (1) and unscrew adjusting
screw (2) slightly.
2.
Insert feeler gauge between valve bridge and
rocker arm.
3.
Readjust adjusting screw (2) so that the feel-
er gauge just passes through the gap.
4.
Tighten locknut (1) applying the specified tightening torque, holding adjusting screw (2) firmly with screwdriv-
er.
Name
Size
Type
Lubricant
Value/Standard
Locknut
M12x1
Tightening torque
50 Nm
74 | Task Description | MW15409/04E 2015-08
TIM-ID: 0000004360 - 006
Summary of Contents for 12V2000M91
Page 1: ...Operating Instructions Diesel Engine 12V2000M91 16V2000M91 MW15409 04E...
Page 23: ...MW15409 04E 2015 08 General Information 23 TIM ID 0000002178 006...
Page 24: ...Lube oil system covers 24 General Information MW15409 04E 2015 08 TIM ID 0000002178 006...
Page 25: ...MW15409 04E 2015 08 General Information 25 TIM ID 0000002178 006...
