Table of Contents
Advertisement
Position
Overlap TDC in cylinder
A1
Inlet: Valve clearance adjustment of inlet valve is permitted
I
X
Exhaust: Valve clearance adjustment of exhaust valve is permitted
Valve clearance adjustment is not permitted
–
Table 39: Scheme for valve clearance adjustment
Valve clearance at two crankshaft positions – Check
1.
Check TDC position of piston in cylinder A1:
• If rocker arms on cylinder A1 are unloaded, the piston is in firing TDC.
• If rocker arms on cylinder A1 are loaded, the piston is in overlap TDC.
2.
Check valve clearance with cold engine:
• Inlet valves (long rocker arm) = 0.3 mm
• Exhaust valves (short rocker arm) = 0.5 mm
3.
Check all valve clearances in two crankshaft positions (firing TDC and overlap TDC of cylinder A1) as per
diagram.
4.
Use feeler gauge to determine distance between valve bridge and rocker arm.
5.
If the deviation from the specified value exceeds 0.1 mm, adjust valve clearance.
Valve clearance – Adjustment
1.
Release locknut (1).
2.
Insert feeler gauge (3) between valve bridge
and rocker arm.
3.
Use angular screw driver to set adjusting
screw (2) so that the specified valve clear-
ance is provided.
4.
Feeler gauge (3) must just pass through the
gap.
5.
Use torque wrench to tighten locknut (1) to the specified tightening torque, holding the adjusting screw (2)
to prevent it from turning.
Name
Locknut
6.
Replace or rectify adjusting screws and/or locknuts which do not move freely.
7.
Check valve clearance.
Final steps
1.
Remove barring device (→ Page 131).
2.
Install cylinder head cover (→ Page 151).
Cylin-
1
2
der
Bank A
– –
I –
Bank B
– X
I –
Size
Type
M16
Tightening torque
3
4
5
6
I X
– X
I –
– X
I X
– X
– –
I X
Lubricant
(Engine oil)
MS150122/00E 2015-07 | Task Description | 149
10
7
8
9
I –
– –
– X
I X
I –
– –
– X
I –
Value/Standard
90 Nm+9 Nm
Advertisement
Table of Contents
