Gælder også for motorer/gearkasser: 457 9**, 541 97*
AP05.30-B-0560-01F
Check and adjust valve clearance
Engine 457.9, 460.9
Engine
457.9
Engine
460.984 in model 934, 938
Engine
541.97 in model 936.315
Test value for the valves
Number
Designation
Engines 457.9, 460.984
BE05.30-B-1011-01D
Valve lash (adjustment values)
intake
mm
0,40
exhaust
mm
0,60
Test value for the valves
Number
Designation
Engines 457.9, 460.984
BE05.30-B-1012-01D
Tolerance for the valve clearance check
intake
mm
-0,05...+0,05
exhaust
mm
-0,05...+0,05
Check values for valves
Number
Designation
ENGINE 541.9, 542.9
BE05.30-N-1001-01C
Valve setback relative to cylinder head contact surface
mm
0,70...1,05
Check values for valves
Number
Designation
ENGINE 541.9, 542.9
BE05.30-N-1002-01C
Valve lift free of play
Inlet
mm
11,5
Outlet
mm
11,9
Engine Command - General
Number
Designation
Engines 457.9 ; 460.984
BA05.00-B-1001-01A
Jam nut of rocker arm adjustment
Nm
50
Engine timing - general
Number
Designation
ENGINE 541.9, ENGINE 542.9
BA05.00-N-1001-01B
Jam nut on rocker arm adjustment screw
Nm
50
1
Check valves clearance (arrows), with the feeler gauge, between the rocker arm and the valve bridge. . .
It is not necessary to adjust valve clearance if the "check values" are obtained".
2
Adjust the valve clearance (arrows). .
Using an appropriate wrench, loosen the locknut (1) and adjust valve clearance, acting on the adjustment screw (2). Tighten the locknut (1) to tighten the adjustment screw (2).
3
Check valve clearance and adjust if necessary.
When adjusting valve clearance, use feeler gauge corresponding to the "adjustment values".
Valve clearance is correct when, after tightening the locknut (1), a slight resistance is noticed when moving the feeler gauge between the rocker and the valve jumper.
