Valve Clearance: Adjustments

11 34 004 Adjusting valve clearance (S54)

Special tools required:
- 11 3 160
- 11 4 400
- 11 5 100

Preliminary Procedures:

- Remove cylinder head cover. Service and Repair

- Remove fan clutch with fan impeller and fan cowl. Service and Repair

- Remove spark plugs.




Note: Fit special tool 11 5 100 on four screws on vibration damper and crank engine.




- With cams pointing upwards, measure valve clearance with special tool 11 3 160.
- Note down measured values.
- Compare measured valve clearance with prespecified ventil clearance.

If the measured valve clearance is outside the stipulated valve clearance tolerance:

Caution: It is very easy for the adjustment plates to fall down.

- Place a clean cloth underneath the valve to be adjusted.
- Seal oil return and vent holes.
- Seal opening to timing case cover at first cylinder.
- Seal soak clue bores.

Caution: Do not damage sealing surface for cylinder head cover.




- Carefully detach retaining clip (1) from rocker arm shaft.

Caution:
- It is very easy for the adjustment plates to fall down.




- Carefully slide rocker arm to one side.

Note:
- Special tool 11 4 400 is magnetic.




- Remove adjustment plates with special tool 11 4 400.




- Measure removed adjustment plates.

Caution: It is very easy for the adjustment plates to fall down.




- Insert required adjustment plates with special tool 11 4 400.

Caution: Incorrect installation possible!

- When the rocker arm is pushed back, there is the risk that the adjustment plate will also be pushed out.




- Carefully push rocker arm back and check correct position of adjustment plates.

Note: If necessary, check correct position of adjustment plates with a mirror.

Caution: Do not damage sealing surface for cylinder head cover.




- Install retaining clip (1).

Caution: Retaining clip (1) must snap into place on left and right over rocker arm shaft (2).

- Check valve clearance. Specifications