Valve Clearance: Adjustments

ADJUSTING VALVE CLEARANCE




- Remove fan cowl and fan.

CAUTION: Left Hand Threads.

- Remove cylinder head cover.
- Crank engine with Special Tool 11 3 020.




- Measure valve clearance with cams facing up.
- Compare measured valve clearance with the specified valve clearance.




- Turn openings of tappets as shown in the picture, if the measured valve clearance is not within specified valve clearance tolerances.

Clearances should be:
Cold [1] 0.31 - 0.35mm (0.012 - 0.014in).
Hot [2] 0.35 - 0.40mm (0.014 - 0.016in).
[1] Cold (below 95° F, 35° C )
[2] Hot (185° to 203° F, 85 to 95° C )

NOTE: BMW provides both hot and cold valve clearance specifications but does NOT recommend hot valve clearance adjustment.




- Guide in Special Tool 11 3 170 in accordance with camshaft "A" or "E" and press tappets down.




- Blow out the valve shim with compressed air.




- Measure thickness of removed valve shim.
- Install shim of required thickness with the lettering facing down.
- Reinstall cylinder head cover.