• Relieve tension on valve springs. • Check valves for leakage (blow-by). 11.29 11 5 602 11 5 690 RS110160 Installing valve and valve stem seal L Note: If a valve was removed, the valve stem seal must be renewed. • Oil the stem when installing the valve. • Shrink a short length of tube (arrow) on to the end of the valve stem. • Install the valve stem seal with a 5 mm (0.20 in) dia. drift, BMW No. 11 5 602. e Caution: Remove the shrunk-on tube. • Fit lower spring plate, valve spring and upper spring plate. • Compress the valve springs with the valve spring clamp, BMW No. 11 5 690. L Note: Insert the taper valve collets using grease (to simpli- fy assembly). e Caution:
Ensure that valve collets are correctly seated in the valve stem grooves.