Installing Valve Stem Seal; Checking Valve For Wear - BMW F 650 GS Repair Manual

11 34 800 Installing valve stem seal

•
Install bottom valve spring retainer (1).
•
Use a drift, BMW No. 11 6 650, to insert valve
stem seal (2).
11.32

Checking valve for wear

2
•
Check valve stem diameter and valve head seat
1 width.
Wear dimensions for valve:
Stem diameter
Inlet valve ...........................min. 4.89 mm (0.177 in)
Exhaust valve .....................min. 4.89 mm (0.177 in)
•
Check valve for runout.
L
Note:
Remove oil carbon from valve and deburr grooves
for valve collets with an oilstone.
E110120
For wear limits, see Technical Data.
•
Check grooves for valve collets.
F110190