Check Valve For Wear; Check Valve Springs For Wear - BMW C1 200 Repair Manual

Check valve for wear

A
•
Check stem diameter and seat width on valve
spring cap
•
Check valve for runout
Wear dimension for valve:
Valve stem Ø "A" ..............min. 3.95 mm (0.1555 in)
Valve stem runout ...........max. 0.06 mm (0.0024 in)
Valve seat surface "B" .............. 0.6 mm (0.0236 in)
L
Note:
Remove carbon deposits from valve, use grinding
stone to remove burrs from collet grooves.
•
Check collet grooves

Check valve springs for wear

B
F110190
•
Check valve springs for breakage, deformation
and loss of tension
Wear dimensions C1:
Extended spring length "L" ................ min. 36.7 mm
.......................................................(min. 1.4449 in)
Wear dimensions C1 200:
Extended spring length "L" ................ min. 40.8 mm
.......................................................(min. 1.6063 in)
L
Note:
The new version of the valve spring is tapered. Al-
ways install tapered valve springs with the smaller
diameter at the top! Use only one type of valve
spring!
•
Check grooves for collets
L
C1111240
11.31