00.38
Checking valve clearances
– Remove left and right service covers
– Swivel out powerplant cradle
•
Open hose clamp (arrow) with pliers
BMW No. 17 5 500
•
Unscrew cylinder head cover bolts (1)
•
Watch throttle (arrow)
•
Remove spark plug
•
Use camshafts to rotate engine until the lobes
are pointing outward
•
Measure valve clearance using single feeler
gauge blade
•
Record the valve clearances
•
and adjust valve clearance as indicated (replace
valve lifters)
Specified clearances:
Inlet valve clearance........................0.05…0.09 mm
............................................ (0.00197…0.00354 in)
Exhaust valve clearance..................0.20…0.29 mm
............................................ (0.00787…0.01147 in)
C1000150
1
17 5 500
C1000160
IV left
mm (in)
IV right
mm (in)
EV left
mm (in)
EV right
mm (in)
Spec.
clearance
0.05
(0.00197)
0.09
(0.00354)
0.05
(0.00197)
0.09
(0.00354)
0.20
(0.00787)
0.29
(0.01147)
0.20
(0.00787)
0.29
(0.01147)
Clearance,
measured
(used)
0.15
(0.00590)
0.15
(0.00590)
Difference
0.01
(0.00039)
-0.05
(-0.00197)
C1111001C1000170