00.20
Checking valve clearance and
adjusting if necessary
Inspections I, III
e
Caution:
Never unscrew the spark plugs before measuring
the valve clearance. Carbon particles may settle be-
hind an exhaust valve head and falsify the measured
result.
•
[RS] Remove bottom section of fairing .
•
Remove left side section of fairing.
•
Remove cylinder head cover.
•
Remove cover for Hall generator.
•
Only crank engine at the crankshaft (counter-
clockwise!).
•
Measure valve clearance with feeler gauge.
•
Max. engine temperature 35 °C.
•
Determine the replacement tappet by way of
nominal/actual value comparison.
Valve clearance:
Inlet .................0.15 - 0.20 mm (0.0059 - 0.0079 in)
Exhaust ...........0.25 - 0.30 mm (0.0098 - 0.0118 in)
Adjusting valve clearance
•
The camshafts must be removed in order to
change the bucket tappets.
•
Set cylinder No. 1 (timing end) to ignition TDC.
•
The setting device for the camshafts,
BMW No. 11 3 700, must fit in the slots at the
ends of the shafts.
•
Unscrew screw plug in chain case cover.
•
Lock chain tensioner and timing chain in position
with eccentric tensioner, BMW No. 11 2 640.
•
Pull back clamping pin (1), screw in eccentric pin
(2) by 3-4 turns.
•
Push in clamping pin above the timing chain.
•
Fix timing chain and chain tensioner in position
by slightly turning eccentric pin in clockwise di-
rection.
•
Secure eccentric pin with locknut (3).
Removing sprockets
•
Release retaining bolts of sprockets and remove
sprockets.
Removing camshafts
•
Remove chain guide from stud bolt.
•
First remove thrust bearing of camshafts to avoid
misalignment.
•
Remove remaining camshaft bearings and lift out
camshaft.
•
Remove bucket tappets to be changed with relay
pliers BMW No. 61 1 250, or a magnet.
11 3 700
LT000190
11 2 640
LT000200
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LT000210
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