Checking/adjusting valve clear-
ances
e
Caution:
Never unscrew the spark plugs before measuring
valve clearances. Particles of oily soot could be-
come lodged behind an exhaust valve head and fal-
sify the measurement.
Remove left side section of fairing.
•
Remove the cylinder head cover.
•
Remove cover for Hall-effect transmitter.
•
Turn the engine only at the crankshaft (direction
•
of rotation: anti-clockwise).
Measure valve clearance with feeler gauge.
•
Max. engine temperature 35 °C.
•
Determine size of replacement tappets by com-
•
paring desired and actual measurements.
Valve clearances:
Inlet ..................... 0.15...0.20 mm (0.006...0.008 in)
Exhaust ............... 0.25...0.30 mm (0.010...0.012 in)
Adjusting valve clearances
The camshaft must be removed before the buck-
•
et tappets can be renewed.
Set cylinder 1 (timing end) to top dead centre on
•
the ignition stroke.
The adjusting device for the camshafts,
•
BMW No. 11 3 700, must enter the slots at the
end of the shafts.
Remove the screw plug in the timing case cover.
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11.52
11 3 700
LT110800
1
2
3
Hold the chain tensioner and timing chain with
•
eccentric tensioner, BMW No. 11 2 640.
Pull back tensioning pin (1) and screw in eccen-
•
tric (2) by 3...4 turns.
Push the tensioning pin forward above the timing
•
chain.
Turn the eccentric slightly to the right to locate
•
the timing chain and chain tensioner.
Secure the eccentric with locknut (3).
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Remove the chain sprockets.
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Remove the camshafts.
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Renew the bucket tappets as necessary.
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Assemble in the reverse order of work.
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