Fuel strainer, spark plugs, breaker points 75
Fine-mesh strainer in fuel tank immers-
ed level sensor:
i. Remove the right floor panel in the
luggage cx)mpartment.
2. Loosen clip on intake and return hoses
and pull hoses away from intake unit.
3. Turn the intake unit anti-clockwise
with a suitable tool (screwdriver) to
unscrew the bayonet fastening, then
pul 1 out of the tank.
4. Clean the fine-mesh strainer.
Warning: Do not re-use the old gasket
wtìen installing.
Checking spark plug electrode gaps:
before installing new spark plugs, check
the electrode gaps with a feeler gauge
and bend the earth (ground) electrode
carefully if nece§sary until the gap "a" is
O.6+0.1mm (0.024+0.004 in) as speci-
fied.
Fìenew spark plugs every 15000 km
(10000 miles) during a BMW lnspection.
Before inserting spark plugs, apply a
light coating of graphite grease to the
threads.
Details of the correct spark plug types are
shown on the inside back cover.
Fìenew the breaker points every 15000
km (10000 miles) during a BMW lnspec-
tion.
Adjust the dwell angle with the aid of the
BMW Program Tester's dwell angle
meter. BMW 630 CS: 35-41°; BMW 633
Csi: 52+5° at 4500 rev/min.
If no dwell angle tester is available in an
emergency or during a journey, adjust
the breaker points gap on the BMW
630 CS as follows:
Turn the engine over slowly until the
breaker arm is fully raised ("A" - fiber
slider pad at highest point on distributor
shaft cam).
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