00.29
Checking/renewing spark plugs
(Inspection II, III)
•
Pull off spark plug cap with cap assembly tool,
BMW No. 12 3 520.
•
Unscrew and remove spark plugs with spark-
plug wrench, BMW No. 12 3 510.
Electrode gap: ........................ 0.8 mm (0.0315 in)
Gap wear limit:............................. 1.0 mm (0.04 in)
e Caution:
Do not bend electrodes - risk of breakage!
Taking up slack at cylinder heads
(Inspection I)
•
Remove cylinder head cover.
e Caution:
Trap escaping oil.
•
Select a gear and turn the rear wheel, or set the
piston to TDC by turning the belt pulley.
Top dead centre on ignition stroke:
1. The OT (TDC) mark appears and
2. the inlet and exhaust valves of the cylinder in
question are closed.
•
Tighten cylinder head nuts.
Tightening procedure after 1000 km ( 600 miles )
1. Tighten cylinder head nuts individually in a cross-
wise pattern
1.1.Slacken off one nut
1.2.Tighten nut to init. torque....................... 20 Nm
1.3.Tighten nut to specified wrench angle....... 180°
2. Unfasten/retighten M10 screw ................ 40 Nm
12 3 510
RS000010
RS 00. 002
TDC
RS00002
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