00.54
12 12 011 Checking/replacing spark
plugs
(Inspection II) check/(Inspection III) replace
•
Pull off spark plug caps with special puller,
BMW No. 12 3 520.
•
Remove spark plugs with the spark plug wrench,
BMW No. 12 3 510.
e Attention:
Do not bend electrodes - risk of breakage!
Spark plug:..................................NGK BKR 7 EKC
Electrode gap: ........................ 0.8 mm (0.0314 in)
Wear limit:................................ 1.0 mm (0.0393 in)
X Tightening torque:
Spark plug NGK BKR7EKC.......................... 25 Nm
11 12 009
Tightening cylinder heads
(Inspection I)
•
Remove cylinder head cover.
e Attention:
Catch escaping oil.
•
Select a gear and turn the rear wheel, or set the
piston to TDC on the ignition stroke by turning
the belt pulley.
Top dead centre on ignition stroke:
•
The TDC mark is visible and the inlet and exhaust
valves in the cylinder concerned are closed.
•
Tighten cylinder head nuts.
Tightening procedure after 1,000 km (600 miles)
1. Tighten the cylinder head nuts one after the
other in diagonally opposite sequence
1.1. Slacken off one nut at a time
1.2. Tighten nut to initial torque.................... 20 Nm
1.3. Tighten nut to specified wrench angle...... 180°
2. Slacken/retighten M10 screw................ 40 Nm
R21000190
12 3 520
12 3 510
R21000330
R21000370
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