BMW 5251 Service Manual page 305

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Camshaft Timing chain1
4
Remove oil lines from camshaft supports (arrows).
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Remove radiator cooling fan and fan shroud. See 170 Radi-
ator and Cooling System.
NOTE-
The radiator cooling fan nut (32 mm wrench) has left-hand
threads.
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Remove engine drive belts alternator and AlC compressor.
See 020 Maintenance.
4
Remove vibration damper bolts (arrows) and remove
damper.
4
Mount BMW special tool 11 2 450 to crankshaft hub while
aligning damper locator pin with hole (arrow) in special tool.
CAUTION-
Crankshaft center bolt is torqued to 410 Nm (300 ft-lb) use
BMWspecial tool I I 2 450 to secure crankshaft when remov-
ing center bolt.
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Loosen and remove cranltshaff center bolt.