BMW 5251 Service Manual page 263

4
With crankshaft at TDC position, remove vibration damper
bolts (arrows) and remove vibration damper.
<
Mount crankshaft holding tool (BMW special tool 11
2
150
and 11 2 410) to crankshaft hub. Counter hold crankshaft and
loosen crankshaft hub retaining bolt.
Crankshaft hub retaining bolt is torqued to 410 Nm (300 ft-lb).
Do not use flywheel locliing tool to hold cranl(shait stationary
to loosen or tighten crankshaft hub center bolt. Use only the
special tools specified, or equivalent hub holding tool.
-
Remove crankshaft hub.
-
Remove cylinder cover mounting fasteners and remove cyl-
inder head cover.
NOTE-
The cylinder head cover mounting bolt insulators and gas-
lets should be reinstalled in their original positions. Make
note of their arrangement during removal.
-
Drain engine oil, remove oil pan. See 119 Lubrication Sys-
tem.
Remove primary timing chain tensioner (arrow).
CAUTION-
Timing chain tensioner is under spring tension.
I
-
Remove VANOS control unit. See VANOS control unit, re-
moving (M52 engine).
-
Remove fasteners from intake and exhaust camshaft
sprocket.