Double Vanos Components View (M52 Tu, M54 Engine) - BMW 1999-2005 M3 Service Manual

Camshaft Timing Chain
14 of 16
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to rotate when the timing chains are
loosened or removed. The pistons
can contact the valves.
Using a drift of less than 5 mm
diameter, drive two locating dowels (A)
in left and right sides of lower timing
chain cover toward rear of car. Remove
cover mounting bolts (arrows) and
carefully lift cover off.
CAUTION!
Use care when removing the cover
from the cylinder head gasket. If the
cover is stuck, use a sharp knife to
separate it from the head gasket.
Note:
The chain cover can be removed
with the coolant pump installed.
Use care when removing the cover
from the coolant pipe at rear.
- Push primary chain tensioner
guide rail aside and remove chain.
Double VANOS
components (M52
TU, M54 engine)
1
2
3
4
- Impulse wheel
mounting nut
- Camshaft
impulse wheel
(exh.)
- Spring plate
- Thrust spacer (T
= 3.5 mm)
2/25/2009 9:51 PM