BMW 3 (E46). Manual — part 60
Set timing chain on exhaust camshaft
end.
Working in cylinder head cavity,
remove timing chain cover bolts
(arrows).
Remove secondary chain lower guide
bolts (arrows). Remove chain guide.
Note:
Bolt on intake camshaft side is long and
extends into timing chain cover.
-
Remove crankshaft hub center
bolt and remove crankshaft hub
(to 1/2000 models) or vibration
damper (models from 1/2000).
CAUTION!
The crankshaft must not be allowed
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
-
Impulse wheel
mounting nut
2
-
Camshaft
impulse wheel
(exh.)
3
-
Spring plate
4
-
Thrust spacer (T
= 3.5 mm)
5
-
Primary chain
tensioner
6
-
Torx screw
7
-
Exhaust
secondary
sprocket
8
-
Splined shaft
9
-
Secondary
timing chain
10
-
Splined sleeve
11
-
Primary
sprocket
12
-
Threaded stud
13
-
Secondary
chain tensioner
14
-
Sprocket
mounting nut
15
-
Spring plate
16
-
Splined shaft
17
-
Intake camshaft
sprocket
18
-
Secondary
chain lower
guide
19
-
Thrust spacer
20
-
Camshaft
impulse wheel
(intake)
21
-
Chain tensioner
rail
22
-
Crankshaft
sprocket
23
-
Threaded stud
24
-
Primary chain
25
-
Threaded stud
26
-
Guide rail
27
-
Threaded stud
28
-
Woodruff key
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