BMW 1999-2005 M3 Service Manual page 270

Camshaft Timing Chain
13 of 19
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Preload primary chain tensioner rail:
Tighten adjusting screw on BMW
special tool 11 4 220.
Tightening torque
Primary chain
tensioner preload
Unscrew oil pressure pipe from VANOS
unit. Remove banjo bolt from oil
pressure line and install BMW special
tool 11 3 450.
CAUTION!
Cover top of VANOS unit with lint-free
shop cloth. Attachment of compressed
air line will force oil to spray out of
bore.
Connect compressed air line to air
-
fitting. Apply air pressure set to 2 -
8 bar (30 - 110 psi).
With compressed air line connected,
turn engine at least twice in direction of
rotation until cylinder 1 intake and
exhaust camshaft lobes (arrows) face
each other.
CAUTION!
Do not rotate engine counterclockwise
to reach the top dead center position.
Instead, complete another two
complete rotations.
Remove sealing plug from bore on lower
left side of engine block near flywheel.
Secure crankshaft in TDC position with
BMW special tool 11 2 300 (arrow).
0.7 Nm (6 in-lb)
2/25/2009 9:52 PM