BMW 1999-2005 M3 Service Manual page 237

Camshaft Timing Chain
7 of 16
http://ebahn.bentleypublishers.com/BMW/3/E46/Repair%20Manuals/1...
Working at left front of cylinder head,
disconnect electrical connections at
exhaust camshaft position sensor and
exhaust camshaft VANOS control valve
(arrows).
Remove banjo bolt from VANOS
control unit oil pressure line. Use banjo
bolt to attach BMW special tool 11 3
450 (compressed air fitting) (arrow) to
VANOS unit.
Cover oil hole in VANOS unit (arrow)
with shop towel to capture oil which will
spray when compressed air line is
connected.
- Connect compressed air line to air
fitting. Apply air pressure set to 2 -
8 bar (30 - 110 psi).
With compressed air line connected,
rotate engine in direction of rotation
(clockwise) at least two full rotations,
leaving cylinder 1 intake and exhaust
camshaft lobes facing each other, as
shown (arrows).
CAUTION!
Do not rotate engine
2/25/2009 9:51 PM