BMW 1999-2005 M3 Service Manual page 240

Camshaft Timing Chain
10 of 16
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residual oil. Place shop towels
beneath adjustment unit when
removing.
If the VANOS control unit is
replaced, or if repair operations
are completed that may change
camshaft timing, the camshaft
timing must be checked as
described later in this chapter.
Remove primary camshaft chain
tensioner (arrow) from timing chain
cover.
CAUTION!
Primary camshaft chain tensioning
piston is under spring pressure.
Press down on secondary chain
tensioner and lock into place using
BMW special tool 11 3 292 or a similar
size rod.
Remove exhaust camshaft impulse
wheel mounting nuts (arrows).
Remove impulse wheel (A).
2/25/2009 9:51 PM