BMW 5251 Service Manual page 261

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Camshaft Timing Chain
- .
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Measure gap (B) between secondary timing chain tensioner
and intake camshaft sensor wheel. Make note of distance.
To determine VANOS control travel:
Distance I3
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distance A = a minimum of 8.5 mm
CAUTION-
I f the adjustment travel is less than 8.5 m m the VANOS ad-
justment unit must be removed and readjusted. See VANOS
control unit, removing (M52 engine) and VANOS con-
trol unit, installing (M52 engine).
Remove special tools:
Cranltshaft locking tool.
Camshaft loclting tool set.
Air fitting.
*
VANOS cable adaptor.
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Install VANOS oil line with new seal
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Install oil baffle cover above intake camshaft.
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Install cylinder head cover mounting studs to rear of head.
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Install cylinder head cover,
Tightening
torques
Cylinder head cover
10
Nrn
(89
in-lb)
VANOS oil line
32
Nm
(24
R-lb)
VANOS solenoid to control unit
30
Nrn
(22
ft-lb)
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Installation of remaining parts is reverse of removal.