BMW 5251 Service Manual page 260

1 17-24
I
Camshaft Timing Chain
4
Remove banjo bolt from VANOS unit oil feed line and install
BMW special tool 11 3 450.
NOTE-
Oil will drain from oil feed line.
-
Connect compressed air line (with pressure set to
2-8
bar or
30-1 10 psi.) to air fitting.
4
Measure gap (A) between secondary timing chain tensioner
and intake camshaft sensor wheel. Make note of distance.
4
Connect cable test (BMW special tool 11 6 410) to VANOS
connector. Connect positive clip to positive battery terminal.
-
Connect negative clip to battery negative terminal.
CAUTION-
Reversing terminals on special tool will damage diode on
VANOS solenoid valve.