Quote:
Originally Posted by VCMpower
The vanos has split tension gears so lack of oil is not your issue. Possible the setting of the split gear or timing chain tension procedure was done incorrectly.
(1)Installation Note:
If the hexagon socket screw is released or forgotten by mistake, the gear teeth can be readjusted with special tool 11 5 370.
Screw in knurled screw on special tool 11 5 370 until gearwheel (1) lines up with bore (see arrow) on thread.
Failure to tension the exhaust VANOS gear (1) will result in rattling noises at idle.
(2)Release special tool 11 5 320 and continue barring engine at central bolt 10° to firing TDC position of cylinder no. 1.
Installation Note:
This minimizes timing chain and gearwheel play.
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I would hope that all of this would be installed correctly from the factory.. purchased the car brand new and nothing has ever been replaced other than the idle control valve which took 4.5 years and 42K miles to fail. I will forward this to my shop foreman, maybe this screw they are talking about rattles loose over time?