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Old 12-11-2012, 11:22 PM
granlund granlund is offline
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Location: USA
Join Date: Jan 2011
Posts: 579
Mein Auto: -02 530 & -92 325is
Originally Posted by Dino1394 View Post
is that safe? i wanna try it just for the heck of to see what my car will do lol
Yes, I recently diagnosed a friend's car that way.

The electrical wire goes from the solenoid on the front edge of the motor (near the oil filter housing) to a connector underneath the intake manifold. It might be a little bit difficult to reach the connector, but you should see it.

If there is no electrical signal to the solenoid, it will not apply oil pressure to the VANOS piston to advance the cam. However, if the VANOS piston seals are bad (which is very common on older cars), the oil pressure will also not advance the cam and you will experience poor performance.

This is an easy way of diagnosing the VANOS with no cost in parts, nor any measurements.
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