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Old 09-19-2008, 12:34 PM
oaksenov oaksenov is offline
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Location: Ashburn, VA
Join Date: Jul 2003
Posts: 33
Mein Auto: BMW 525i 2003, 323i 2000
Originally Posted by synenergy52 View Post
I used to have an E46 with the same engine/transmission (5spd) 2006 coupe, even same mileage and I never heard that. I was going to guess fan clutch... the M52 uses an electronic fan right? So it can't be that. You should have someone stand over the engine bay as you rev it up. Maybe ask a smog station if you can borrow their dyno rollers so you can drive through the gears. Pay for a smog check.
It is M54 engine here with mechanical fan clutch. I also have E46 with M52TU engine also with mechanical fan clutch.

The one more thing I can feel by hand light know-knock-knock sound on cover of double VANOS on this car. Compared it with E46 and it does not do it on ever there.
The strange thing to me is that it coincidentally started after just another engine oil change. I even started to read about VANOS seals replacement procedure.

Dyno rollers is good idea or even having it on lift would help.
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