Hi everyone,
I've recently got my e30 running with an m50TU, and I'm slowly ironing out all the kinks. One of the main issues I'm having trouble with is a loud whining/rubbing noise coming from the front of the engine at lower rpms (sub 3500). When the car is cold, the motor seems to bog until 3500-4000 rpm (as though the brakes are being applied then released). I don't have the Vanos "rattle" but I'm led to believe the Vanos isn't functioning properly.
Initially I thought it was a misaligned serpentine belt, but the engine made the same noise without the belt installed, specifically from the top of the motor where the Vanos unit sits.
The m50 I'm using has a Dr. Vanos stage 1 unit that was installed about 4 years ago, and ran fine, but it was pulled in favor of an s52, so the motor had sat for 3 years until now. I've put close to 500 miles on the motor and the noise doesn't seem to show signs of going away.
I performed the stomp test and don't have any check codes pertaining the the Vanos. Has anyone had a refurbished Vanos unit go bad on them? I find it unlikely, but not out the question. I've tried flushing the motor, but no success.
If anyone has any suggestions how to get rid of this noise, I'm all ears!
Thanks,
Joey
I've recently got my e30 running with an m50TU, and I'm slowly ironing out all the kinks. One of the main issues I'm having trouble with is a loud whining/rubbing noise coming from the front of the engine at lower rpms (sub 3500). When the car is cold, the motor seems to bog until 3500-4000 rpm (as though the brakes are being applied then released). I don't have the Vanos "rattle" but I'm led to believe the Vanos isn't functioning properly.
Initially I thought it was a misaligned serpentine belt, but the engine made the same noise without the belt installed, specifically from the top of the motor where the Vanos unit sits.
The m50 I'm using has a Dr. Vanos stage 1 unit that was installed about 4 years ago, and ran fine, but it was pulled in favor of an s52, so the motor had sat for 3 years until now. I've put close to 500 miles on the motor and the noise doesn't seem to show signs of going away.
I performed the stomp test and don't have any check codes pertaining the the Vanos. Has anyone had a refurbished Vanos unit go bad on them? I find it unlikely, but not out the question. I've tried flushing the motor, but no success.
If anyone has any suggestions how to get rid of this noise, I'm all ears!
Thanks,
Joey
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