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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 07-11-2013, 04:05 PM   #1
TopasE46
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Join Date: Mar 2013
Location: Portland, OR
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My Ride: 2001 325Ci
"Pulsing" rubbing sound from the engine bay

I have been noticing a "pulsing" rubbing/vibrating sound coming from my engine bay I tried to capture it with video but it wouldn't pick up the noise.

I've looked under and around the engine bay nothing is rubbing or vibrating on anything. It does it hot and cold, doesn't matter what electrical load I put on the alternator, PS pump is new, and it does it a/c on or off.

I've tried pinpointing it with a stethoscope, but to no avail.

Any ideas what this could be?

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Old 07-11-2013, 04:11 PM   #2
Mflara20
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"Pulsing" rubbing sound from the engine bay

I almost had that sound and it turn out it was the water pump. You might of check it out.


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Old 07-11-2013, 09:34 PM   #3
MCM97
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is there any vibration with the noise?
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Old 07-12-2013, 01:38 AM   #4
Mflara20
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"Pulsing" rubbing sound from the engine bay

No I just had a noise. You might want to look for any leaks and pulleys.


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Old 07-12-2013, 05:03 AM   #5
TopasE46
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Re: "Pulsing" rubbing sound from the engine bay

Quote:
Originally Posted by MCM97 View Post
is there any vibration with the noise?
There is no vibration with the noise that can be felt in the interior.

This also only happens at idle. Off idle, accelerating, decelerating or anything over about 1,000-1,200 is normal. No vibration, no noise that I can hear. Although my car does have a muffler delete so it may still be there but I doubt it.

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Last edited by TopasE46; 07-12-2013 at 01:54 PM.
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