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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 10-01-2012, 08:40 PM
colwell2008 colwell2008 is offline
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03 E46 belt problem or ... ?

I recorded the noise today on the following youtube video:

2003 E46 325I. Only with a cold engine, the noise will appear and stay for approx. 5 mins. I can push the engine to 5000 rpm, and the noise will also be gone. Somebody help! Is this a belt problem?
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  #2  
Old 10-01-2012, 09:53 PM
GoForthFast GoForthFast is offline
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Probably an idler or deflection pulley.
Get the belt off and spin every pulley and appliance by hand to see which ones feel beat.
Replace whatever is wrong before you drive the car any more. You don't know when your next mile could be bearing failure, and cause significant engine damage.

You came here because we know more than you do. Heed this advice.
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  #3  
Old 10-02-2012, 09:50 AM
colwell2008 colwell2008 is offline
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Quote:
Originally Posted by GoForthFast View Post
Probably an idler or deflection pulley.
Get the belt off and spin every pulley and appliance by hand to see which ones feel beat.
Replace whatever is wrong before you drive the car any more. You don't know when your next mile could be bearing failure, and cause significant engine damage.

You came here because we know more than you do. Heed this advice.
Thank you! I have been driven this car in this condition for at least two weeks already....
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  #4  
Old 10-02-2012, 10:17 PM
GoForthFast GoForthFast is offline
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Gonna continue to drive it now?
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  #5  
Old 10-03-2012, 06:23 AM
colwell2008 colwell2008 is offline
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Quote:
Originally Posted by GoForthFast View Post
Gonna continue to drive it now?
I will have it checked at my earliest convenience. The strange thing is that the noise has disappeared for the past two days.
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  #6  
Old 10-03-2012, 10:07 PM
GoForthFast GoForthFast is offline
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Calm before the storm.

Think about it: Those pulleys rotate at 2X engine speed.
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