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Old 11-21-2013, 10:16 PM   #1
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Join Date: Nov 2012
Location: Australia
Posts: 12
My Ride: 330ci
Question E46 belts and pulley check

Recently my car started making a squealing noise and I narrowed it to the front of the car where my belts are.

pouring a little bit of water made the noise go very quiet but still noticeable.

I removed my serpentine belt and played around with the pulleys to make sure they were smooth and quiet...they weren't

My idler pulley and belt tensioner pulley were noisy- Ill replace those as well as my AC belt and Serpentine belt.

I checked my water pump,alternator and power steering pulleys too but Im not sure that they are functioning correctly...they make some noise and dont move as smooth.

Is this normal for those pulleys?
check my video

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Old 11-22-2013, 06:47 AM   #2
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Join Date: Aug 2013
Location: sydney australia
Posts: 11
My Ride: mora metallic 325ci
Need some new pulleys there

325ci individual in Mora metallic
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Old 11-22-2013, 07:16 AM   #3
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Join Date: Nov 2007
Location: Los Angeles
Posts: 2,764
My Ride: 2001 M3
Bearings sound dry. They should turn smooth without spinning loosely.
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Old 11-23-2013, 10:42 PM   #4
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Join Date: Nov 2012
Location: Australia
Posts: 12
My Ride: 330ci
Do I need to change all my pulleys?

I ordered and idler pulley and pulley tensioner.

What about my waterpump and powersteering?

are they on their way out too?
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Old 11-24-2013, 03:42 AM   #5
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Join Date: Dec 2011
Location: Brisbane
Posts: 527
My Ride: 2004 325i
Also check the tensioner on your air conditioning belt.
Many feel that changing the pulley on the PS pump to an aluminum pulley is a good idea, since the stock pulley is composite and can fail. Personally I feel better with an aluminum pulley, so I changed mine.
The WP pulley should be fine.
The tensioner pulleys (the bearings really) are common failure items.
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Old 12-29-2014, 09:29 PM   #6
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Join Date: Dec 2014
Location: California
Posts: 5
My Ride: 325Ci
Did you end up replacing all of the pulleys? If not, which did you end up replacing?

I'm hearing the pulley-bearing whine when starting a '04 325ci and think it may be the same issue.
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belt, e46, noise, pulley, squealing

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