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2005 x5 4.8is engine whine all the time. 2005 x5 4.8is engine whine all the time.
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Old 01-23-2012, 12:37 AM
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Engine whine
It was the pulley that bolts to the alternator, not the alternator
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Old 01-23-2012, 12:27 PM
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Quote:
Originally Posted by Baber9310 View Post
It was the pulley that bolts to the alternator, not the alternator
I don't understand what you mean here. Do you have a part number? Thanks.
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Old 01-23-2012, 12:46 PM
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Quote:
Originally Posted by Baber9310 View Post
It was the pulley that bolts to the alternator, not the alternator
That happens on occasion as well. The pulley can be found HERE for build dates before 12/2003. The pulley for after 12/2003 can be found HERE.



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Old 01-23-2012, 03:11 PM
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No it's the idler pulley
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Old 01-29-2012, 01:31 AM
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I have the same sound which is directly related to engine speed, however.....

1. Alternator replaced ~4 months ago (unrelated to the noise)
2. Both pulleys replaced at first diagnosis of the whining sound--they were in fact bad, but there was no effect on the sound
3. Sound seems to be less prominent after the vehicle warms up, and sometimes goes away altogether if I shut off the engine after the truck is already warm). Upon restart, sometimes the sound all but goes away.
4. Latest diagnosis is that it is the transmission??? Since this sound occurs both at rest (in Park or Neutral), as well as in gear, I am skeptical. When in gear, there is a slight increase to the noise when the trans shifts into a higher gear.

Is the transmission turning with the engine when it is in Park or Neutral? Is it really possible that the whining is coming from the transmission?

'02 4.6is with 198k miles and the trans has never been opened, so still has the original "lifetime" fluid.

All educated opinions appreciated...
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Last edited by Budget M3; 01-29-2012 at 01:37 AM.
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Old 01-25-2012, 05:02 PM
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engine whine
it was the idler pulley on my 4.8is part # is 11287549557
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Old 01-26-2012, 11:35 PM
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How many miles do you have? I had an S/C whine and it turned out that it was a broken timing chain guide.
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Old 01-27-2012, 11:28 AM
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Quote:
Originally Posted by Baber9310 View Post
it was the idler pulley on my 4.8is part # is 11287549557
In case anyone is looking for an idler pulley we have it available HERE



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Old 12-28-2011, 12:23 PM
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LOL, I am replacing so much already, I need to get that done before all these damn parts take over my garage.

What did you pay for yours. I see you are in Copenhagen.
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Old 12-28-2011, 06:54 PM
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Originally Posted by SlickGT1 View Post
LOL, I am replacing so much already, I need to get that done before all these damn parts take over my garage.

What did you pay for yours. I see you are in Copenhagen.
Genuine BMW part (only) in Denmark is around $1500!

German eBay is around $390 for the same part from the same manufacturer...

RealOEM $645
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