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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Clicking noise from differential area



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      10-03-2008, 08:07 PM   #1
E92Vancouver
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Clicking noise from differential area

My E92 is a 6 speed. When going from accelerating to decelerating and vice versa at low speeds in a parking lot, I get a clicking sound. It is coming from the rear differential area and probablly the u-joints or half shaft. It is a single click. Deaccelerate is one clic. Accelerate is one click.

It sounds to be like gear back lash. I can replicate the sound when going from forward to reverse and vice versa. It is one click per direction change. I notice it most slowing down and then speeding up a bit to go over speed bumps. There is no click under constant power,

Anyone else notice this? You can only hear it if the window is open.
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      10-04-2008, 07:30 AM   #2
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It's the sound of the exhaust valve operating, don't worry it's normal.
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      10-05-2008, 07:37 PM   #3
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It's the sound of the exhaust valve operating, don't worry it's normal.
Thanks for the reply but my car does not have the vacuum operated exhaust valve. I took the car to the dealer. The service manager said it is play in the half shafts and don't worry about. Oh well. The car has a warranty, so I will keep an eye on it.
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      10-06-2008, 06:39 PM   #4
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Got the problem figured out. It is a very common problem with the E92 manuals. There is a splined male/female coupling that gets loose and wears out.
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      10-06-2008, 06:58 PM   #5
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did you go to dealer?

did you fix it?

Keep us updated.
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      10-06-2008, 07:01 PM   #6
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did you go to dealer?

did you fix it?

Keep us updated.
I am scheduled to go in this Wednesday to the dealer. They put green loctite on the splines to take up the play. It is very strong stuff that bonds to the metal through an aerobic reaction.
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      10-08-2008, 06:51 PM   #7
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My car was fixed. Quite a common problem with E92 manuals. I guess we are too hard on our cars.
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