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E36 /7 Z3 (1996-2002)
E36/7 Z3 roadster and coupe talk with our gurus here.

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  #1  
Old 10-13-2012, 05:34 AM
Clif Shifflett Clif Shifflett is offline
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Location: Virginia
 
Join Date: May 2011
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Mein Auto: 1998 BMW Z3
98 z3 convertable

98 Z3 convertable with a bad vibration only at 70 and above. Vibration is only apparent when looking into the rear view mirror and seat. Steering wheel is smooth. Wheels have been balanced twice and a front end alignment @ a BMW shop. Also new KYB shocks front and rear. Wheels are aftermarket.

Any thoughts?

Clif
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  #2  
Old 10-13-2012, 01:46 PM
smayo964 smayo964 is offline
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Location: MS
 
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Posts: 151
Mein Auto: 1999 Z3 Roadster
Clif, how quiet is it in the car? I mean do you hear a rumbling or something that sounds like to much tire noise? I thought mine was tires, then I started getting a ratcheting sound at certain times when I got into the gas. Come to find out it was the u-joint in the driveshaft right behind the carrier bearing. Once changed, the car was super quiet and rolled a lot smoother, no vibrations, etc. Just thought I'd share "just in case". Good luck.
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  #3  
Old 10-15-2012, 05:38 AM
ALM168 ALM168 is offline
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Location: NJ
 
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Posts: 99
Mein Auto: Z3, e46, Ford Explorer
SMAY964,

I am also hearing a noise at higher speeds (with the cooler weather,now noticeable with the top up). I thought that it was the diff, but I do not get the normal change of sound when going around corners indicating a problem, so you got me thinking that it could be the U joint. I was planning on the changing the diff oil before winter so I will look at the U joint while the car is up on the jack stands.


Al
98 Z3, 2.8L, 43K miles
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  #4  
Old 10-15-2012, 08:04 PM
tohbi tohbi is offline
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Location: arizona
 
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Mein Auto: z3 '97 atlanta blue 2.8
loose mirror.
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  #5  
Old 10-16-2012, 04:51 AM
ALM168 ALM168 is offline
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Location: NJ
 
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Posts: 99
Mein Auto: Z3, e46, Ford Explorer
Not sure what you mean. The whole mirror assembly, or just the glass? I doubt that this is the problem as the noise seems to be coming from behind me. BTW - There is no vibration, just noise.


Al
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  #6  
Old 10-16-2012, 06:50 AM
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amancuso amancuso is offline
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Mein Auto: 128i, 330i, Z3 2.3, R56
My car has always (at least for the last 5 years) made a whirring sound on deceleration. I'm sure it's something to do with the driveline, but it's not bad enough to warrant changing anything yet.
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