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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #26  
Old 01-12-2013, 03:53 PM
rdl rdl is offline
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Location: Ontario, Canada
 
Join Date: Jun 2010
Posts: 1,026
Mein Auto: 530i 2003
Quote:
Originally Posted by superwashcycle View Post
Well, this guy turned out to be right.
...
A quarter inch ride height drop will raise the other side of the car the same amount.
...
The springs keep the car up, not the struts, but they can make that quarter inch difference.
...
Congratulation on your success. It's an interesting result since all alignment angles were in spec, yet the car demonstrated a pull to one side.

FWIW, the drop on one side did not raise the other side. The only way that could happen would be if the car were supported in the middle, similar to a teeter totter. Also, the monotube style shock part of the strut assy does contribute to the spring effect. Apparently the shock lost pressure and the spring had to take more of the load. The only way the spring could do that is to deflect more, which meant that side sank.

And thanks for reporting back on the resolution. Many don't bother & we're all left wondering what the root cause was.
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RDL
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  #27  
Old 01-12-2013, 07:00 PM
superwashcycle superwashcycle is offline
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Location: Irvine
 
Join Date: Aug 2012
Posts: 56
Mein Auto: 2003 530i Sport Premium
Quote:
Originally Posted by rdl View Post
Congratulation on your success. It's an interesting result since all alignment angles were in spec, yet the car demonstrated a pull to one side.

FWIW, the drop on one side did not raise the other side. The only way that could happen would be if the car were supported in the middle, similar to a teeter totter. Also, the monotube style shock part of the strut assy does contribute to the spring effect. Apparently the shock lost pressure and the spring had to take more of the load. The only way the spring could do that is to deflect more, which meant that side sank.

And thanks for reporting back on the resolution. Many don't bother & we're all left wondering what the root cause was.
I think what I meant was that the camber difference on one side affected that of the other, demonstrating a tilt. Why I talked about ride height is beyond me.

If you're ever in Irvine, CA, I owe you a beer.

I figure I wouldn't have hit that curb if my headlight adjusters weren't busted. And the story goes on.
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