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-   -   mysterious clunk solved, might suprise you what it was... (http://forums.pelicanparts.com/porsche-911-technical-forum/403647-mysterious-clunk-solved-might-suprise-you-what.html)

gunlover05 04-13-2008 10:47 AM

mysterious clunk solved, might suprise you what it was...
 
I've had a mysterious soft clunk coming from my passenger rear wheel area, specifically around the springplate or most likely the torsion bar/bushing...only heard when going oververy slow speed bumps, like backing out of my garage and bouncing the rear passenger side bumper...kind of a very soft knock, or soft clunck....when i had my friend bounce the rear bumper, I could feel/hear it coming from the torsion bar/bushings/springplate, no where else..I didn't have any sound from drivers rear at all...sound was not too loud, but bothered me enough to worry about it....

I had replaced all suspension bushing/torsion bars this winter with quality parts (see signature), and aligned myself with Scruggs method...ended up with 2.6 degrees camber on passenger side rear, 2.0 on drivers rear and had left it that way for a while. :rolleyes:

...after greasing the bushing again and checking all bolts and everything i could imagine back there, i just tweaked my passenger rear camber back down toward the drivers and ened up with 2.25 degrees, and guess what, the clunck sound has almost completely disappeared!! Noticeably better.

Anyone know why?

gunlover05 04-13-2008 10:54 AM

Quote:

Originally Posted by gunlover05 (Post 3884004)
...after greasing the bushing again and checking all bolts and everything i could imagine back there, i just tweaked my passenger rear camber back down toward the drivers and ened up with 2.25 degrees, and guess what, the clunck sound has almost completely disappeared!! Noticeably better.

Anyone know why?

to clarify, I had checked bolt/nut tightness in the past to try to figure out what the noise was, with no evidence to point to the noise. Only today when i moved the camber from 2.65 to 2.25 did the noise almost disappear...

could the torsion bar to springplate or ERP bushing have been in some kind of bind at 2.65 degrees, causing the noise? wouldn't think so, but....

Elombard 04-13-2008 11:11 AM

how about super worn banana bushing less camber less thrust angle pushing it around?

Or maybe the axle is worn out?

gunlover05 04-13-2008 12:23 PM

Quote:

Originally Posted by Elombard (Post 3884038)
how about super worn banana bushing less camber less thrust angle pushing it around?

Or maybe the axle is worn out?

noise wasn't coming from the bannana bushing or axle...was sure it was the spring plate/torsion bushing area...


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