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Rear Suspension "Clack" - Drop Link?

I have a technical question regarding a current setup on my 88 951. Im running a 22mm Weltmeister rear adjustable sway bar (installed by the previous owner/shop) and my suspension/alignment guru locally has mentioned the drop links have play in them (the heim joint?). I dropped the car with them last week after trying to chase down some audible clack in the rear suspension on uneven/broken driving surfaces that is driving me crazy. Neither of the drop links have a jam nut currently installed either - wondering if this is unadvisable and possible causing some play in the link? I thought for the longest time the noise was either the front control arm ball joints (so I JUST rebuilt them) or the pillow ball/camber plates. I have now isolated the noise to the rear end - and shop is pointing me to drop links.

Anyone? I've emailed Weltmeister direct but looks like it is a generic webmaster address for their site.

1988 944 Turbo
Bilstein Escort Cups
Elephant Racing torsion bars w/ quick connect setup
Weltmeister 22mm rear adjustable sway bar
OE Porsche M030 Turbo S front sway bar

See above for an idea on the total setup and photos attached.

Old 10-31-2017, 10:21 AM
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Apologies - I realize the photos are rotated, but easy to see hardware etc still.
Old 10-31-2017, 10:22 AM
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heim joints when left exposed like that will inevitably get dirt particles stuck in their grease and as they move around (normal driving suspension cycling) the dirt will eat the inner/outer surfaces away.

if enough tolerance has opened up the central "ball" could certainly clack around.

if you put new joints on you can get dust boots...hard to install but they will prolong the life.

http://www.mooreparts.com/fk-dust-boots-seals/
Old 10-31-2017, 11:14 AM
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Nice. Does indeed looks like a struggle to install but worth it.
Old 11-01-2017, 09:29 AM
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I have the same set up on my car and there is no jam nut on my heim-joints either. While the open heim joint design does allow for dirt and grime to accumulate in them, there is a limited range of motion on the joint itself. If there was wallowing out of the heim joint, it would be visible as a shiny area, particularly where it has a layer of dirt over all. I was recently tracing a clack/clunk sound in the rear of my car and found it to be the outer cv joint making noise when the suspension geometry rapidly changed. The joint was worn but not audible under load yet.
Old 11-02-2017, 04:05 AM
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Awesome - how were you able to trace it down to the CV joint? Any manual movement/visual things I can check?
Old 11-02-2017, 09:01 AM
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Quote:
Originally Posted by lincolnturns View Post
Awesome - how were you able to trace it down to the CV joint? Any manual movement/visual things I can check?
I had the car on my lift and started trying to move everything I could by hand. There was noticeably more lateral movement in the axle on the passenger side. When I swapped axles side for side, my clunk magically moved to the driver side. The heim joints used with the welt' sways are pretty robust, I imagine it would take some significant time/mileage for them to wear enough to clunk.
Old 11-02-2017, 08:06 PM
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