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The mkiv Supra Owners Club

Suspension knock/"spoing" sound. Diagnose from these pics?


bodilx6
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I'm having a strange "spoinnng"-ish sound from my left rear wheel arch. Originally I heard it years ago, but ONLY in the wet (?!). Then I had a CW suspension fitted by the man himself and it sort of dissappeard for a year or two. Now its back with a vengeance. Always there when I hit bumps on a camber or when I move off from a stop at normal speed. I don't hear it over 40-ish mph but that could be road noise cancelling it out. Not sure.

Doesn't sound like a "thump" but more as metal contacting metal, lightly, or some metal "releasing tension".

I've tried - by hand - to pull/push the suspension arms with the wheel off, but I dont see any apparent movement in the bushes except I can "slide" the arm a mm or so along its axis.

 

I wonder it is a bushing issue (if so, I'm contemplating replacing all arms but that is WAY expensive) or if i need to re-torque something (if so, what?).

 

Here are pics of most suspension joints/bushes.

 

http://idisk.me.com/stefanbovien/public/suspension/SUSP_01.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_02.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_03.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_04.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_05.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_06.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_07.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_08.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_09.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_10.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_11.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_12.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_13.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_14.jpg

http://idisk.me.com/stefanbovien/public/suspension/SUSP_15.jpg

 

Any input appreciated. I'm having a hard time figuring out how to diagnose this, so any ideas about that are welcome as well.

 

Thanks

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It *MAY* be the bush in the lower arm the damper stirrup bolts through is worn, but you can't buy them without buying a new lower arm. Similarly the top wishbone inner spherical bearings wear, and again, it's a new wishbone job. BUT I have to just guess here, nothing stands out as knackered in the photos.

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Thanks Chris, thats kind of what I was guessing to hear. I don't see anything wrong anywhere, but its reassuring that you don't see it either.

 

I'll soon get the chance to have Toyota DK's tech troubleshooting guru to take a ride with me. He might have an idea.

Else its going to be new whishbones from Toyota I think. Is there anything else that would be a good idea to replace in the same round?

 

Btw, anything on the springs I mailed you about for the OEM Toyota/Bilstein dampers? I will be near your place around the 12th or 13th of September I think.

/Stefan

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Sweet!

You just send me a mail and I can get the guy to send you some cash. I would rather do that so all is OK for pickup when I get there.

 

Oh, one thing; what should he expect after a lowering with your springs in combo with the bilsteins from the basic OEM suspension he is running now?

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