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Old 11-11-2018, 09:12 PM   #1
Rom
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Loud clunking sound over bumps

Hi all,

My 99 2.5L is making some weird loud clunking sounds over bumps, which sounds like the rear passenger side. Iíve lifted the car and inspected everything, tried moving the wheel up and down, checked for any loose suspension bolts, but nothing apparent.

I know the control/caster arm bushing sometimes wears right under where the passenger door ends and causes weird noises, but the sound does seem to be coming from much further back. Driving on a smooth road is quiet - just any bump clunks loudly. Handling does not appear to be compromised at all.

The car does have PSS9 coil overs and Tarett drop links, as well as adjustable toe control arms, but all that has been checked and appears tight (at first I thought the suspension top mount had come loose).

Anyway, any other ideas as to what it could be? I thought maybe the anti roll bar bushings, but they seem okay. I might disconnect the drop links and drive around to see if it changes.

Any ideas appreciated!

Thanks!

S.

Last edited by Rom; 11-11-2018 at 09:15 PM.
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Old 11-12-2018, 03:59 AM   #2
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That sounds like the situation I had before I changed my rear control arms. Clunk went away after that.
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Old 11-12-2018, 05:08 AM   #3
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A very simple test to verify that it is the read control/trailing arms is to either brake or accelerate over a bump. If the rattle diminishes greatly or disappears than it is confirmed. If not, it must be some other suspension component.

If it is the trailing arms they are easy to replace yourself as long as you have a good set of sockets, a breaker bar and a big torque wrench. The bolts take a lot of torque, up to 118 ft lbs.
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Old 11-12-2018, 05:52 AM   #4
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Thanks guys, especially Anker as I've been looking for a way to confirm the issue. I'll see if that works for me. If anyone knows any other positive tests I can do to confirm, would be much appreciated!

S.
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Old 11-12-2018, 05:53 AM   #5
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Does the noise go away when the car warms up?
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Old 11-12-2018, 11:14 AM   #6
Rom
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Quote:
Originally Posted by DWBOX2000 View Post
Does the noise go away when the car warms up?
Nope - temperature does not seem to affect it at all...

Thanks!

S.
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