thats correct and they do look to be quite thick on the polybush ones, given my schedule Ill likely be looking at doing something in November, if I do end up replacing them with polybushes I will try to document it for a how to guide.
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I found the video that shows how the top washer rubs through to the metal and causes a rattle:https://www.youtube.com/watch?v=tDs8U7NRtcw
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I believe that rubber part on top of the compliance bush is what has worn through allowing for metal to metal contact which causes the noise
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I have been looking into it for a few months and I have changed the rose joint style bushes on the upper arms and shocks and the ball joints on the hubs. I cant find it at he moment but there was a youtube video that detailed the same noise in which he put a rubber disc on top of the bush that fixed the issue, so I am considering removing a trailing arm to ensure that is whats causing it, but that's quite a big job in itself
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my thoughts too, its only on certain bumps like speed bumps that seem to cause it.
At least from what I can see from the design of the bush it seems more of an issue of the suspension design. As all of the lateral arms allow rotation in more than one direction, the job of constraining the rear Hub's rotation around that axis is also one by the trailing arm, and as the arm is only fixed at on place this also doesn't fully constrain it. that is in my mind why there is a flat plate on the trailing arm where it sits on the bush to stop it from 'complying' left and right as it were. this naturally over time wears down the rubber it sits on till it reaches the metal.
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My main reason for wanting to replace them is the clunking coming from the rear which is mainly on the left side but also occasionally on the right, having read online it would appear to be because the rubber on the top of the bushing has worn down to the point the metal of the trailing arm hots the bushing assembly.
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I'm not sure how worn the bush is but it does have the tell tale clunk that the rubber ring around the top has worn to the point the trailing arm can hit the bushing assembly causing a clunk and also a rattle when setting off. It has been mentioned that you can bodge this with bits of plastic or cutting and making a rubber shim but I'd rather replace bushing and the ring as the car has about 130k miles so its most likely work as well.
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Thanks for the info, do they only come out one way, I assumed the have to come out upwards if they were in the car?
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I doubted it would be an easy job having had the fun of already replacing the rose joint type bushes at the rear with a threaded type press/puller, I have seen some videos of drilling out bushings in other cars which might work, Ill contact polybush and see if they have a guide.
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Does anyone have any experience changing the compliance bushes on an MGTF to polybush ones like these found on Rimmerbros https://rimmerbros.com/Item--i-RGU00024050PBO ?
Can it be done with the bushing holders on the car with a simple threaded bushing press/puller?
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