Rear squeak over shallow bumps

[pillow]

Hi all,

Getting a squeak in the rear over small, sharp bumps. The noise can be heard through the top nut of the strut on the rear shelf.

Tried refurbished struts, no change.
Just had 4 new control arms each side, small change possibly.

The only thing I haven't had changed are the trailing arm bushes which are pressed into the subframe on one side, and the wheel carrier on the other. Could these possibly be the culprits?

Anyone know how difficult they are to change?

Many thanks

 

[moodi]

Ball joints?

 

[pillow]

Ball joints?

No ball joints in the rear. Theres an axial joint at the bottom of the strut but that is nice and solid.

 

[pillow]

Update for anyone that stumbles upon this thread. Had the spring link bushes and the spring link itself changed today... No change.

I was on the cusp of throwing in the towel on it. I whimsically decided to use some cheap foam sound insulation I purchased on eBay and carefully cut and slotted it in under the rear shelf above each of the struts. Completely unable to hear the noise any more. Either the factory foam insulation under the rear shelf is shot and was allowing a normal suspension sounding noise into the cabin or I'm just masking up a potential issue. Regardless the cabin ambiance is no longer broken by the sound of a rubbery squeak and despite having spent the best part of £2k in parts for all of the rear arms and subframe bushes I am pleased.

Hope this helps anyone who stumbles upon this thread.

 

[Flyinspanner]

Get some spray white lithium grease and spray all the bushes and joints at the rear.

 

[pillow]

Get some spray white lithium grease and spray all the bushes and joints at the rear.

All of the joints in the rear are new.

I am suspecting it is just a normal noise from the strut which wasn't being insulated properly by the foam.

 

[Germgh0st]

Interesting. I had a similar squeak from the rear passenger side after Mercedes replaced all of my tyres. Only happened for a few miles, once the car and tyres started to warm up it stopped, and it only happened if I drove over one of those 'bus friendly' speed bumps, the ones with the gap in the middle, and only if I drove over it with the inside edge of the associated rear tyre. Twice it went back, twice they said nothing was wrong with it. It didn't do it before you fettled with it I said...even got to the point of complaining to customer services. Then, just a few days ago, it stopped completely. I'm wondering if them jet washing it (I asked them to do nothing else,no contact washing) dislodged something and it's re-settled or something got too clean and now it's greasy again.

 

[optimusprime]

A few tins of silicon spray is what you need to lube all rubber bushes to keep them supple .That will go for the new ons also ..