Knocking noise

[mt308]

From the rear of the car, if I push the car up and down, there is a loud knocking noise coming from somewhere towards the back of the car in the engine bay. Seems to be worse if I push down on RH side but still apparent if I push on LH side.

I just spent half and hour trying to pin it down but I can't....wherever I put my ear the noise seems to be coming from elsewhere!

I wonder if it could be suspension bushes that need some lubrication - but would this be more of a squeak than a click/knock?

My concern is that there is something loose somewhere, though nothing obvious that I can see.

Any thoughts, maybe someone else has had the same?

Thanks

Mark

[mt308]

Poly bush suspension. Have spent the day removing all 10 bushes, repacking with silicone grease. No difference (though probably a good thing to do as they seemed quite dry).

I can feel the click coming up the right hand rear chassis rails (not the left hand ones - though if I bounce the left I still get the noise).

No louder if I really get the car bouncing.

Sounds like metal touching metal but I can't see anything at all and can't find where its coming from. Its a click/knock type sound. Not a squeak.

Could it be within the gearbox I wonder - or the clutch. Both work fine though!

Very frustrating - my concern is that something is loose somewhere (which you don't want in a 700hp car!).

Any way to eliminate it being the damper?

Thanks

Mark

[mt308]

I've just swapped the dampers over and noise now definitely has swapped to the other side. So pretty sure its a damper unit.

In a way it's a relief as there is a lot of expensive stuff under the back there!

[mt308]

Racing Roj said:

On this subject I gave the same 'metallic' knocking noise on the front left. Does any one know who to go to for having the dampers checked out. I am in the south Manchester area.

Swapping them right to left worth doing if you haven't already as that will confirm or otherwise. There are a multitude of other reasons for a knocking noise. I think my bonnet hinges rattle, but hard to pin it down. One day the whole car will be totally quiet!