Rear Sounds Loose + Added Knocking

[SharpyClio]

Okay, so maybe an odd one. After fitting the new rear beam with Polybushes it sounds like something is loose at the back when going slowly over bumps, in addition when cornering around roundabouts there is a side to side knocking, almost like a socket under the seat (there isnt).

I have been round and double checked all the bolts are torqued to spec but its still there, I am wondering if the K-Brace is somehow linked to it but I was also curious if anyone had any other ideas / experiences.

The other thing I wondered is if it could be he rear axles sliding on the polybushes somehow, but I can't see that being the case. Either way the car feels tight enough and handles well so I am confused.

 

[Louis]

Fuel tank fully in correct place?

Rear springs seated properly?

Rear shocks fully tight?

 

[SharpyClio]

Fuel tank fully in correct place?

Rear springs seated properly?

Rear shocks fully tight?

Didnt move the tank so hope so!

I will Triple check

Yes

 

[Krarl]

Probably rear shocks

Mine came loose after putting new springs on. Needed rattling with the impact gun, the bracket for my rarb had jiggled and come loose

 

[R3k1355]

Have you got the car on jack stands or on ramps?

 

[SharpyClio]

At the moment its on the ground. Normally have it jacked up

 

[SharpyClio]

Probably rear shocks

Mine came loose after putting new springs on. Needed rattling with the impact gun, the bracket for my rarb had jiggled and come loose

Just checked the shocks and they are really tight, like a tiger.

 

[R3k1355]

Not the exhaust banging about is it?

or something in the boot? 🙈🙈

 

[SharpyClio]

Not the exhaust banging about is it?

or something in the boot? 🙈🙈

ha! I only have a spare wheel in the boot with no back seats, that said I have checked the boot area again as I have had sockets under seats before! 🤦‍♂️

Exhaust is nice and secure also.

 

[SharpyClio]

Think I might jack the car up and then just check all the nuts and bolts again that I can't get to with it on the ground.

 

[JamesBryan]

I had this when I used to run Koni adjustable shocks.

Sounded like the damper shaft that bolts at the rear top mounts was rattling from side to side.

Never did manage to sort it.

No noise since moving to BC coilovers.

 

[SharpyClio]

I had this when I used to run Koni adjustable shocks.

Sounded like the damper shaft that bolts at the rear top mounts was rattling from side to side.

Never did manage to sort it.

No noise since moving to BC coilovers.

Sounds like I to replace my standard shocks with coilovers, just to see if that helps... obviously. 😄

 

[JamesBryan]

Sounds like I to replace my standard shocks with coilovers, just to see if that helps... obviously. 😄

Try backing all the bolts off and then torquing them up under load (which is the proper way).

 

[SharpyClio]

Try backing all the bolts off and then torquing them up under load (which is the proper way).

Top mounting bolt is only 20nm!! Might be overtight...

 

[JamesBryan]

Top mounting bolt is only 20nm!! Might be overtight...

I've never torqued that, just nipped by hand.

 

[SharpyClio]

I've never torqued that, just nipped by hand.

okay, so thats one thing! I've done them a shade tight.

 

[JamesBryan]

okay, so thats one thing! I've done them a shade tight.

The torque setting is probably just there to stop you stripping the threads 😂

It's only holding the shocks in place when on full droop/jacked up.

Loosen it a bit and see if it makes a difference. Can't see it being that though

You'll prove me wrong now you watch 😅

 

[Krarl]

I rattle mine tight with the impact 🤷‍♂️

 

[JamesBryan]

I rattle mine tight with the impact 🤷‍♂️

Mode 3 and send it 😂

 

[SharpyClio]

Im going to do one finger tight and one with the impact... surely thats the best of both worlds!

 

[SharpyClio]

Okay, so I have removed the k-brace and refitted torqueing to the correct spec, what I also did is remove the rear carpet that sits under the spare wheel (leaving only the carpet for my seat removal), that means the wheel isn't being pressed on by the k-brace. I then took it for a drive and it seems better, not 100% sure its resolved the condition but going up the lane and zig-zagging I didn't hear the noise.

Driving the Scotland today in it, anyone hazard a guess on if I will make it?

 

[npt]

Did you check for movement on the new axle bushes with a pot bar, that's where I'd start, there isn't much that can go wrong 🤣

 

[SharpyClio]

Did you check for movement on the new axle bushes with a pot bar, that's where I'd start, there isn't much that can go wrong 🤣

No going to lie, it worries me with so little that could wrong that is making a noise. I’m actually now wondering if it’s the hand brake cable outer getting pulled over the tank as that was mega tight. Will have a look when I get back from Scotland.

 

[Bankrupt_drunk]

No going to lie, it worries me with so little that could wrong that is making a noise. I’m actually now wondering if it’s the hand brake cable outer getting pulled over the tank as that was mega tight. Will have a look when I get back from Scotland.

Did you ever sort this out? I've just put poly bushes on my rear axle and now have exactly the same symptoms. There's not many thing to go wrong at the rear. I can't feel any movement in the bushes, I've swapped the shocks, all the nuts and bolts are done up tight, I've taken the toolkit/spare wheel out, checked the exhaust isn't hitting the beam and that the fuel tank is secure.

 

[SharpyClio]

Did you ever sort this out? I've just put poly bushes on my rear axle and now have exactly the same symptoms. There's not many thing to go wrong at the rear. I can't feel any movement in the bushes, I've swapped the shocks, all the nuts and bolts are done up tight, I've taken the toolkit/spare wheel out, checked the exhaust isn't hitting the beam and that the fuel tank is secure.

Erm… so for me either something fell, off I’m used to it now and ignore it or it fixed itself. Sorry not a great answer.

 

[Bankrupt_drunk]

Erm… so for me either something fell, off I’m used to it now and ignore it or it fixed itself. Sorry not a great answer.

No worries. I'm reasonably confident on mine that nothing is about to fall off, just the knocking is really annoying.

 

[SharpyClio]

No worries. I'm reasonably confident on mine that nothing is about to fall off, just the knocking is really annoying.

I was the same. Doesn’t seem to impact the handling and everything was tight so I gave up looking.