So confused!

[944Fripp]

Just assembled and put the new CV joints on. Took it for a spin and it's still making the same knock!

It happens under hard (ish) cornering to the right only and is louder the faster I corner. Cornering to the left is absolutely fine and the knocking is deffinately coming from the back of the car.

The spare and Jack are secure as is the battery. Anything not screwed down has been taken out of the boot.

I jacked it up again pulled and pushed both wheels at top and bottom and left and right, it's all solid.

Any ideas?

Shame, it's deffinately not coming to Goodwood with me on Saturday.[&o]

 

[944Scott]

Does it sound like a one off knock or is it a constant clicking or clunking? If its the first have you checked you battery is not moving around or if there is anything rattling around under your battery tray?

 

[Monkeythree]

I would check the mounts for the rear axle. Not the main bushes at the front but the secondary mounts at the end of the alloy carrier arms. Mine fell apart in my hands when I removed them to drop the rear beam. They are simple to remove to check for integrity or just get in there with a pry bar and see if they are still in one piece.

 

[Waylander]

and if they are dust, save up best part of £400, second hand ones are hard to come by or you can buy solid replacements. Have you loaded a bloke in the boot and gone for a drive to see if you can pinpoint the noise, done that a few times in the past, car interiors have a bad tendency to reflect noises and can be hard to pinpoint

 

[peanut]

sounds like the rear passenger side wheel bearing is failing.[] The only other time I have heard a similar knocking noise was when my wheel nuts hadn't been tightened properly.

 

[944Fripp]

OK, I've now had the entire of the back of the car examined by my local indie. They have passed it as being all A*! In one respect that's good as I can continue to drive with confidence, on the other, the knock is still very much there!

However, I was driving it on Saturday with some vigor around a roundabout and it knocked quite loud, I think I felt it through the front of the car and maybe even the steering! I got my friend to accompany me and he is sure its on the passenger side in the centre of the car. All extremely confusing; always on the passenger side, sometimes from the back (although I accept sound travels around a chassis), perhaps from the front end, perhaps the centre of the car, definitely outside of the cabin but always on a right hand corner only! Nothing under braking or acceleration!

My initial thought is now to get the front up on jack stands and have a good look under there; maybe an ARB bracket or a completely failed ARB bush or drop link?! It may also be worth jamming something around the exhaust tunnel to see if it's that as it travels the entire length of the car.

Any other thoughts? The sound is a loud clunk, it gets louder and can happen more than once the faster you go round a right hand corner only, nothing on left hand corners and only as the suspension is loading up, no sound at all as it unloads. It's coming from the left hand side of the car, sounds heavy and isn't related to wheel rotation or engine revs.

Here's hoping for some pointers once again!

Thanks all.

Tom

 

[Hallsy]

Does it clunk once as you shift the weight, or does it continue to clunk once the weight is shifted?

If the former, could be the exhaust hitting the body maybe? Front ARB mounts can snap, so worth looking at those as well, as you mentioned.

 

[944Fripp]

Does it clunk once as you shift the weight, or does it continue to clunk once the weight is shifted?

If the former, could be the exhaust hitting the body maybe? Front ARB mounts can snap, so worth looking at those as well, as you mentioned.

No, it clunks as the weight is shifted under load and that's it, while going round a corner it doesn't make a noise unless I hit a bump or corner harder part way round. I've not had a chance to get under there yet; hopping to do it this weekend.

 

[zcacogp]

Sounds more suspension-related than drive-related.

What rear shocks do you have?

Oli.

 

[944Fripp]

Sounds more suspension-related than drive-related.

What rear shocks do you have?

Oli.

I agree, I'm thinking ARB bushes now and perhaps the sound has travelled...or I've got wonky hearing. []

Re Shocks: Er...pass. Whatever they were when I bought the car 5 years ago. Not sure if they're the originals. My Indie did check them and said they were fine.....

 

[944Fripp]

Found it!



Anyone know where to order one from other than OPC?!

Also found play top and bottom of the drivers side front wheel so think I need a knew balljoint. Am I right in thinking that the whole wishbone has to be changed or can it be done without changing the Ali wishbone?!

 

[pauljmcnulty]

Hi Tom,

Somewhere like Rose Passion will sell them, but why not try a PC first? Chances are they're cheaper, and more likely to send the right part!

Clip is one size, but the bushes come in different sizes. My S2 was 25.5mm but worth checking yours.

Wishbones are best exchanged through Hartech IMO. The kits are cheap, but there have been failures with them.

 

[944Fripp]

Hi Tom,

Somewhere like Rose Passion will sell them, but why not try a PC first? Chances are they're cheaper, and more likely to send the right part!

Clip is one size, but the bushes come in different sizes. My S2 was 25.5mm but worth checking yours.

Wishbones are best exchanged through Hartech IMO. The kits are cheap, but there have been failures with them.

Never used Hartech before. I've had the car for 6 years now, how can I not have known about these folks?! Thanks Pual.

So, I grabbed the top and bottom of the wheel when it was up on jack stands and there is some play and an audible knock. I grabbed the wheel left and right and there's no knock. Is it safe to assume that it's not the bearing and likely that it's the ball joints on the wishbone then? Is there a sure fire way to tell? The car is still on jack stands...

I was planning on contacting my local PC for the part but the parts dept is closed after 1pm on Saturday and closed completely on Sunday. Just being impatient that's all as I'm excited to have found the problem...I hope! []

 

[white944]

Top and bottom is more likely to be wheel bearing. Get someone to press the brake pedal and see if the movement goes away to confirm.

 

[944Fripp]

Clip is one size, but the bushes come in different sizes. My S2 was 25.5mm but worth checking yours.

Paul, what dimension are you measuring there? Is that the external dim of the bush? How do you know which one you need and do I need to change the bush?!

 

[white944]

The diameter of the anti roll bar. Replace the bush if it's obviously worn ot perished.

 

[peanut]

you had the entire back of the car inspected by your local indie and they didn't spot that ! ???

Glad you got it sorted anyway

 

[944Fripp]

you had the entire back of the car inspected by your local indie and they didn't spot that ! ???

Glad you got it sorted anyway

Yep! They've never let me down before and I was very specific about looking at the back of the car. Still, given my mechanical prowess they'll certainly be suitably embarrassed!