306 D Turbo Clonk when braking?

pug_owner2002 · Post by **pug_owner2002** » 24 Apr 2006, 12:47

Hi,

My 306 makes a noise (clonk) when a brake.
It only does it when moving (will not make the noise when pressing the brake pedal whilst stationary).
I have checked for play in the ball joints etc but cant find any, the brake calipers appear to be secure as well.
Does any one know if this is one of the many common problems and if so what could be the cause?

Any help appreciated as the noise is getting annoying!

pug306 · Post by **pug306** » 24 Apr 2006, 16:19

That will be the wishbone bushes having excess play. Check both front o-bush and rear p-bushes with a lever for play. Easier to replace complete wishbones than bushes alone.

ralph · Post by **ralph** » 25 Apr 2006, 08:26

Or perhaps the pads moving slightly in the caliper?

batwad · Post by **batwad** » 27 Apr 2006, 12:16

I had the same problem on my old 306 and it turned out to be wishbone bushes. Replaced wishbone as pug306 says and problem solved!

pug_owner2002 · Post by **pug_owner2002** » 28 Apr 2006, 13:54

Thanks for the replys

I'll jack it up this weekend and have a look.
The noise doesn't always happen when applying the brakes but does it when i'm comming off the brakes.
I can also feel it slightly through the brake pedal.

jgra1 · Post by **jgra1** » 30 Apr 2006, 10:53

could be caliper sliding pins worn, so although the body of caliper is firm, the sliding part may be loose - seems to be happening on a friends 405

ralph · Post by **ralph** » 05 May 2006, 18:31

I should never have replied to this post - now my Xsara's at it

Yes, it's the wishbone bushes, the P bushes are split on both sides. No chance of just replacing them - they can't be bought separately, so I've had to fork out for two new arms at £41+VAT each.
Original Citroen arms cost over £70 each.
I'd have thought the wishbone arms would be the same as on the ZX and 306, but no. Even the Picasso has different arms. So that probably explains the cost.

pug_owner2002 · Post by **pug_owner2002** » 16 Aug 2006, 13:09

Hello all,

I know it's been a while since I started this post but as the missis an myself had recently brought a house so the car has been on the back burner in favour of decorating

Anyway having now investigated as I also had a rattling exhaust that was getting anoying as well I can say that the clonk was being caused by the exhaust.
I replaced the gasket between the front pipe and manifold and fitted new springs at the joint and hey pressto, no rattly exhaust or clonk when breaking

Only problem was the front pipe which is also that CAT snapped a few days later, so out came the welder as I didn't want to shell out £155 for a new one.

ssray · Post by **ssray** » 17 Aug 2006, 07:13

pug_owner you di=ont need a cat on a diesel chuck it in the bin and put a bit of straight thru pipe on it.
Ray