Knocking noise from rear caliper?

Draeger

Draeger

Draeger

Soldato
Joined
4 Feb 2004
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Location
Écosse
Had our main family workhorse - Peugeot 4007 4x4 in to get brakes looked at at a local main dealer as they were making a screeching noise from the rear brakes. Had new pads, shoes and discs fitted to the rear in October 2015. Not done many miles since then.

Anyway, the rear brakes were stripped down, cleaned and regreased where required and all was fine. Then a few days later, I noticed a knocking noise coming from the rear nearside caliper (completely different noise from the first screeching noise it went in for initially). If you grasp the caliper body you can actually wiggle it left and right by a couple of mm and replicate the noise even though the bolts and slide pins appear to be tightened up securely. Offside caliper, by comparison, is solid and cannot be moved.

Needless to say, car was taken straight back to dealer who unsurprisingly agreed there was something amiss and checked it out. They informed my missus when she went to pick it up later that day that they had fitted a new caliper 'slider kit'. The noise seemed to have gone but the next day, it was back again. Car is booked back in to dealer on Wednesday next week to have another look at it. Any ideas what the problem could be folks? I've Googled for answers and some folk are saying that a slightly warped disc could be the cause?

Ta. :)
 
Probably pay in the bolts holding the caliper inside its housing. I'd have the have a look at the rubber gaskets and see if they are torn. If they are worn have a look at the guide holes. I had a Megane which made similar because of excessive play and it had ovaled the holes so the caliper was moving about under braking.
 
Draeger said:
Cheers m8. Replace the bolts maybe or could the 'oval' be in the caliper mounting holes themselves?
Click to expand...

When you say you can move the caliper left and right, do you mean in a direction towards the front and back of the car, or sideways towards the left and right hand sides of the car?

Assuming the first then either the holes in the caliper carrier are worn (the ones that the pins slide in) or the carrier isn't securely bolted to the rear upright. If the carrier doesn't move then it's going to be worn holes.

If the latter, then there should be a little bit of movement in that direction providing the handbrake is no applied.
 
It moves towards the left and right side of the car and when you do so using your hand, it replicates exactly the sound it makes whilst on the move and the brakes are gently applied. Apply a little more pressure and the noise vanishes. Back off slightly and it returns. It's defo not just normal play in the caliper. I've also noticed that it doesn't do it at all when cold, takes a few miles and a good few applications of the brake pedal until it begins.
 
Brief update on this, car was back at main dealer today. It had the offending rear caliper and associated components removed, stripped and cleaned once again. They checked everything out including brake disc tolerances as far as a possible warped disc was concerned and found no issues. Everything was then refitted and a road test carried out. The technician was satisfied there was no issue. The only thing the service desk reported to me when I picked the car up was that they had used CV Joint grease on the slider pins this time as the Coppaslip wasn't perhaps 'up to its job' there.

The upshot is I drove the car the long way home and could not hear a thing from the rear brakes. So sorted for now, but time will tell.

Oh, and they charged us nothing for the work/investigation/labour. Which was nice.
 
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