I've been getting clunking from my brakes when going from drive to reverse or reverse to drive, so had a close look at the pads today to find the problem.Both inner pads had delaminated and were slopping about.I will be taking them back to the supplier and avoiding Pagid in the future.

 

They look plain worn out to me, not defective design or manufacture. Your annual MOT didn't catch this?

 

Pagid has a superb reputation. They have been known to contact customers from boards to make things right. What mileage did these have?

 

Those just look really worn out

 

With that kind of differential between inner and outer
I would suspect stuck caliper or piston.

 

Just fyi i just replaced my brake pads on my 1999 xk8 and decided to go with the upgraded ceramic pads. They do not fit. They're to fat. Tried everything. Even drainung all brake fluid to nust get a tiny bit more room. Didnt work. I ended up eith the $89 oem pads. $89 really? For brake pads.

 

Be willing to share the brand and part number of the "fat" ceramics?

 

I bought Shims when I bought pads and new rotors. I wasn't able to get the shims in with the new pads/rotors so I didn't use them.

I think I also put a chamfer on the ID of the pads with an angle grinder to get them to slide on to the disk.

I remember it wasn't easy. Stops great, however with no noise or dust. I think the pads I used were $14 close outs from rockauto.

 

Some more info, the outer pads have about 1/3 of their thickness left, the inner, about 1/4. However I have had this clunking for a fair amount of time, I thought it was just the pad shifting in the calliper, so I was pretty surprised to see that the pad had failed.


The piston on both callipers pushed back in fairly easily, however on the first piston it would not push back all the way (about 2mm short so could not put in new pads) so I removed it from the car and removed the piston to inspect. It had a fair bit of corrosion on it but the rubber boot was sound and after cleaning out the calliper it all went back together ok.


I have ordered a calliper repair kit and will change this out when it arrives and make a short video.

 

It didn't, it was worn out. The pad in the upper left is missing material from being applied irregularly. The problem is with the caliper not the pads.

 

For sure it was being applied irregularly, it was detached from the metal part of the pad and was being knocked about.


I will show a picture of the thickness of the pads later and you will see that the top right is not thin and has detached.


Both pistons pushed back into the callipers and were not seized.


Rather than just making your proclamations please add a bit of your thought process on this.



Are you saying that a seized calliper will lead to a detached pad? In my experience of seized callipers in the past the pad did not detach.

 

I tend to rate the 'bluster' answers as low reliability and those that take care and time to explain their thoughts as high reliability.

So here is a video of the caliper teardown.


And here is a pic showing the pad thickness.

 

Mmm. Pads are somewhat worn but still meaty enough to work.

For whatever reason, the bonding betwen the pad and the backing plate has failed. I've never had that issue over the years, and I too would be concerned. If the pad fell out you'd be using the backing plate as friction material

Just my 2p

Mike

 

I recently had this happen on my son's ZR2 Blazer, but he took it to the next logical step. The pad material fell off, which then allowed the pad to fall out of the caliper, and then the piston became friction material - until it also fell out of the caliper.

He tells me "the Blazer won't stop". The brake light is on and there is zero fluid in the rear circuit. Good thing brakes are redundant.

 

I've run Wagner ThermoQuiet brake pads on all of our vehicles for many years now. Great bite, tomb-like silence, relatively low dust, they wear evenly, and the price is right. Check 'em out before you decide on your replacement choice....

 

Just my 2cents but, I've read many of RD's posts...he knows his cars and his mechanics. If he reports the calipers were not the issue... they were NOT the issue. I personally have never seen two pads on a caliper wear exactly to the same thickness, one is always worn more. I will say this for certain, the friction pad should NEVER-EVER de-laminate from the backing plate. RD is correct, those pads were FAULTY! I am about to do pads and drilled/slotted rotors soon... we will see how it goes for me?????

 

Just out of curiosity, if you drive an XK8 more like a grand tourer as opposed to a sportscar, how long should a set of brake pads last? With my other cars, I've gone well over 50K

 

Sorry, I know it's deadly serious but I had to laugh. What is it about kids? The only 'maintenance' my son can manage is to top up with diesel...

Apologies for going OT.

Mike

 

To be honest I'm pretty embarrassed about how long I put up with the clunk (6 months) before I investigated.

 

Just off on a tangent here but are you sure the pads were genuine Pagid and not a far east clone? There were a lot of pirated parts around at one point.