Help Front Brake Squeal
Discussion
Hi All
Decided to try and sort out the dreaded front brake squeal today. I did the following:
1. Applied silicone sealant to the back of the pads about 1mm thick (let cure for 1hr before reassembly)
2. Applied copperslip to the 2 pins that hold the pads in, the parts of the calliper that are in contact with the pad edges and the spring device that presses on the top of the pads. I even put a light coating on the surface of the silicon sealant.
A couple of miles down the road the squealing appeared as loud as ever. For some reason my pads are silent for the first 2 miles.
What have I missed, if anything or am I to be cursed with this forever. It only started when I had new pads fitted at the last service, they are AP ones.
Any suggestions welcome
Kind Regards
Simon.
Decided to try and sort out the dreaded front brake squeal today. I did the following:
1. Applied silicone sealant to the back of the pads about 1mm thick (let cure for 1hr before reassembly)
2. Applied copperslip to the 2 pins that hold the pads in, the parts of the calliper that are in contact with the pad edges and the spring device that presses on the top of the pads. I even put a light coating on the surface of the silicon sealant.
A couple of miles down the road the squealing appeared as loud as ever. For some reason my pads are silent for the first 2 miles.
What have I missed, if anything or am I to be cursed with this forever. It only started when I had new pads fitted at the last service, they are AP ones.
Any suggestions welcome
Kind Regards
Simon.
Doesn't need to be much, literally just a mm or two. I've read/heard that if the pad is sitting completely flat to the disc, this is what can cause the vibration, so the chamber just helps stop that. Or something along those lines. I've heard other reasons, but its worth a shot, and has worked for other people.
Silicon for rattling pads, and coppaslip for everything else. Not sure what you did there with yours, as it sounds like you let it cure then fitted pads? Need to silicon onto the pistons. If you did silicon, let cure, then fit, you'll have to start again.
Squeal is associated with pad compound. More pronouced on some makes than others. Worth cleaning the cross-drilled holes out with a battery drill, as the holes will help clean some of the resin away when it surfaces.
Squeal is associated with pad compound. More pronouced on some makes than others. Worth cleaning the cross-drilled holes out with a battery drill, as the holes will help clean some of the resin away when it surfaces.
Hi All
Thanks for the replies, finally sorted out today.
Removed front pads and chamfered all the way round the pad material about 1mm. Removed all silicon sealant from pads and Coppaslipped them along with slideways in the callipers, all pad pins, areas of spring clip that comes into contact with pads and spring pins and down front and back edges of the metal part of the pads.
They seem to be cured, how long for who knows but it's only about an hour to do both sides and an ideal opportunity to clean front wheels properly.
Happy for now
Simon
Thanks for the replies, finally sorted out today.
Removed front pads and chamfered all the way round the pad material about 1mm. Removed all silicon sealant from pads and Coppaslipped them along with slideways in the callipers, all pad pins, areas of spring clip that comes into contact with pads and spring pins and down front and back edges of the metal part of the pads.
They seem to be cured, how long for who knows but it's only about an hour to do both sides and an ideal opportunity to clean front wheels properly.
Happy for now
Simon
Glad to hear the problem has been solved (if only perhaps temporarily). Obviously will generally driving the brake pad will wear and the chamfer will be removed, so it will have to be redone in X amount of miles, but at least that keeps your brakes tiptop and stops brake caliper bolts from seizing, etc!
Hi Again
My pads are AP ones fitted to the standard later type AP calipers. Has anyone had any experience of any other brand of pad which they have fitted and NEVER had any squeal problems with. Just that I may consider changing them if I get fed up with re-chamferring them every x amount of miles.
Regards
Simon
My pads are AP ones fitted to the standard later type AP calipers. Has anyone had any experience of any other brand of pad which they have fitted and NEVER had any squeal problems with. Just that I may consider changing them if I get fed up with re-chamferring them every x amount of miles.
Regards
Simon
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