edkin Posted October 15, 2019 Share Why don't you just replace the pads with new ones? they are cheap enough. Sarge, DieselnDust and Greybeard 3 Link to comment Share on other sites More sharing options...
MORNE Posted October 15, 2019 Share Maybe just burn the whole bike?good degreaser as well as paint stripper. Link to comment Share on other sites More sharing options...
droo Posted October 15, 2019 Share If you've tried replacing just the pads, your rotors may be contaminated as well, and also need replacing. If you replace rotors, replace pads at the same time - contaminated pads will contaminate new rotors too. DieselnDust and Greybeard 2 Link to comment Share on other sites More sharing options...
dave303e Posted October 15, 2019 Share can always try copper slip to the back of the brake pads? Link to comment Share on other sites More sharing options...
Greybeard Posted October 15, 2019 Share Does this only happen when you use the brake? If it happens without you using the brake it can also be your bearings in your hub(s) that needs some grease.Only when braking. Link to comment Share on other sites More sharing options...
DieselnDust Posted October 15, 2019 Share can always try copper slip to the back of the brake pads?Although in theory this can work , using any grease is problematic in that you cannot control the conditions that can result in oil weeping from the soap or thickener component of the grease. Then you have contaminated pads and rotors all over again Greybeard 1 Link to comment Share on other sites More sharing options...
Ed-Zulu Posted October 15, 2019 Share I have Shimano Hydraulic brakes that are giving me the squeal treatment.The pads are still in good condition and the Icetek rotors are not scarred or showing any wear. ( The bike has not worked too hard) I went through the process of cleaning everything with alchohol and I also lightly sanded the pads and the rotor surfaces. The rotors don't appear to be "warped" and I check the equal clearance when remounting the wheel.Is there anything I might have missed? One thing, the bike hung in a garage for a few years and I did give it a good clean before using.I haven't read the replies here but had a similar issue with Shimano brakes recently on a new bike, believe it or not. After trying everything the interwebs suggested I came up with still screaming brakes. It turned out that the wrong model pads were placed in the calipers. They were slightly shorter that than the later specified pads (the later model pads had a slightly longer attachment post) and thus only biting on the the edge of the disc. Once replaced with the correct pads, the problem was solved and the noise immediately disappeared. So my advice to you is to check the pads are correctly matched for the caliper and if so, then try all the other suggestion if the noise persists. Greybeard 1 Link to comment Share on other sites More sharing options...
MORNE Posted October 15, 2019 Share I haven't read the replies here but had a similar issue with Shimano brakes recently on a new bike, believe it or not. After trying everything the interwebs suggested I came up with still screaming brakes. It turned out that the wrong model pads were placed in the calipers. They were slightly shorter that than the later specified pads (the later model pads had a slightly longer attachment post) and thus only biting on the the edge of the disc. Once replaced with the correct pads, the problem was solved and the noise immediately disappeared. So my advice to you is to check the pads are correctly matched for the caliper and if so, then try all the other suggestion if the noise persists.so no fire?.... Link to comment Share on other sites More sharing options...
Ed-Zulu Posted October 16, 2019 Share so no fire?....Oh there were lots of fire at one stage, but the final issue was as above DieselnDust 1 Link to comment Share on other sites More sharing options...
Sarge Posted October 18, 2019 Share Well gents, I'm no cleaver dick but I did the cleaning, burning etc etc without it helping. Then I bought a new set of disk pads and my smile is back. Squeal gone, thank goodness. Worth every cent!!!!! dasilvarsa, DieselnDust and ChrisF 3 Link to comment Share on other sites More sharing options...
DieselnDust Posted October 18, 2019 Share Hope you cleaned the disc rotors first. Whatever contaminant that was responsible for the squeal would also be on the rotor. Link to comment Share on other sites More sharing options...
solty Posted October 19, 2019 Share Happy squeal free miles Sarge.Do yourself a quick favour and check your caliper for little oil leaks, especially around the bleeding nipple. I suspect I've just ruined a set of pads after being a bit sloppy with tightening up after a brake bleed. Link to comment Share on other sites More sharing options...
arendoog Posted October 19, 2019 Share I haven't read the replies here but had a similar issue with Shimano brakes recently on a new bike, believe it or not. After trying everything the interwebs suggested I came up with still screaming brakes. It turned out that the wrong model pads were placed in the calipers. They were slightly shorter that than the later specified pads (the later model pads had a slightly longer attachment post) and thus only biting on the the edge of the disc. Once replaced with the correct pads, the problem was solved and the noise immediately disappeared. So my advice to you is to check the pads are correctly matched for the caliper and if so, then try all the other suggestion if the noise persists.Aaaahh! Sanity at last Edited October 19, 2019 by arendoog Link to comment Share on other sites More sharing options...
BaGearA Posted October 19, 2019 Share Happy squeal free miles Sarge.Do yourself a quick favour and check your caliper for little oil leaks, especially around the bleeding nipple.I suspect I've just ruined a set of pads after being a bit sloppy with tightening up after a brake bleed.bleed blocks... Link to comment Share on other sites More sharing options...
solty Posted October 19, 2019 Share bleed blocks...Nope, seeping oil from the bleed nipple over time. Link to comment Share on other sites More sharing options...
Straight Line Posted October 24, 2019 Share Disc pads which are contaminated with oil/grease/washing additives can cause squealing. Clean them with Bel Ray Brake & Contact cleaner which should be available at most off-road motor cycle shops. Some years ago I read an article on this problem in car disc pads where it was stated that the squealing is actually a harmonic caused by high speed vibration between the pad and the disc. One of the remedies was to apply a thin layer of heat resistant grease on the back of the pads (ie the metal base of the pad to which the pad is fixed). Not sure if this is relevant but maybe? This link to the problem is pretty comprehensive: https://www.liv-cycling.com/global/campaigns/how-to-fix-squeaky-disc-brakes/20209 Link to comment Share on other sites More sharing options...
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