Extremely Squeaky Brakes

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Sep 10, 2024 | 11:35 AM

socal400

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Extremely Squeaky Brakes

As of a couple weeks ago, I have noticed a horrendous squealing sound whenever my brakes are cold. It's miserably loud and has mild potential for safety concerns. I upgraded to the LS BBK a while back and some P2M lowers that have a tendency to press the brake shield into the rotor sometimes (especially at full lock) so is it possible that it has dug a little trench in the rotor to the point that whenever I compress the brakes it releases gas/noise through the little line? I'm somewhat at a loss and both my SO and I have grown rather tired of the obnoxious high-pitched scream whenever I move around the parking garage lol. Another question, I recently swapped my PS rack (old one had terrible leaks, dumped about a cup of fluid from one of the dust cover) and upon the first test drive, the front tires shake(?)/the front assembly hops up and down when turning the wheel at a stop. Could that be an alignment problem? I recently upgraded to a lower-profile tire and lowered about an inch and a half (both after the ps rack swap and the hopping problem) so I'll need to get aligned anyway.

Oct 22, 2024 | 03:29 PM

socal400

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Bumping this as I've torn apart my brakes probably 4-5 times on the floor of my parking garage in the past few days. I've brake cleaned everything, replaced with new OEM pads from Lexus, re-lubed everything and checked & rechecked everything and the best I've gotten is about 20 minutes of squeal free driving. My next steps are resurfacing the rotors or buying new ones unless anyone else has input on this problem. The squeal is LOUD, like deafeningly loud. So any advice would be appreciated as it's both incredibly annoying and frustrating

Oct 22, 2024 | 05:10 PM

Tallyhoe

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Probably hit it with some sandpaper and rough them up a little. In my 07 Tundra, new brakes howl when it's cold, saw some video that they took the pads and cut off a steeper angle and it solved the issue. I'm not that brave, I just deal with it in the winter time.

Oct 22, 2024 | 05:39 PM

Oro

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Not clear, but have you pulled the caliper floating pins to examine, clean, and lube them?

Oct 25, 2024 | 08:40 PM

SexCoupe

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yes grease pins and grease the metal part on the caliper that the pads slide against. remove the pads and look to see if they are flat. what brand/ kind if pads do you have?

Nov 14, 2024 | 02:31 PM

socal400

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Yes, pulled everything and relubed. Will probably do it again just because at this point

Nov 14, 2024 | 02:32 PM

socal400

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Quote:

Originally Posted by SexCoupe

yes grease pins and grease the metal part on the caliper that the pads slide against. remove the pads and look to see if they are flat. what brand/ kind if pads do you have?

I'm running Bosch rotors and OEM Lexus pads currently, got them resurfaced and it seemed to help for like a day. Now they are fine when cold, but miserably loud when they warm up.