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Ok, I hope that I can explain this so everybody understands my problem. I replaced my brake pads with CaroTeck ceramic pads about 500 miles ago. Love the pads and very little brake dust. They stop and handle well in all driving modes. However, when the car is moving at idle speed and the brakes are applied gently to stop, the breaks seem to grab slightly and make a “screech” noise on all four wheels. It happens only when going at idle and makes the noise even when the brakes are released.
I am at a loss to know what could be causing this to happen. The breaks are completely silent in all other driving modes and speeds. Anyone out there have any ideas? Oh, I forgot, 2014 Z51.
If you did the replacement yourself....did you notice on the OEM pads there was a rubber backing.....You should remove that and apply it to the back of your replacement ceramic pad....If not enough glue comes of with the pad apply heat resistant contact cement to hold it to the ceramic pad....that will solve your brake noise problem.
If you did the replacement yourself....did you notice on the OEM pads there was a rubber backing.....You should remove that and apply it to the back of your replacement ceramic pad....If not enough glue comes of with the pad apply heat resistant contact cement to hold it to the ceramic pad....that will solve your brake noise problem.
When I removed the OEM pads I removed the two sided tape. The tape was not reusable. I applied break pad lubricant to the new pads before I installed them. I did the same on my 2008 Vet with no problems. I sold the OEM pads so I can't tell if they had a rubber backing. If they did, can I get the rubber material anywhere?
When I removed the OEM pads I removed the two sided tape. The tape was not reusable. I applied break pad lubricant to the new pads before I installed them. I did the same on my 2008 Vet with no problems. I sold the OEM pads so I can't tell if they had a rubber backing. If they did, can I get the rubber material anywhere?
I did the same with Carbotech 1521 Ceramic pads that had tape on the front pads. did not, would not replace it, what a PIA! Just used Permatex lub on the pad backs that is designed to stop vibration. However I also bedded the pads when I installed them. 5 or 6 hard stops from 60 to 20 mph followed by driving without using the brakes for ~10 minutes, then when I did park put it in gear and did not apply the parking brake. Worked fine no noise.
With my OEM pads at about 1000 miles had loud squeal on some very slow stops. Bedded those the same way. Had to do twice and never another sound (just lots of brake dust) so switched to the Carbotech pads. Have not had any noise for the 8 months since I installed. I'd try bedding and see if that helps.
Lubed the back of the pads with Permatex. Rear pads had no shims and I just used the Permatex, no noise.
I did the same with Carbotech 1521 Ceramic pads that had tape on the front pads. did not, would not replace it, what a PIA! Just used Permatex lub on the pad backs that is designed to stop vibration. However I also bedded the pads when I installed them. 5 or 6 hard stops from 60 to 20 mph followed by driving without using the brakes for ~10 minutes, then when I did park put it in gear and did not apply the parking brake. Worked fine no noise.
With my OEM pads at about 1000 miles had loud squeal on some very slow stops. Bedded those the same way. Had to do twice and never another sound (just lots of brake dust) so switched to the Carbotech pads. Have not had any noise for the 8 months since I installed. I'd try bedding and see if that helps.
Lubed the back of the pads with Permatex. Rear pads had no shims and I just used the Permatex, no noise.
I used the same stuff on my new pads. I also bedded them in in somewhat the same way. I'm at a loss.
I used the same stuff on my new pads. I also bedded them in in somewhat the same way. I'm at a loss.
With my OEM pads, after I bedded them the squeal came back in a month. Used the bedding procedure again and it never came back. There was a recent post that referenced a good article about bedding. It said even after bedding you must use the brakes hard from time to time or the transferred pad material created could get spotty. It said some folks complain about warped rotors and the dealer surfaces them but it was only spotty build-up. That gives a new surface but you must bed them to put pad material on the rotors and use them hard periodically or it will just come back. Might try a repeat. FWIW.
I do use my brakes hard periodically, mostly for fun coming into a turn.
I'll try re-bedding them. But I have a question, when I installed the new pads I didn't have the GM Lube 19303310 so I used the Permatex on the sides instead. Would that substitution make the brakes make this noise?
I'll try re-bedding them. But I have a question, when I installed the new pads I didn't have the GM Lube 19303310 so I used the Permatex on the sides instead. Would that substitution make the brakes make this noise?
I bought the GM lub because that's all they say to use and only say it's needed on the sides. It is much less viscous than the Permatex. However I didn't buy enough, did not realize it came in such a small package. Only had enough for the front pads. However had some old brake pad lub from my street rod that looked exactly the same in consistency and color so used it for the rear, thought the Permatex, which really should work, was too viscous but had I not had that thinner matching lub would have used it.
If a second bedding doesn't do it, believe I'd get the GM lub (inexpensive on Internet but get 4 packages) and clean out the calipers with soap and water, alcohol etc. Then put the lub on the sides. Easy now that you got past the tape and it's your 2nd time! Perhaps the cleaning, perhaps the lub but one or the other hopefully works.
I bought the GM lub because that's all they say to use and only say it's needed on the sides. It is much less viscous than the Permatex. However I didn't buy enough, did not realize it came in such a small package. Only had enough for the front pads. However had some old brake pad lub from my street rod that looked exactly the same in consistency and color so used it for the rear, thought the Permatex, which really should work, was too viscous but had I not had that thinner matching lub would have used it.
If a second bedding doesn't do it, believe I'd get the GM lub (inexpensive on Internet but get 4 packages) and clean out the calipers with soap and water, alcohol etc. Then put the lub on the sides. Easy now that you got past the tape and it's your 2nd time! Perhaps the cleaning, perhaps the lub but one or the other hopefully works.
Thanks Jerry. I'll go the the Chevy dealer here in town on Tuesday and get or order some of the GM lube. It's supposed to cool down next week and might be the time to spend some time in the Garage. Do you think I should sand down the rotors and pads prior to reinstall?
Thanks Jerry. I'll go the the Chevy dealer here in town on Tuesday and get or order some of the GM lube. It's supposed to cool down next week and might be the time to spend some time in the Garage. Do you think I should sand down the rotors and pads prior to reinstall?
I did, it doesn't take much time. I used sanding sponges, 60 grit. I spent about 5 minutes on each rotor so was only getting off some old pad material. Could see it on the sanding pad but not really on the rotor. I read it was best to go perpendicular to the axle, so that is what i did. Don't recall the reason given. Perhaps it took off more old pad material. Doesn't add much time to the job, so why not!
I did, it doesn't take much time. I used sanding sponges, 60 grit. I spent about 5 minutes on each rotor so was only getting off some old pad material. Could see it on the sanding pad but not really on the rotor. I read it was best to go perpendicular to the axle, so that is what i did. Don't recall the reason given. Perhaps it took off more old pad material. Doesn't add much time to the job, so why not!
Well isn't this a pickle. None of the local GM dealerships use the recommended GM Brake Lubricant #19303310. They say that they can order it but it takes about 4 days, not a problem but I had kind of wanted to do this work tomorrow. I asked them, if you're not using the recommended GM lube. what are you using? They said "the stuff from O'Reilly's". I guess I'll just have to wait and do the brake job latter.
Brake noise
