Brake Squeal
Racer
Joined: Jan 2021
Posts: 431
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From: Plano, Texas
I really think this is a wide problem across other GM brands. My Cadillac had the same problem and I was told to bed the brakes and it would only stop if for a short while. Eventually I resurfaced the discs to remove a glaze and then put new ceramic pads and and it went away.
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Same with mine. Intermittent at very low speeds but it's loud and annoying when it does it. I've bedded the brakes several times but it comes back. None of my previous modern Vettes, including Z06's, ever did this.
Thread Starter
4th Gear
Joined: Jan 2021
Posts: 4
Likes: 5
Warranty ? Repair
Has anyone experiencing brake squeal on their C8 taken it to the dealer for service repair? If so, was it successful? Did they identify a cause? Was it warranty? Normally brake pads are not warranty but I believe this is a different issue than normal wear. Mine have just over 2k miles on them.
Supporting Vendor
Joined: Oct 2009
Posts: 1,835
Likes: 509
From: Charlotte NC
Brake squeal is commonly related to the pads not being bed-in on the discs properly. Nine times out of ten when customers call us with this issue, it goes away for a period of time after a good bed-in. After bedding the pads and discs, the pad transfer layer on the disc will gradually scrape off, particularly if you're frequently driving the car with cold brakes. Please check out our video on the topic below:
Supporting Vendor
Joined: Jul 2007
Posts: 30,982
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From: Raleigh NC
Has anyone experiencing brake squeal on their C8 taken it to the dealer for service repair? If so, was it successful? Did they identify a cause? Was it warranty? Normally brake pads are not warranty but I believe this is a different issue than normal wear. Mine have just over 2k miles on them.
You can replace them, grease them, bed them, flip them, shim them, turn them, cryo them, oh yeah and even spray stuff on them. It may or may not help.
They don't always squeal, some squeal louder than others, and everything in between.
But the answer is the Z51 compound is an aggressive pad made by Pagid in a Brembo caliper and that makes it have a high likliehood to squeal as compared to other car.
There are aftermarket pads that absolutely reduce the dust and seem to be less disposed to noise.
-Ken
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Cruising
Joined: Sep 2020
Posts: 11
Likes: 0
The Z51 brakes squeal because they are performance brakes and that is what they do. It's possible but unlikely that you have a defective pad, rotor or caliper.
You can replace them, grease them, bed them, flip them, shim them, turn them, cryo them, oh yeah and even spray stuff on them. It may or may not help.
They don't always squeal, some squeal louder than others, and everything in between.
But the answer is the Z51 compound is an aggressive pad made by Pagid in a Brembo caliper and that makes it have a high likliehood to squeal as compared to other car.
There are aftermarket pads that absolutely reduce the dust and seem to be less disposed to noise.
-Ken
You can replace them, grease them, bed them, flip them, shim them, turn them, cryo them, oh yeah and even spray stuff on them. It may or may not help.
They don't always squeal, some squeal louder than others, and everything in between.
But the answer is the Z51 compound is an aggressive pad made by Pagid in a Brembo caliper and that makes it have a high likliehood to squeal as compared to other car.
There are aftermarket pads that absolutely reduce the dust and seem to be less disposed to noise.
-Ken
Last edited by Mlmeuret; Aug 21, 2021 at 01:58 AM.
Supporting Vendor
Joined: Oct 2002
Posts: 50,281
Likes: 518
From: Cleveland OH
St. Jude Donor '11,'13
If you are not tracking the car you can change your brake pads to a quality aftermarket pad such as the Carbotech 1521 compound quiet and low dust.
For a high quality low dust performance street brake pad take a look at the Carbotech 1521 brake pad 100% non-corrosive dust will not harm your wheels, paint or rotors. Carbotech brake pads are 100% made in the USA and contain NRS Technology Here is a link to explain further what NRS technology is exactly: http://www.nrsbrakes.com
Carbotech brake pads can be ordered by calling me at 216-780-8825 Or order direct Here
Chevrolet Brake Pads – Amp'd Autosport (ampdautosport.com) Use promo code z28 at check out for your forum discount.
Part numbers for C8 Z51 are below.
Front part Number CT28951F 1521 $284 Less 5%
Rear Part Number CT28951R 1521 $214 Less 5%
ALL COMPOUNDS ARE IN STOCK!
Carbotech brake pads are 100% Made in the USA!
:
:
The Carbotech Bobcat 1521™ is our high performance street compound that is our most successful compound. The Bobcat compound is known for its awesome release and modulation, along with unmatched rotor friendliness. Like our AX™ & XP™ line of compounds, Bobcat 1521™ is a Ceramic based friction material offering minimal rotor damage and non-corrosive dust. Bobcat 1521™ offers outstanding performance, even when cold, low dusting and low noise with an excellent initial bite. This compound’s virtually perfect linear torque production provides incredible braking force without ABS intervention. Bobcat 1521™ operating range starts out at ambient and goes up to 900°F. Bobcat 1521™ is suitable for ALL street cars, perfect for your tow vehicle, police cruiser. The Bobcat 1521™ compound has been found to last two-three times longer than OE pads you can purchase at a dealership or national retailer. That’s one of the beauties of Carbotech Ceramic brake compounds. Bobcat 1521™ is NOT recommended for any track use.
__________________
Adam Adelstein
Amp’D Autosport.com
Internet's largest retailer of Carbotech Performance Brake Pads.
PH:216-780-8825.
Email: sales@ampdautosport.com
Web Site & Direct ordering http://ampdautosport.com/
All major CC and Pay Pal accepted.
Check out Promo code:z28
For a high quality low dust performance street brake pad take a look at the Carbotech 1521 brake pad 100% non-corrosive dust will not harm your wheels, paint or rotors. Carbotech brake pads are 100% made in the USA and contain NRS Technology Here is a link to explain further what NRS technology is exactly: http://www.nrsbrakes.com
Carbotech brake pads can be ordered by calling me at 216-780-8825 Or order direct Here
Chevrolet Brake Pads – Amp'd Autosport (ampdautosport.com) Use promo code z28 at check out for your forum discount.
Part numbers for C8 Z51 are below.
Front part Number CT28951F 1521 $284 Less 5%
Rear Part Number CT28951R 1521 $214 Less 5%
ALL COMPOUNDS ARE IN STOCK!
Carbotech brake pads are 100% Made in the USA!
:
:
The Carbotech Bobcat 1521™ is our high performance street compound that is our most successful compound. The Bobcat compound is known for its awesome release and modulation, along with unmatched rotor friendliness. Like our AX™ & XP™ line of compounds, Bobcat 1521™ is a Ceramic based friction material offering minimal rotor damage and non-corrosive dust. Bobcat 1521™ offers outstanding performance, even when cold, low dusting and low noise with an excellent initial bite. This compound’s virtually perfect linear torque production provides incredible braking force without ABS intervention. Bobcat 1521™ operating range starts out at ambient and goes up to 900°F. Bobcat 1521™ is suitable for ALL street cars, perfect for your tow vehicle, police cruiser. The Bobcat 1521™ compound has been found to last two-three times longer than OE pads you can purchase at a dealership or national retailer. That’s one of the beauties of Carbotech Ceramic brake compounds. Bobcat 1521™ is NOT recommended for any track use.
__________________
Adam Adelstein
Amp’D Autosport.com
Internet's largest retailer of Carbotech Performance Brake Pads.
PH:216-780-8825.
Email: sales@ampdautosport.com
Web Site & Direct ordering http://ampdautosport.com/
All major CC and Pay Pal accepted.
Check out Promo code:z28
1st Gear
Joined: Oct 2021
Posts: 1
Likes: 0
Yup, mine started doing it at around 2400 miles, seeming out of nowhere. Only intermittently, and only at very low speeds. I even took it into my local chevy dealer to have it checked out but they said the brakes look fine. If someone figures out the best course of action let me know because it's annoying.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,914
Likes: 12,328
From: NE South Carolina
Essentially need to brake 6 or 7 times from 60 mph to 15 mph, let the brakes cool a few minutes between stops and after the 6th time let them cool without braking. Key is finding a place to do it. The Manual says need to do 20 to 25 times but 6 or 7 will do. If it's a Z51 need to apply the brakes aggressively periodically to maintain a thin uniform layer on the pads.
BTW, switched to Carbotech 1521 low dust pads on my 2014 C7 Z51, used them on my 2017 Grand Sport and have them now on my C8 Z51, never one squeal. BUT I use the brakes aggressively at least once or trice each time I drive.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,914
Likes: 12,328
From: NE South Carolina
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,914
Likes: 12,328
From: NE South Carolina
^^^
Yep, if it's like the C7 this issue is still vibration, probably caused by uneven brake pad residual on the rotors. Dealer cannot "bed the brake pads" for you and if they did GM would not reimburse. GM will pay the dealer to pull the pads and put brake pad lub on the sides of the steel pad backs. That's what you do when installing new pads and it will help for a while. Many found it comes back.
Bedding the pads will eliminate the cause (in most cases.) Google, lots written on the subject.
Yep, if it's like the C7 this issue is still vibration, probably caused by uneven brake pad residual on the rotors. Dealer cannot "bed the brake pads" for you and if they did GM would not reimburse. GM will pay the dealer to pull the pads and put brake pad lub on the sides of the steel pad backs. That's what you do when installing new pads and it will help for a while. Many found it comes back.
Bedding the pads will eliminate the cause (in most cases.) Google, lots written on the subject.
1st Gear
Joined: Feb 2022
Posts: 1
Likes: 0