DBA 4000 Rotors issue ?
Thread Starter
Melting Slicks
Joined: Apr 2017
Posts: 2,296
Likes: 386
From: Jersey
DBA 4000 Rotors issue ?
So about a year ago i swapped out my stock rotors for a set of DBA 4000 rotors. So now when braking they are noisy, its hard to explain. Not a squeaky noise but like i can hear the pads hitting the rotors and feel it. Pads are fine and brand new. I even changed them out to see if it was a pad problem and its the same. Anyone else have this problem? Or am i in the corvette abius by myself ?
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Pad metal backing plate, to calipers metal surface itself.
Hence did you use Brake silicone grease on the back and sides of the pads metal back plate, before they where installed.
And if you are power washing the car a lot, may have to pull the pads to clean, and re-grease them every so often as well.
Simply, short of using a very aggressive racing pad that its pad surface to rotor surface itself can make the squealing noise, most of the time when you have break squeal, its the pad metal backer plate that is making the noise, from dry metal on dry metal, as the pad is vibrating in the caliper during braking.
Also, when you install the caliper to begin with, make sure to pull the sliding pins to make sure they are pulled, cleaned and greased as well.
Hence did you use Brake silicone grease on the back and sides of the pads metal back plate, before they where installed.
And if you are power washing the car a lot, may have to pull the pads to clean, and re-grease them every so often as well.
Simply, short of using a very aggressive racing pad that its pad surface to rotor surface itself can make the squealing noise, most of the time when you have break squeal, its the pad metal backer plate that is making the noise, from dry metal on dry metal, as the pad is vibrating in the caliper during braking.
Also, when you install the caliper to begin with, make sure to pull the sliding pins to make sure they are pulled, cleaned and greased as well.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,629
Photo of rotor surfaces, since pads may have melted to rotor surfaces, and that is causing the noise.
Also, photo of pads,since if leading and trailing edge not edge tapered/ chamfered, could be causing the noise as well.
Or could be that rotors and pads are glazed from not hard enough stops to break the glazing,and may have to de-glaze both by hand isntead.
As for Powerstop pads, I do not run them since they do offer a heat range charts for any of their pads, so don't have a clue on what pad is best for what.
Also, photo of pads,since if leading and trailing edge not edge tapered/ chamfered, could be causing the noise as well.
Or could be that rotors and pads are glazed from not hard enough stops to break the glazing,and may have to de-glaze both by hand isntead.
As for Powerstop pads, I do not run them since they do offer a heat range charts for any of their pads, so don't have a clue on what pad is best for what.
Thread Starter
Melting Slicks
Joined: Apr 2017
Posts: 2,296
Likes: 386
From: Jersey
Nothing is melted to the rotors, pads are tapered/ chamfered. Pads are not glazed just replaced them thinking the pad could be the problem. Used the same brand pads on my stock GM rotors with no problems. Which is another reason it makes me think its possibly the rotors. Also only happens in the rear, and its not a constant. Its not a metal to metal noise or a squealing noise. It feels like its metal to metal when it happens. Very weird.....
Le Mans Master
Joined: Oct 2000
Posts: 6,501
Likes: 717
From: Sausalito CA
If I understand this noise began 1 year after your rotor and pad swap.
You change the pads yet the noise remains, assuming you greased everything again.
I am with Dano on this, regrease.
Since this is a new noise that began after a year of wear, there are limited things to check.
Check rotor runout, deglaze the rotors, chamber/ smooth the pads, caliper pad pin replacement, inspect caliper pistons, look for wear marks/ damage on the calipers, double check the torque on all related bolts, and ensure the rotor is flat to the hub.
A brake fluid bleed or flush to ensure no line is clogged could also be recommended, and don't forget to use a Tech II, or like, to open the ABS valves.
Lastly, noises are sometimes hard to locate.
You may think it is brake related, may be suspension related and what you think originates in the front may actually originate from the rear.
All FWIW Good luck
You change the pads yet the noise remains, assuming you greased everything again.
I am with Dano on this, regrease.
Since this is a new noise that began after a year of wear, there are limited things to check.
Check rotor runout, deglaze the rotors, chamber/ smooth the pads, caliper pad pin replacement, inspect caliper pistons, look for wear marks/ damage on the calipers, double check the torque on all related bolts, and ensure the rotor is flat to the hub.
A brake fluid bleed or flush to ensure no line is clogged could also be recommended, and don't forget to use a Tech II, or like, to open the ABS valves.
Lastly, noises are sometimes hard to locate.
You may think it is brake related, may be suspension related and what you think originates in the front may actually originate from the rear.
All FWIW Good luck
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Thread Starter
Melting Slicks
Joined: Apr 2017
Posts: 2,296
Likes: 386
From: Jersey
If I understand this noise began 1 year after your rotor and pad swap.
You change the pads yet the noise remains, assuming you greased everything again.
I am with Dano on this, regrease.
Since this is a new noise that began after a year of wear, there are limited things to check.
Check rotor runout, deglaze the rotors, chamber/ smooth the pads, caliper pad pin replacement, inspect caliper pistons, look for wear marks/ damage on the calipers, double check the torque on all related bolts, and ensure the rotor is flat to the hub.
A brake fluid bleed or flush to ensure no line is clogged could also be recommended, and don't forget to use a Tech II, or like, to open the ABS valves.
Lastly, noises are sometimes hard to locate.
You may think it is brake related, may be suspension related and what you think originates in the front may actually originate from the rear.
All FWIW Good luck
You change the pads yet the noise remains, assuming you greased everything again.
I am with Dano on this, regrease.
Since this is a new noise that began after a year of wear, there are limited things to check.
Check rotor runout, deglaze the rotors, chamber/ smooth the pads, caliper pad pin replacement, inspect caliper pistons, look for wear marks/ damage on the calipers, double check the torque on all related bolts, and ensure the rotor is flat to the hub.
A brake fluid bleed or flush to ensure no line is clogged could also be recommended, and don't forget to use a Tech II, or like, to open the ABS valves.
Lastly, noises are sometimes hard to locate.
You may think it is brake related, may be suspension related and what you think originates in the front may actually originate from the rear.
All FWIW Good luck
Thread Starter
Melting Slicks
Joined: Apr 2017
Posts: 2,296
Likes: 386
From: Jersey
No I'm not an aggressive driver, i would say spirited at times. I didn't buy the car to ***** foot it around but I'm not hard on the brakes either. Car is not a daily at all and does not see any bad weather. 2006 with only 22,000 miles.