Grinding squeal when braking, pads/rotors fine?
06-18-2013, 11:51 AM
#1
Grinding squeal when braking, pads/rotors fine?
I have an intermittent problem when braking I'm hoping to solve. Once in a while I get a squeal when I brake and what feels like a grinding. I can't really tell exactly where it's coming from but it sort of feels like its coming from the front of the car. I went through each wheel carefully and checked all the pads and rotors and everything looks to be fine. No scoring in the rotors, plenty of pad left all the way around so I'm at a loss for what it could be?
The noise.grinding is not always there, but more often than not it is. I'm 99% sure it has something to do with the brakes because it only happens when I brake and it is more pronounced when I brake normally but dies down the harder I brake.
Any thoughts on where to start looking would be a big help...thanks!
The noise.grinding is not always there, but more often than not it is. I'm 99% sure it has something to do with the brakes because it only happens when I brake and it is more pronounced when I brake normally but dies down the harder I brake.
Any thoughts on where to start looking would be a big help...thanks!
06-18-2013, 06:06 PM
#2
Rennlist Member
Hmm...
I believe the stock pad set-up had little sticky vibration dampers installed between the pads / pistons. I've not seen them in a long time, having dispensed with them for track use. The design idea is partly to keep the pads from "shuddering" or "squealing". See the cartoon in the thread link below. These may be missing (common as time and service piles up).
I'd start there. One would also want to check the condition of the front wheel bearings. All the above assumes the rotors are installed / seated, brake calipers firmly mounted, etc.
Hope this helps.
https://rennlist.com/forums/attachme...plates-tmp.jpg
I believe the stock pad set-up had little sticky vibration dampers installed between the pads / pistons. I've not seen them in a long time, having dispensed with them for track use. The design idea is partly to keep the pads from "shuddering" or "squealing". See the cartoon in the thread link below. These may be missing (common as time and service piles up).
I'd start there. One would also want to check the condition of the front wheel bearings. All the above assumes the rotors are installed / seated, brake calipers firmly mounted, etc.
Hope this helps.
https://rennlist.com/forums/attachme...plates-tmp.jpg
06-18-2013, 08:45 PM
#3
Team Owner
Join Date: Oct 2009
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what he said.
my front 928GTS pagid blue (very hard) pads have been screeching for going on 4 years and 80+ k miles.
they screech the most under soft braking. hard braking, they sound normal.
I figure they got to be eating my discs at somewhere closer to the rate as the pad wear than soft pads.
so i'm gonna switch em out for those cheap softer pads from O'Reilly. hopefully get maybe 50 k miles more out of the discs that way.
my front 928GTS pagid blue (very hard) pads have been screeching for going on 4 years and 80+ k miles.
they screech the most under soft braking. hard braking, they sound normal.
I figure they got to be eating my discs at somewhere closer to the rate as the pad wear than soft pads.
so i'm gonna switch em out for those cheap softer pads from O'Reilly. hopefully get maybe 50 k miles more out of the discs that way.
06-18-2013, 09:15 PM
#5
Burning Brakes
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It would also help to know more info about the issue such as:
When did it start? Were there any changes or significant events before it started? When were the brakes changed last? What kind of pads are you using? Did you pull the wheels off and check the wear on the inside pads?
When did it start? Were there any changes or significant events before it started? When were the brakes changed last? What kind of pads are you using? Did you pull the wheels off and check the wear on the inside pads?
