Front Brake Squeal
04-20-2017, 07:14 PM
#1
Racer
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Front Brake Squeal
Just replaced front brake pads and rebuildt the calipers. The brakes worked great to start with for a day or two. Then they started squealing. Pads have the liner in contact with the caliper pistons. Piston shoulder is oriented correctly. Even tried lube on the pad and piston contact. No help. Light braking no problem. Heavy parking at speed no problem. They squeal when I apply pressure coming to end of a stop. They are ok when cold for a block or two, then they start to squeal.
Any thoughts?
Any thoughts?
04-22-2017, 10:17 AM
#3
Racer
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Brake Squeal
The pads are Centric OE. They come with shims. I recently installed same on the rear without any issues. The braking was so much improved with the new rears that I ordered the same for the front. Not sure if I have them bedded in yet or how far one needs to drive and use them to bed in. There is a conflict between my factory manual and Dempsey's book on the angle of the cup shoulder. Factory says parallel to the spring plates(how I always do it) and the Dempsey book says set cups at 20 degrees. I set them parallel.
Manual also states to check clearance between spring plates and pads so you have .4 to .6 mm clearance. I have never been concerned with this clearance in the past. Thanks for your interest.
Manual also states to check clearance between spring plates and pads so you have .4 to .6 mm clearance. I have never been concerned with this clearance in the past. Thanks for your interest.
04-22-2017, 07:00 PM
#5
uninformed gas bag
(contemplating on whether gas bag is one or two words)
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(contemplating on whether gas bag is one or two words)
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It sounds like you are doing the right things but you still need to get some new pad material on your current rotors.
04-27-2017, 10:50 AM
#7
In my experience...if you did not replace the rotors or at least get them re-ground/turned you will get front brake squeal.
There is simply no way the new pads will evenly mate with the old worn rotors. This causes slight intermittent contact between the high points of the rotor with the surface of the pads, this causes vibration, which in turn equates to squeal.
If you do an aggressive pad bedding procedure, you may get the pad surface to wear in, so they mate with the irregular rotor surface, but the odds of success are poor.
On the track it doesn't matter, as one changes pads for different tracks and conditions, and some squeal is of no concern.
For the street however, it is down right aggravating to say the least!
Mark
There is simply no way the new pads will evenly mate with the old worn rotors. This causes slight intermittent contact between the high points of the rotor with the surface of the pads, this causes vibration, which in turn equates to squeal.
If you do an aggressive pad bedding procedure, you may get the pad surface to wear in, so they mate with the irregular rotor surface, but the odds of success are poor.
On the track it doesn't matter, as one changes pads for different tracks and conditions, and some squeal is of no concern.
For the street however, it is down right aggravating to say the least!
Mark