noisy brakes

[bufferman]

has anyone had really noisy brakes have ghia front disc w/drilled rotors and 944 rears drilled rotors 944 master  all 4 rotors have been turned and new pads not to bad if you hit them light  but if you have to get on them the have a outrages sqeak



thanks
steve

[Bruce]

Usually brake squeal is due to the pads vibrating and only happens under light braking.  One of the cures is to glue the pads to the pistons

If you hear a loud "wooshing" sound, that is the holes in the rotors.

[bufferman]

thanks bruce but the pads are glued still make noise

steve

[silas]

how old/new are the pads & turned rotors? do you notice any odd wear marks/hot spots on the pads or rotors? can you physically move the pad while it's seated in the caliper? were there any small metal shims that go between the caliper to pad mounting area?

you could try and chamfer the edges of the pads and see if that makes a difference. wear eye & breathing protection and go to your bench grinder and grind 45 degree angles on each edge of the pad (where the pad meets the rotor).

[Bruce]

Chamfers!  I forgot about those.
I put new pads in the rear of my car once and they squealed badly.  So I took them out and ground about a 5mm chamfer on the leading edge only.  Completely eliminated all the noise ever since.  The trick I heard was to only chamfer the leading edge.

[bufferman]

mmmmmm put a little edge there maybe need to go a little bigger will give that a try
thanks

[silas]

The trick I heard was to only chamfer the leading edge.

yup, definately do the leading edge. every time i've done it i do it to the leading, trailing & inner edges....the inner helps eliminate noise from a rotor with a big inner ridge, and i've done the trailing mostly just to cover my ass so i know that it would not be a factor and require taking the pads out again.