Brand New Brackes = Deafeningly Loud Squealing Noise

[BlackR32]

Hi all,

I just baught some brand new slotted rotors for my gtr (i think rda, but dont really remember), put them on, with brand new pads (just oem replacements) and they make a really REALLY load squealing noise when I am braking, much worse at low speeds.. The anti squeak metal pads are in place any ideas?

thanks.

[Fry_33]

The first question most will ask is have you bedded in the pads properly yet?

Did you clean the anti squeak metal pads at all before reinstalling?

Is it just the fronts or the rears, or both?

[BlackR32]

I hate it when I have teh simple stuff pointed out to me when I didn't bother (

My mate actually did the brakes under my supervision while I was doing the engine... the pads prolly need a clean...

How do I bed the pads in properly?

Cheers.

[Fry_33]

This is from the EBC website for bedding in their brake pads (It will vary slightly between manufacturers)

Best procedure is to drive gently avoiding harsh braking unless in an emergency for first 100 miles. In the second 100 miles (up to 200) you can use gently increasing brake pressures when using the brakes.

Only after 200 miles urban driving (not 200 miles on a freeway where brakes are almost unused) should you attempt to apply heavy load and heat to the brakes. To do this final bedding on a QUIET ROAD in safe traffic apply the brakes and slow from 60 to 10 MPH five times in a row. Then drive slowly for a few minutes if safe to do so to allow the brakes to cool. Try to avoid coming to a rest whilst the brakes are heated.

A smell may be noticed from the warm brakes, this is normal. Repeat this procedure a second time after the brakes have TOTALLY cooled down. EBC pads get better with miles. Even after this bed in procedure it can take up to 1500 miles before the pads are at their best. In the meantime the pads will be good and safe but true potential not realised. EBC makes performance pads that last, they do not bed in within 5 minutes driving. Noises will be more likely during the first 1000-1500 miles use whilst this chemical bedding takes place.

From memory there is a thread in the suspension and braking section that goes through brakes squealing. Have a read of that as it may give you a few more ideas. There is an antisqueal paste you can get that goes on the back of the pads. between the pads rear metal backing and shims and then between the shims and the piston.

[260tech]

This is from the EBC website for bedding in their brake pads (It will vary slightly between manufacturers)

Best procedure is to drive gently avoiding harsh braking unless in an emergency for first 100 miles. In the second 100 miles (up to 200) you can use gently increasing brake pressures when using the brakes.

Only after 200 miles urban driving (not 200 miles on a freeway where brakes are almost unused) should you attempt to apply heavy load and heat to the brakes. To do this final bedding on a QUIET ROAD in safe traffic apply the brakes and slow from 60 to 10 MPH five times in a row. Then drive slowly for a few minutes if safe to do so to allow the brakes to cool. Try to avoid coming to a rest whilst the brakes are heated.

A smell may be noticed from the warm brakes, this is normal. Repeat this procedure a second time after the brakes have TOTALLY cooled down. EBC pads get better with miles. Even after this bed in procedure it can take up to 1500 miles before the pads are at their best. In the meantime the pads will be good and safe but true potential not realised. EBC makes performance pads that last, they do not bed in within 5 minutes driving. Noises will be more likely during the first 1000-1500 miles use whilst this chemical bedding takes place.

From memory there is a thread in the suspension and braking section that goes through brakes squealing. Have a read of that as it may give you a few more ideas. There is an antisqueal paste you can get that goes on the back of the pads. between the pads rear metal backing and shims and then between the shims and the piston.

Like the man says, "there is a paste" never do the job without it imo. Anti-squeal, anti-rattle, anti-chatter, nice red~orange~pink colour, top stuff, sticky, helps hold things together, dries to form a silicone sort of rubber compound, use sparingly on metal to metal contact points, piston to pad backplate, pad backplate to caliper, anti rattle shims. did I mention the stuff is a lovely red~orange~pink, CRC "Disc Brake Quiet" 4 oz squeeze bottle. Caution: May cause eye irritation. Gets on everything if over applicated.

Cheers GW