New brakes screeching

[eggsarascal]

I’ve done the discs and pads on my work van today and they are screaming every time I touch the brakes, I’ve had the wheels off again and everything is how it should be. Anyone got any idea why?

[sandspider]

Just bedding in? Might stop after a mile or two?

[eggsarascal]

1 minute ago, sandspider said:

Just bedding in? Might stop after a mile or two?

That was my first thought, but I’ve driven it for 10-15 miles.

[Bob The Dog]

Copper grease on the backing plate? I fitted brembo brakes to my L200 and they squeal at slow speed. Brother in law also fitted Brembo to his Mini and they squeal too. 

Edited September 19, 2024 by Bob The Dog

[Mesterh]

3 hours ago, Bob The Dog said:

Copper grease on the backing plate?

That and on the slide. The part where the sliding caliper meets the fixed section. 

[Stubby]

Yep Copper slip Egger .

[Doug Tait]

Another possibility is a caliper not quite as free as it could be and isn't returning enough to fully release 

[Bob The Dog]

6 minutes ago, Doug Tait said:

Another possibility is a caliper not quite as free as it could be and isn't returning enough to fully release 

That’s a good suggestion. Sticking sliders will cause a squeal, but those should’ve been noticeable when changing the pads? Interestingly, Brembo advise against copper grease on the backing plates and suggest squealing could be down to misalignment of the pads. Copper grease needs to be kept away from rubber seals and slide boots and it can cause them to deteriorate.  

[eggsarascal]

I greased up, and the sliders are free. I’ve done enough discs and pads over years, that’s why I’m at a loss with this. It’ll have to stay as it is for now I’ve got a busy few days ahead moving our kids stuff from his old place to our new place. 

[Stool master]

Have you tried copper slip on both sides of the pads........