[stvding]

My f32 m sport blue calliper brake is squealing like hell during low speed braking

Took it yesterday to dealer, they said nothing wrong, suggested a 180 dollar brake service. Wtf! If nothing wrong why service? (Brake not covered in canada)
Took it to a ind shop today, they suggested machining the rotor. The rotor is not smooth.
Should I do it?
-----------1-
Update 2016/11/20
Lube the front. Not really work.
I do feel uneven and bit rough on the front rotor.
Should i machine it? Can it be re surfaced? I compare it to the x1 next to me. His feels smooth compare to mine

[crono06]

I believe they're correct in saying that this is normal. Don't think anything can really be done. Maybe change out your pads/rotors if you're unhappy with them. Then again, your indy might be right. Up until this year, I had absolutely no brake squealing issues.

[Polo08816]

Originally Posted by stvding

My f32 m sport blue calliper brake is squealing like hell during low speed braking

Took it yesterday to dealer, they said nothing wrong, suggested a 180 dollar brake service. Wtf! If nothing wrong why service? (Brake not covered in canada)
Took it to a ind shop today, they suggested machining the rotor. The rotor is not smooth.
Should I do it?

I have the M Sport Brake Option, but I'm using OE M3 brake pads on my car so it should be noisier than yours.

You just need to clean and re-apply some Permatex:

https://www.permatex.com/products/lu...s-lubricant-2/

[stvding]

Originally Posted by Polo08816

I have the M Sport Brake Option, but I'm using OE M3 brake pads on my car so it should be noisier than yours.

You just need to clean and re-apply some Permatex:

https://www.permatex.com/products/lu...s-lubricant-2/

Apply to which part of the brake system?

[F32Fleet]

RU sure it's the rotors and not the back of the pads? IMO I would have the shops take off the pads, clean the backing them with brake cleaner and use an appropriate anti-squeal compound. I've read that the factory applied material is insufficient.

[stvding]

Originally Posted by F32Fleet

RU sure it's the rotors and not the back of the pads? IMO I would have the shops take off the pads, clean the backing them with brake cleaner and use an appropriate anti-squeal compound. I've read that the factory applied material is insufficient.

will do

[Polo08816]

Originally Posted by stvding

Apply to which part of the brake system?

See attached PDF from ISTAD Rheingold documentation. It illustrates where exactly brake lubricant needs to be applied with the appropriate diagrams.

[stvding]

Originally Posted by Polo08816

See attached PDF from ISTAD Rheingold documentation. It illustrates where exactly brake lubricant needs to be applied with the appropriate diagrams.

I had the front done but still squeaking, just a bit better. Do rear too?

[Polo08816]

Originally Posted by stvding

I had the front done but still squeaking, just a bit better. Do rear too?

Probably.

Whether it was done correctly is another matter as well.

[stvding]

Originally Posted by Polo08816

Probably.

Whether it was done correctly is another matter as well.

Can in change to non m sport brake pad on my m brake? Will this eliminate the noise?

[Polo08816]

Originally Posted by stvding

Can in change to non m sport brake pad on my m brake? Will this eliminate the noise?

The rear might have a fitment issue.

The real problem is improper installation. I've run M Sport Brake Option pads as well as M3 pads and have zero noise issues. I let the brake lubricant cure/dry for about an hour or two before putting the pads back into the calipers. Are you sure your installer is doing that as well?

[stvding]

Originally Posted by Polo08816

The rear might have a fitment issue.

The real problem is improper installation. I've run M Sport Brake Option pads as well as M3 pads and have zero noise issues. I let the brake lubricant cure/dry for about an hour or two before putting the pads back into the calipers. Are you sure your installer is doing that as well?

Definitely not. They called me to pick up after 1hr .

[Polo08816]

Originally Posted by stvding

Definitely not. They called me to pick up after 1hr .

I believe that's the source of the problem.

When the lubricant isn't given enough time to dry/cure, brake pressure from the caliper will squeeze and thin out the layer that makes contact between the pad and brake caliper.

[stvding]

Originally Posted by Polo08816

I believe that's the source of the problem.

When the lubricant isn't given enough time to dry/cure, brake pressure from the caliper will squeeze and thin out the layer that makes contact between the pad and brake caliper.

Can the rotor be machined??

[kenwelch]

Yes if the final machined thickness is not smaller than the minimum thickness specification stamped on the rotor.

[stvding]

Originally Posted by kenwelch

Yes if the final machined thickness is not smaller than the minimum thickness specification stamped on the rotor.

Or maybe the stock pad is just squeal like that because "performance" focus. (Come on, my friends's m4 without ceramic brake don't squeal, my435 more performance than m4? No way).

Maybe i should change to a less aggressive pad? Oem or aftermarket? Any suggestions?

[stvding]

Had a friend drove it in parking lot. Found out the squeak is actually from the rear!!!! Will go have the rear lubed Wednesday. Should be good after this!!!!!

[stvding]

Bought a set of rear textar pads for my f32 with blue m brake. Applied prematex disc brake quiet and clean up rotors. No noise afterwards! Hope it doesn't come back

http://f30.bimmerpost.com/forums/sho....php?t=1336007