Boxerworks.com

ME 109 wrote:

Manfred wrote:
Ya mean I can't apply that stuff to the discs and hope it gets to the back side of the pads????????????

No I mean ya can apply it to the back side of the pads and hope it doesn't get to the discs!!!!!!!!!

Thanks - sometimes I need very clear instructions.

I wonder if Moly60 would work?

Did anyone suggest chamfering the leading edge of the pads?

George Ryals wrote:Did anyone suggest chamfering the leading edge of the pads?

I don't think so George, but I'm keen to hear your theory.

Don't remember where I stumbled onto this possible solution to squealing brakes, but ihe idea is to put a 1/16" 45 deg. chamfer on the leading edge of the pads. The theory I think is that this helps prevent chattering of the pad against the disk.

George Ryals wrote:Don't remember where I stumbled onto this possible solution to squealing brakes, but ihe idea is to put a 1/16" 45 deg. chamfer on the leading edge of the pads. The theory I think is that this helps prevent chattering of the pad against the disk.

Sounds like the theory about diagonal slots in brake shoes.

dougie wrote:

George Ryals wrote:Don't remember where I stumbled onto this possible solution to squealing brakes, but ihe idea is to put a 1/16" 45 deg. chamfer on the leading edge of the pads. The theory I think is that this helps prevent chattering of the pad against the disk.

Sounds like the theory about diagonal slots in brake shoes.

Never knew if that was more about "chatter," or more about wet-weather braking. I think it has been argued that it is good for both.

I think slots in braking material and slots/holes in disks are put there to vent the gases coming off under HARD braking. Without venting, the gas pressures can grossly reduce braking efficiency. It's like wetting your finger and touching a hot object. For a very short while the steam from the water holds your skin off the much hotter object(your mom's iron).

I can likely provide everyone with very specific cause & affect as well as why and what to do about it, but for everyone's sake since we are talking about a specific disc caliper design on a BMW, if you can provide me with a VIN number (you can change around what - likely the last three to four; have no idea how large BMW's "job numbers" were...) so I can look it up in the ETK and give short and concise answers to the issues you are seeing, rather than a marathon rambling post. I can say fortunately there are answers and none of them come in cans or tubes... I'll be in and out; leave me a way to look at the design via the ETK and I'll get back with you.

For the record, grease on one's brakes will cause them to instantaneously lock; not what most would assume...

Here's the VIN of my bike: WB1046409H6491272