brake caliper, pad lubricant

[bluecoupe30!]

Where on the caliper or pin or pad do you apply your choice of brake lubricant? Where should there NOT be any lube or film? I have seen a build up of lubricant on the backside of pads, that turned hard and touched the exposed piston rubber parts. Looks like this would hasten their demise. Mike

 

[Honolulu]

During a caliper rebuild I put smidgen (technical term) on the piston itself, and some under the rubber seal/around the edge of the piston.

There's a different compound for the back of the pad backing plate, supposedly to keep disc brakes from squealing. I had heard the way to stop squealing is to chamfer the leading edge of the pad friction material. Some pads come with such a chamfer, many don't. This application is not for lubrication I don't thingk.

 

[deQuincey]

all info is here,


https://e9coupe.com/forum/threads/front-axle-brakes-bearings-wheel-hub-and-rear-brakes-too.28894/

bremzylinderpaste for pistons,

copper grease for pads

 

[bluecoupe30!]

all info is here,


https://e9coupe.com/forum/threads/front-axle-brakes-bearings-wheel-hub-and-rear-brakes-too.28894/

bremzylinderpaste for pistons,
View attachment 61212
View attachment 61213
copper grease for pads

View attachment 61214

View attachment 61215

Most excellent, thank you DeQ

 

[stphers]

Think about this, where does the pad slide? Not only do I use hi temp copper paste on the pad backside, I also put a little on each edge of the pad as well as on the metal hold down clip ( the anti rattle clip that holds tension on the pads ) these are all places that the pad slides against. Just a little, don't get any on the pad surface. Rarely run into brake pad squeal ( this is after replacing probably over a thousand brake pads in my time ) Is this what you were asking about, not how to use lube when putting calipers together ( that is a different answer ) The copper paste does not harm the piston boots

 

[bluecoupe30!]

Think about this, where does the pad slide? Not only do I use hi temp copper paste on the pad backside, I also put a little on each edge of the pad as well as on the metal hold down clip ( the anti rattle clip that holds tension on the pads ) these are all places that the pad slides against. Just a little, don't get any on the pad surface. Rarely run into brake pad squeal ( this is after replacing probably over a thousand brake pads in my time ) Is this what you were asking about, not how to use lube when putting calipers together ( that is a different answer ) The copper paste does not harm the piston boots

That is helpful Rick. Yes, I was wondering about the edges too. I took my pads out yesterday and found the lube on the backside had turned to a hard paste. So I looked at when I did these last and it was 2008! Time flies