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      10-02-2015, 08:15 PM   #27
fe1rx
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Drives: 135i, 328i, Cayman S
Join Date: Jan 2008
Location: Canada

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Quote:
Originally Posted by Bullitt View Post
Also only used brake fluid to lube the seals and pistons during the rebuild. The supplied grease wasn't used.
Brake fluid is ok to lubricate the seal but doesn't do a good job lubricating the piston outboard of the seal, which is where galling between the piston and the caliper occurs. I use Permatex Ceramic Brake Lube in this area. This lube is compatible with brake fluid and it contains solid lubricant particles that won't get cooked or squeezed out like conventional brake greases will.

I regrease the front pistons annually along with a dust boot change so I can see how it is working. The "greasyness" gets cooked out of the lubricant, but the solids that are left behind still lubricate the piston.

That and a couple of other related hints are shown toward the end of this post:

http://www.1addicts.com/forums/showp...3&postcount=37
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