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post #15 of (permalink) Old 1st October 2014
Technical Supremo

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Re: Brake caliper painting

Yes brake fluid will boil if it gets hot enough.

Primarily brakes convert kinetic energy into heat so the more efficently the brakes can disipate that heat the more efficient they will be. If the brakes get too hot they will fade long before the brake fluid boils Brake fade is essentially when the brakes abilty to disipate heat reduces dramatically.

The heat disapation of a paint is much lower than that of a metal. The temperature (not heat) resistance of a paint is only a guide as to when it is likely to fail or begin to deteriorate. In fact the higher the temperature the lower it's ability to dispate heat.

I over 50 years of working at cars I have never seen the main body of a caliper fail due to corrosion. The main of cause of needing to replace calipers is due to internal seizing and corrosion of the pistons and their cylinders, areas which no paint can reach.
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