[SEL] RE: Re: OT OT - question about heating master cylinder casting

[Andy Glines]

>OT OT OT OT OT OT OT OT
>CAR RELATED
>
>What will heating a master cylinder casting to 450 degrees do to it?
>Anything bad?
>
>I've decided to powdercoat the master cylinder when I get my project car
>back from the painter dude. It's supposed to be semi-gloss black, as is
>the lid. We all know what brake fluid does to paint..........
>
>To powdercoat, the cleaned casting needs to be preheated to 450 to bake
>off impurities and such, then you cool it and coat it with the powder,
>then put it in the oven at 450 until the powder melts then let it bake
>at
>400 for 20 minutes.
>I'll strip all the guts out of it, the residual check valve for the rear
>brakes, the pistons/cups and such, but was wondering if baking a master
>cylinder casting at 450 degrees will do any harm to the thing??
>
>My son and I have repainted most of the emblems, replacement parts have
>been ordered. Many items have already been painted or powdercoated (got
>some krinkle black to try on my Maytag twin!) the glass is all out and
>cleaned up and patch panels welded into place and finished off.

Is your master cylinder cast iron?  If it is 450 may not be hot enough.  You 
will need to bake out/burn off oil in the casting in order for your powder 
to stick.  Even if it is new it will be oily.  Protect the openings and the 
bore when you put the coating on.