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Re: Calipers under heat? (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Dano on November 27, 2000 at 20:09:05:

In Reply to: Calipers under heat? posted by Gordon on November 27, 2000 at 04:45:29:


Love the thought of not seeing a bit of rust on the hubs... however... powder coating is put on for 20 minutes @ 395 degrees F. Is this going to do anything to the discs (warpage, etc?). They build up the heat (goes down to about 345 when the big door of the oven is opened... then they hold it for 20 minutes when it reaches 395. Rolled out and cooled in room temperture (about 70 degrees F).
I have no idea what temp the rotors reach under normal/hard braking?


I also wondered about the heat issue. Not sure what temps braking actually generates, but I know good brake fluids are rated for over 500 degrees (to cut down on boiling the fluid). I was more worried about melting the ruuber seals on the calipers, so I spung for the rebuid kits (didn't hurt to do them, anyway). I ended up baking with the old seals in place, as it was a lot eaiser than masking the bore (especially for sandblasting). Anyway, I figured that there was only oine way to find out. No warping yet.



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