Vehicle & Technical > Discovery

Powder coated brake calipers?

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lee celtic:
Hi All

powerd coat cures at between 180 and 220 degrees so if the caliper gets hotter than that the paint will soften . :cry: (we had  a powder coat plant at work until last year )

but smoothrite is a glass compound suspended in solvent and will get harder the hotter it gets until it eventually burns off . however it does stay on for a very long time I have used it on loads of bike engines and calipers over the years and it works fine.

Les Henson:
Make sure that any machined surfaces don't get paint or powder coat on. You could be asking for a leak at a later date. I stripped, cleaned, painted, and fitted new pistons and seals on both front calipers on a 90.
How I did it is here:-


http://forums.lr4x4.com/index.php?showtopic=2851

Pay particular attention to the bolt tightening post a little further down the thread.


Les.

lee celtic:
Les wrote


--- Quote ---Make sure that any machined surfaces don't get paint or powder coat on
--- End quote ---


you have to be careful with the areas around bolt holes as well because if the bolt tightens up against paint when the paint heats up and goes soft the bolt is no longer tight :shock:

I had this problem on a drag bike we built a few years age .We powdercoated the clutch casing and the finnish was a bit naff so we flatted it off and sprayed over the top torqued up all the bolts and away we went as soon as the engine got hot there was a fine spray of oil all up the side of the bike  :shock: lucky we spotted it :)

Range Rover Blues:
Another probelm with painting brakes is that the brake dust is very corrosive and will attact most surfaces.

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