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Polishing a metal engine block with a dremel- bad idea?

Sep 04, 2007 by roberticvs | Posted in Motorcycles

I have a '83 KZ750 motorcycle. I just discovered today that the wire brush on my dremel can polish the engine block; it actually makes the engine block bright and shiny. Is this a bad idea? Will my engine block rust? Am I removing some protective coating?

The engine block of almost ALL modern bikes are made of an aluminum alloy. Aluminum doesn't rust, but rather oxidizes.
I know the side covers are coated, but I don't believe the engine case is. If so, no damage would be done by polishing the c

strech | Sep 04, 2007

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