Will a motor rust on the inside?

CRE

7M-GE + MAFT Pro + T = :D
Oct 24, 2005
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Denver, CO
The worst case of rust inside of a block that had been sitting that I've seen was inside the bores, beneath the pistons. The pan was left on and the condensation just kept eating away at it. It had been mostly drained, but that's not always enough