Cylinder wall rust???
I've got a situation on my hands. I recently picked up a 5.0 shortblock, never been run after machining. I got the thing cheap because it had been sitting for a couple years, under plastic. It had been oiled when it was first stored. Anyway, there are a few small specs of surface rust on a few of the cylinder walls. Or at least, what I thought was just surface rust. A friend of mine came over tonight to look at it and said that it was a very common and serious problem that 289s and 302s are notorious for. He said that he had seen it before, and that a machinist told him that it was actually rust coming from inside the block, through the water jackets (meaning the rust was coming from the inside out, rather than just being surface rust). Is there any truth to this, or is he wrong? I had never heard of this, and the block is otherwise very solid.