Flash rust cylinder bore, This is an issue that will lead to losses on that cylinder. If this something i can just remove with a very light Nov 21, 2013 · Re: Rust pits in the bore by Fordracer347 » Thu Nov 21, 2013 4:40 pm I agree with Dave. Now i go back to it there is slight, very very slight surface rust in a few of the cylinder bores. Just beginning assembly and I've noticed some small rust spots on the cylinder walls - pics attached below. Aug 1, 2010 · Before attacking the rust, cut a piece of heavy plastic or cardboard into a circle that fits snugly down into the cylinders. Putting this into each cylinder will help keep contaminants from falling down onto the pistons and past the pistons into the crankcase. Dec 26, 2021 · After going at it fairly aggressively with some green Scotch Bright and WD-40, the rust has been removed. Jun 4, 2025 · In fact, depending on how thick the cylinder walls are in your particular block, you may not really gain any extra power from the extra displacement gotten by boring that far out. If your turning the motor over with rust and crud you have a very good chance of scoring up the rings and scratching the walls. Jan 30, 2010 · There is a whole lot more abrasion inside a new engine than a little surface rust.
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