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So my built motor spun a rod bearing at the end of August and I’m finally starting to put everything back together.
While I had everything apart, I had the machine shop do a cylinder hone and check the bores and pistons for roundness just to be safe. I was told the pistons were all reusable.
Today however. I got around to starting the bottom end assembly and found a piece of bearing material embedded in piston #2 (the same cylinder the rod bearing spun on). The embedded flake is completely smooth and doesn’t even catch a fingernail. All of the cylinder walls had minor scoring when torn apart but cylinder 2 wasn’t any worse than the rest.
I’m looking for a second opinion. Should I replace this piston? Try to remove or file down the bearing material? Toss it in and forget about it? Haven’t been in this situation before so any insight is appreciated.
I would scrape it out with a sharp knife and dress the surface lightly with a fine single cut file or stone. Just make sure nothing is protruding pass the skirts surface.
I ended up trying to scrape/pick it out with a box cutter blade then a really sharp pocket screwdriver. Couldn’t get it to budge and couldn’t seem to get under it at all. I ended up using a fine file to take a bit more material off of it (it was already flush with the piston) and installed it. Am I exceedingly stupid to think that it won’t be an issue if it’s a few thousandths below the piston surface?
I ended up trying to scrape/pick it out with a box cutter blade then a really sharp pocket screwdriver. Couldn’t get it to budge and couldn’t seem to get under it at all. I ended up using a fine file to take a bit more material off of it (it was already flush with the piston) and installed it. Am I exceedingly stupid to think that it won’t be an issue if it’s a few thousandths below the piston surface?