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Old 09-30-2022, 05:47 PM
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Ironman Ironman is offline
Iron Modification Investigator
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 16,782
Default Quincy 325 compressor

No, this thread is not about a great yardsail deal. I wish it was.
Without air my shop is about as useful as an extra ball. Most tool just act dead.

I noted it took away to long and could not get up over 130 psi. So I pulled the dripstick and there was more blowby than normal...I think. So I figured lets pull some valves out and peek at the bores. They looked beautiful so no gouged cylinder wall. But I noted aluminum flakes and one piece of aluminum 1/2" long trapped in the HP exhaust valve. I dumped the oil, clean and clear and no flakes in the sump.
Con rod big ends are snug and have no play. So where is this aluminum coming from?
HP piston is cast iron. checked by a magnet.

What I don't know is what the LP piston is made of. I put a bore scope down and it looks great.
Does anyone on here know if it is cast or aluminum? I rebuilt this thing sometime around 2010, and I can't remember.
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