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Old 09-16-2021, 12:56 AM   #1
pjmoreland
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Join Date: Jan 2005
Location: CA
Posts: 5,289
Question about Valve Seat Machining

I recently had a set of heads machined at a local shop. I noticed that on some of the valve seats, there is a lip at the edge of the seat where it meets the unmachined cast surface of the combustion chamber. It seems to me that ideally this would be a smooth transition instead of a lip. Is having a lip there normal and acceptable?
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