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Well I honed it out, the pitting is still there and it looks much worse than it feels. Fingernail doesn't catch on anything so I guess it's good enough. At tdc it looks much better 😂

Alright, got a hold of mfg tech and learned a couple things: 1. In general, every inch of cylinder should allow at least 1/1000" of clearance. 2. Apparently pitting in the cylinder isn't a big deal as long as nothing is "sticking out" of the wall. So I'm going to just hone it out some. Worst...

Thanks! This helps a lot. I don't feel any deep gouges. I'll take it over to a shop. Hopefully it only takes a couple thous to clear pitting. Sounds like from video clearance between piston and cylinder wall should not exceed 6 thous. Few more pics Old motor New motor! Reassembled head...

Cleaning cylinders, one of them looks much worse than I initially thought. Is boring it out while keeping same piston size even an option?

Hello, I happened upon a horizontal 80 gallon air compressor that needs some love for $400. Pump looks like a Saylor Beall 707 clone. Body shop I bought it from said they bought the pump originally from NAPA 7 years ago. Pretty obvious the pump fell on it's face at some point. Unloader valve...