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I would be more than happy to give them to you, but one was broken and I actually "micro welded" and shaped it back together. You actually have to look pretty hard to see it was ever broken. I would reuse your old rings. They do not aid in compression in any way shape or form, their job is...

Let me dig my old compressor out tomorrow for caliper measurements.

Run a piece of sand paper around the very bottom edge of the cylinders. It should already be beveled for ease of piston installation though. They could be bigger!

Talk about compressors! A few day's ago I just received my mini air brush compressor kit in the mail so I can start spraying gunstock finishes for my customers. I have already torn into it for my own "beef up" mods to make it last as long as possible. Sourced replacement "oiless" piston rings...

Sweet! Brake Systems Inc still stocks rings, bearings and other parts for this compressor model. The GMC compressor is model N-4119-W. He said the parts book he found it in was old and very dusty. :lol:

If anyone needs stencils of the compressor gaskets, they will be sent to your mailbox free of charge.

Now the crankshaft can be pulled out. Note the semi circle cutout which aids in removal of the crankshaft. You will have to play with it a bit, but this picture should help show the orientation of the crankshaft for removal. Like so..... Next take the compressor head to vice and very sturdy...

Next remove the 6 nuts securing the head to the cylinder body. Pry the head off with a screwdriver. Head removed. No, don't do what I did and put your hand over the cylinder while turning the crank really fast. It sucked my hand down so hard it almost made a circular cut on my palm. :beer...

As before, each paragraph corresponds with each picture below. From left to right. I disassembled, cleaned and reasembled this compressor last year since it came to me seized up from sitting for so many years outside. A hone job and a little rust removal had it back in action, the bottom end...