Quincy compressor disassembeled.

[Jake]

Here are some pics of my compressor taken apart. Notice the oil/water laying on top. Not sure what this means as I don't know how this valve system works. This oil/water slime is coming out of my air cleaner. The good news is that the cylinder is not scored and the piston/rings are still tight and there is no lip on the cylinder. I don't think I will do anything with the bottom end. Does anyone know of a compressor forum where I could ask some questions about rebuilding etc? Thanks, Jake
http://members.aol.com/tbolt427/comp/

[Len]

I'd give Quincy a call to see if they have a customer service department that may give you some guidance.

[Phil V]

Jake, I was looking at my Quincy last night and I see a crank case breather line that goes from the crank case (obviously) and then goes up to the air intake part of the compressor head. That could explain where the oil is coming from that ends up in your intake air filter and cylinder head. About the only way a automobile engine will pump oil mist into the air intake is basically for one of two reasons only. One reason would be that the rings are so wasted that the air goes around the piston riings and into the crank case. The only other reason would be a cracked piston ring (but that usually puts a verticle score mark in the cylinder wall that easily visible). Of course on other problem could cause oil in the intake which would be a hole in the piston (which again is obviously not the problem with your compressor). On a car its easy to tell if the rings are worn out simply by taking a compressor check of each cylinder. Look closely on the cylinder head and see if there is some place where you can use adapters to hood a cars compression gauge to the cylinder head. You'll still have to get a hold of Quincy customer service to find out what the cylinder head compression is supposed to be. If I were to make an educated guess about the problem with your air compressor I'd say the rings are worn out which would explain the oil in the pump head and also the long pressure buildup time.

[Phil V]

I have to start proof reading my messages before I post them, there were several typos in that last post.