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Old 04-27-2019, 08:32 PM
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air compressor

I have older model Kobalt 60 gal compressor and Ive rebuilt head, put in new reed valves. Compressor runs and builds up pressure but very slow and smells oily. What could be culprit?

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Old 04-28-2019, 05:57 AM
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How did it work before the head job? (NPI) Might need rings. What kind of oil are you using, or is it one of those oil less ones?
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Old 04-28-2019, 09:03 PM
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Im using regular compressor oil. When I took head off of it there was a little bit of oil on top of the piston.
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Old 04-29-2019, 07:10 AM
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How did it work before the new valves? Same thing or is this new? I've heard from old timers that their compressor never worked as good after cleaning the reed valves. I think they get a little gummy and seal better. I'd run the hell out of it and see if it gets broken in. Otherwise plan on new rings and honing the cylinders.
Mine is almost 50 years old and going strong. Although I don't know it's history, I've only had it about 7 or 8 years. It's a Saylor Beall.
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Old 05-03-2019, 08:14 PM
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it worked fine but would plug up valve on compressor and it would leak out all the air. There is some oil on top of the piston.
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Old 05-04-2019, 04:57 AM
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Quote:
Originally Posted by mitmaks View Post
it worked fine but would plug up valve on compressor and it would leak out all the air. There is some oil on top of the piston.

If it was leaking out after stopping, it was most likely either the check valve where the air goes into the tank, or the unloader valve that takes the pressure off the pump after it stops. (that truck air brake sound when it stops)
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