Air Compressor Help

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Old 10-24-18, 06:15 PM
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Air Compressor Help

I came across a Grizzly G8889 air compressor 2hp oil. I fired it up and it shakily went to 90psi and then started falling in pressure and never kicked off. So I turned it off (it ran for maybe a couple of minutes) I noticed the air filter was melted on the engine side and i could see trash all in the intake. I took apart the top end of the motor and cleaned it all out really well and changed the oil. Also, opened up and cleaned out all other things I could easily open by hand.

Now the darn thing refuses to go past 50psi, i took the cover off the switch and tightened the bolt significantly and the pressure wont rise. I also tried adjusting some kind of T handled valve that is down pipe from the main cut off valve to the hose, but have no idea what that does. What am I missing?
 
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Old 10-24-18, 07:00 PM
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Welcome to the forums.

Two things come to mind..... bad rings or a defective reed plate.
In looking further..... there is a valve plate and I see several rings and an oil scraper ring.
May not be worth repairing.

Grizzly G8889 Parts list
 
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Old 10-24-18, 08:28 PM
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Everything looked good after the top end was cleaned out, except maybe some of the seals/gaskets were questionable.

After reading this I took the cylinder head off and disconnected outflow line on the right angle connector, then put the head back on. It pumps enough air to where I cannot block it with my fingers. Took the head back off and reconnected the line and checked all the bolts and nuts one last time. Now I have 60psi suddenly.

I think it's definitely the engine, maybe a gasket somewhere? That's my last guess. It also runs constantly at 60psi it will not shut off or maybe I haven't let it run long enough.
 
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Old 10-24-18, 08:43 PM
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A leaking head gasket would be a problem.
 
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Old 10-24-18, 09:06 PM
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I'll try to silicone everything if that doesn't work, im done.
 
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Old 10-25-18, 04:07 AM
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Regular silicone won't work........it can not take the temps developed in the head.
You need a sealant recommended for higher temps.
 
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Old 10-25-18, 04:20 AM
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I was going to use Permatex Ultra Grey RTV
 
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