Yong Heng Head Gasket Sealer on First Stage Gasket

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I didn't use any sealer. Will check tomorrow for any air leaks.

It's up and running to check that it's putting out air, oil and water leaks.

Just short runs for now with no filling evolved.

Will put some more time on it tomorrow with no loads to wear it in slowly.

There is a BIG DIFFERENCE in the volume of air it's putting out now.

I'll have to drill out the hole for the temperature sensor because it's smaller and threaded.

I have it clamped on right above the hole so hopefully it's accurate enough for now.
 
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Compressor ran for awhile and now it's back to low PSI output.....again 😩
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Again ? what has been done to get it fixed before the reoccurrence ? The only cause of low PSI I have encountered on my YH is leakage. The leak has to be so big that hissing can be heard after the compressor is turned off or 4500 psi can still be reached but it will take a longer time
 
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The above photo of what was replaced shows cylinder/head but not piston. I assume that you replaced the piston assembly and rings (low and high) at the same time as the cylinder? If so, looking for external leaks would be my next step as well but defective new rings are possible. A little soap solution on all the fittings, check the burst disk area, and make sure the bleed valve is sealing.
 
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quote"The only thing you may need to do is to coat the gasket with oil. This will prevent the gasket from sticking to the metal making it a lot easier to be removed when you do servicing the next time. "

I would not put oil on the head gasket of a HP air compressor🔥
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When the compressor is running the oil in the crank case goes through the entire air passage from the inlet to the outlet so I don't think that's a problem. 
 
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Just one more thing to pay attention to in case you re-install the first-stage piston ring. The Yong Heng people told me that the thinner side of the ring should be facing downward. The photo below shows the WRONG orientation : 

1566535369_18877246195d5f6ec9a4f442.20709712_x.jpg

 
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Just one more thing to pay attention to in case you re-install the first-stage piston ring. The Yong Heng people told me that the thinner side of the ring should be facing downward. The photo below shows the WRONG orientation :
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That's a good one! This has to make a difference with how much more volume of air the YH puts out.

I wonder how long have they been keeping this one and and other tips a secret?

Many thanks for sharing!


 
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quote"The only thing you may need to do is to coat the gasket with oil. This will prevent the gasket from sticking to the metal making it a lot easier to be removed when you do servicing the next time. "

I would not put oil on the head gasket of a HP air compressor🔥
Click to expand...

When the compressor is running the oil in the crank case goes through the entire air passage from the inlet to the outlet so I don't think that's a problem.
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No.
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No dino oil that's for sure.

Yes.
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