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You need to pull pressure off the back of the head at idle so you need to attach a gauge right off the discharge port there.
Just replaced the head gasket and unloader valve about three months ago.
Did you check the head for flatness? Other members (myself included) have experienced minor head warpage which is enough to cause premature head gasket failure, last time I removed mine for head gasket number 2 I took a large flat file and very carefully decked the head until flat.
Both gaskets? The actual head gasket that is exposed to the compressor piston and the unloader flat paper gasket?
I suspect the unloader is full of water....
If I remember correctly, the unloader had an o-ring seal. Everything was replaced. Sprayed the compressor with soapy water, no visible leaks. Shot a dose of Aerokroil in the line from the governor. I'll run it some and see what happens.
Yes it does have and O ring seal on the top half. But there’s the actual head gaskets here, top left is the unloader “head gasket” and the bottom right is the actual compressor “head” gasket.
I can't get the link to open.Yes it does have and O ring seal on the top half. But there’s the actual head gaskets here, top left is the unloader “head gasket” and the bottom right is the actual compressor “head” gasket.
Top left goes between the unloader plate and physical head
Bottom right goes between the compressor head and “block”/cylinder
On mine the top left gasket had cracks in it, which then allowed air to flow freely between the intake and exhaust side of the compressor gradually getting worse until I no longer had any air pressure.
pm sent
From what I hear, our compressors are more than adequate, but our tanks fall short. Talk to Simp about how adding air tanks changed the nature of the beast
For sure! It’s a little tight, but drain the coolant, pull the bolts and pop it off. Have it and the unloader head machined flat and reinstall. It’s a 2 hour job taking your time
