Can anyone help?
My compressor will not charge greater than 2 Bar of pressure. I've checked for leaks and cannot find anything. Thought it maybe head gasket, but it seems fine with no damage or splits. Air is sucking through air filter ok. Pressure regulator is working ok as pressure falls when turned anti-clockwise.
The only thing that I suspect maybe the valve holder plate, but don't want to replace this if it won't fix the problem.

Any advice would be most welcome.

Thank you in anticipation.

Gary