one of my central pneumatic #92504 air compressor cylinders(v or 2 cylinder style) was not sucking air into the intake so I took off the air cleaner housing to look into the intake hole on the cylinder and noticed that the nipple on the air cleaner housing (plastic) looked it had sustained heat damage( a little melted) and the one on the other cylinder was not. It has the proper oil and up to level.....can you help me figure this out please?