the problem is that you are a control guy.....need a service tech.
in many places rebuilt means they take it apart, inspect it, and put it back together using maybe new gaskets. remanufactured as as stated above. without something holding that gasket there, and possibly with liquid entering the cyclinder, you get a double whammy and poof, thar she blows.
wow flange! as usual right on
geez!!! the more i learn the more i know i need to learn!!