Hey guys, new to forum. Looks like a great place to find good information. I have a 2001 xplorer 400 and the coolant line connecting to the engine has come loose. It is a metal male connection going into a metal female connection. I can't figure out if there should be an o ring or something to make connection tight. Does anyone know how to connect this connection? I am thinking about using j b weld but I know that isn't correct solution. Thanks.