I am replacing a heater core in my 1998 F-150, ready to go back with it . I am not sure if I have lost 2 of the o rings or not. Can someone tell me if it is suspose to have 2 rubber o rings or just 1 to each hose. All I have is 1 rubber o ring, 1 plastic o ring and 1 cuppling per hose.
Thanks for the help