06 Cummins. Had to change water pump few weeks back and drained coolant out of radiator drain cock. Upon closing drain cock it wanted to leak fully closed so I turned it back a hair and it stopped. Now it has started to leak again and I can't get it to stop. Anyone else had this issue? Does it just twist out and replace the oring or what? Hell im a diesel tech but I have never taken one out or delt with this style before. Any input is helpful and maybe where I can get one that is the same as mine.

Thanks guys!


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