Got a water leak somewhere in the vacinity of the oil cooler. The plan is
to remove the cooler, replace the seal, install new hoses, then put it back
together. The pipe that is screwed into the case, passes thru the center of
the cooler. It must be removed in order to remove the cooler.

The last time I did this, the internal pipewrench I was using sheared off
inside the pipe and that cause me no end of trouble. I finally had to use
an external pipewrench on it and of course that destroyed the pipe. Had to
buy a new one. Whats the best way to remove and replace that pipe?

I could try locking two nuts together, but I don't know the size or the
thread. I'm sure its metric. Wouldn't know what to ask for.

Any suggestions?

John