I want to unscrew the oil cooler line fittings from the radiator and join them together to bypass the built-in oil cooler in the radiator.

... anyone know the coupler end sizes to join the two lines together? I think it may be a 1/4"-3/8" female-to-female coupler. Does this sound right?

 

Nobody know?

 

Bought the barbed fittings and used the one that worked, which was the brass 1/4" male end screwed into the brass 5/16" female end. I coupled the lines together to do the bypass ... only problem is it made my tranny temps run 15* hotter in town. Sure didn't cool it down like a lot of people said it would.

I'm re-doing it to pass back through the radiator's internal oil cooler, the way it was. Looks like I'll have to put it back the way it was.