i have to take out my oil cooler and the line that goes into the oil cooler has 2 nuts on it. I assume you hold one and wrench the other the only problem is only the small one moves and i dont know if im tightening loosening or what. If someone who know what im talking about could please help me i would apreciate it.

 

The inside one should be staionary, the outside needs to be turned counterclockwise to
loosen it. rx7doctor

 

Yes, the 'fitting' thats ON the oil cooler, it's also the smaller size wrench is the one to hold in place. the other 'fitting' thats larger thats on the oil line is the one to turn, counter clock ways, right to left. it'll break loose, just give it a bit more muscle.