Ok, just would like to clarify, because there's a major confusion between some of the guys in the thread- one of them is talking about transmission problem, thus the transmission oil cooler. The other one is the heat exchanger(as caterashaker mentioned) which is also called the oil cooler, but the engine oil cooler and it's replacement is NOT so easy, because it's located in the "valley" between both engine heads and you have to take the whole intake and vacuum hoses and so on to get to it. That's the one that I will be changing some time soon, because I have engine oil in my coolant. I would like to know if you are talking about that one and if yes, I've been trying to buy the whole kit and change the thing, but every time I try to get the part and go online or ask on the phone everybody thinks I'm talking about the transmission oil cooler or some other kind of external cooler, which makes it very hard to find unless you have the right Part # (thus my final point, what is the freaking part #:-)

Thanks!