gtvapsamtik wrote:So i opened up the hood of my pathfinder for first time today. There is a small black Radiator like thing infront of Actual Radiator.

Is this a Engine oil cooler or Transmission cooler ? And how do u turn it on. Car manual doesnt talk about it at all. I just bought this 2010 SE pathfinder the other day.

eieio wrote:

gtvapsamtik wrote:So i opened up the hood of my pathfinder for first time today. There is a small black Radiator like thing infront of Actual Radiator.

Is this a Engine oil cooler or Transmission cooler ? And how do u turn it on. Car manual doesnt talk about it at all. I just bought this 2010 SE pathfinder the other day.

sounds like you have found the external transmission cooler, already in circuit and functional
BTW: welcome to the forum

gtvapsamtik wrote:

eieio wrote:

gtvapsamtik wrote: Thanks I just bought 2010 SE 4x4, so Nissan didnt added engine cooler bcuz it does not get as hot as Transmission oil ?

i think the logic is that the engine, under normal use, does not need an additional oil cooler
the external transmission cooler, i believe, is an aid to increase towing capacity, by helping to keep the transmission oil cooler under heavy loads

08Datsun wrote:All R51s have both an auxilliary transimission cooler as well as an engine oil cooler. The engine oil cooler is water to oil and your oil filter screws onto it.

eieio wrote:

08Datsun wrote:All R51s have both an auxilliary transimission cooler as well as an engine oil cooler. The engine oil cooler is water to oil and your oil filter screws onto it.

oh yeah, forgot about that!