I Have an 03 Discovery S built in 10/02 and no factory installed hitch. I have a cooler between the Radiator and Ac Condenser. Where will the oil cooler be? And Is it safe to say that the Discovery without Hitches from the factory has no oil cooler?

 

It's safe to say that discos from late 2002 through 2004 have no oil cooler. Nothing to do with having a hitch or not.

 

Having a hitch makes no difference. The 03 and 04 Discovery's have no oil coolers. They eliminated them. On the earlier models the oil cooler is installed above the transmission cooler. All of the ports exist in the block so you can add one if you want but they don't seem to cool the engines much more. I just tapped into the unused port for my oil pressure sender.