It was -5 this morning and the XJ sounded like it was going to die as I was starting it, the starter turned the motor over so slow I thought I had a dead battery so I'm looking into block heaters, I know you install the ones that heat the coolant on the lower radiator hose so what should the ID be of the lower radiator hose on a 90 XJ with a 4.0? About how many watts should I be looking for? I've seen them from 200-2000 watts. Also, is there any advantage to the ones that heat the oil over the ones that heat the AF and vice-versa?
Thanks
Thanks