Originally Posted by stu454
The opposite of what we're used to with the 4.0/4.6.
How so, Stu?
More power = more heat. Running hotter at idle makes me think of a bad fan clutch.
Around 65-75F outside, my 4.0 will idle at about 175F, climb to 186-192F on the highway, and up to 201F - going 55mph up a 6% grade.