the belt is tight enough right????????

 

Yeah belt is tight. It is an auto but I have a extra tranny cooler hooked up but the way i have it set up is the hot tranny fluid comes out of the tranny into the stock radiator and then into the extra tranny cooler. Do you think I need to reverse those?

 

Also the exhaust is pretty new cat back, so I don't think it's that. I'll get under it and take a good look at it though.

 

nobody has said anything about timing? If your timing is off it'll definately heat up.

 

timing non adjustable

 

no this is correct

 

fans going in correct direction?????pulling no pushing air??????

 

It could still be in the head, even though it *appears* to be OK with casual inspection.

 

Dude. You've effectively replaced your entire cooling system (aside from the heater core) and you're still overheating...time to live with the fact that you're not going to get your 4.0 to run any cooler than any of us have.
Exactly how hot is "running hot"? Mine generally runs just above half way on the gauge and creeps toward the red under load. I have pushed it well into the red and not had it affect performance but running in the red scares me so I pull it over until it cools down and continue. When it cools down after a good overheat, it tends to stay in the normal zone.
Hard to solve your problem when you seem to have exhausted all avenues of recourse. The only suggestion I can offer is to increase your coolant to water mixture.

 

Yeah fans are good. Both are pulling plenty of air.

 

No there is definitely something wrong. I ran for a long time no problem before this. I know the 4.0 inherently run hot, but you should be able to drive up a small slope going 60mph for more then 1/4 mile before overheating. The only reason it doesn't go into the red is because I stop it before it gets there.

 

its done this ever since you got it,wonder if the correct water pumps on it they make two pumps should be a reverse direction pump??????

 

First: You never told us how many bloody miles are on this engine, and second: Timing , when necessary can be adjusted. High mileage engines will tend to over heat faster than a low mileage engine especially when the timing is off.

 

i gotta hear this how?http://www.jeepforum.com/forum/f11/h...-4-0-a-676938/

 

You remove the index tabs on the distributer so you can adjust as needed.

In the industry we call them "idiot tabs". Keeps the idiots from trying to adjust the timing.