My engine runs hot (220-230) whenever I'm driving up any kind of incline. Once I start to flatten out it gets down to normal temperature. I've already changed the radiator, t-stat, clutch fan, radiator cap, water pump, radiator hoses and even added a pusher fan. Any ideas? It's the 5.2l.

 

is fan clutch stiff to spin when hot,is it the heavy duty clutch

 

Yes it's the heavy duty one.

 

The engine will run a little warmer with an extra load on it, such as climbing an incline. What is your anti-freeze to water ratio? Too much anti-freeze will not cool as well as a 50/50 ratio.

 

It is a 50/50 ratio. If I continue to climb so will my engine temperature.

 

How does the engine feel? Enough power? A restricted exhaust will cause the engine to run hotter.

 

It feels the same as ever. It has plenty of power.

 

I have a new catalytic converter and new muffler.

 

might be air in the coolant system preventing the thermostat from opening, is the system bled out?

 

I have bled the system.

 

This has got me so baffled.

 

Thermostat may not be opening all the way

 

It's a fail safe thermostat and I already replaced it.

 

Try a mechanical gauge. Yours may not be reading accurate

 

I already replaced the sensor thinking that too.