What is the true operating temperature of the 4.0?

[Josh40601]

So i am trying to find out what the actual normal temp is, what is "getting purty warm" and "Shut it the F off!!" temps are for the 4.0 in my Explorer.

With my Efans running, i usually run around 190*, with them off, i run around 205-210.

Hope you guys can help. Sorry if it is a double post. I searched through, and nothing popped up.

 

[gw33gp]

Those temperatures are fine. If it hits 240 you should be concerned. Above that you may want to find out why it is getting so hot.

 

[Josh40601]

So 240 is cracking heads hot? or middle of the desert with the A/C on and the truck is getting warm?

 

[Gotta_gofast]

My truck stays between 195-200 degrees. With any vehicle or liquid cooled motor I would be keeping a close eye on the gauge at 225 degrees and I'd be turning the ignition off at 240 degrees. If it happened twice I would start looking into a problem within my cooling system.

 

[bobbywalter]

depends on gauge and location.


200-225

 

[bobbywalter]

cracking heads hot is already lost too much water and why i am hot hot....


slow slow leaks that creep up and kill....

 

[Josh40601]

thanks gents. So i will kick the aux fans on around 215-220.