on my jeep which has the 4.0 in it i have replaced the thermostat and radiator and the top hose. it runs about 170-190 when im moving but once i stop it goes up to around 225 ish. i have no clue what is wrong with it. and yes the water pump is working

 

Check the fan clutch, and give the radiator and a/c condensor a good flushing to make sure its not plugged with dirt/bugs/etc.

 

both fans are working. radiator is clear of bugs

 

If you hold a drop light behind it can you see light through it?
Typically the heating at idle and not under load is symptomatic of an air flow issue.

 

i will take a look again after school and see. could it be because of a pin hole in a hose or because of a lack of antifreeze by chance?

 

Could be an air lock internally in the engine. Water or antifreeze shouldn't matter. Both will cool the engine.
if its a renix look at the back of the head there is a sensor between #5 and #6 injectors, you can pull it out and make sure the head is not air locked.
I wouldn't pull it with it hot, give it time to cool down and bleed the pressure off the system with the radiator cap before pulling it so it doesn't spew everywhere and burn you.
If its full when you remove the sensor, coolant will immediately start to come out of the hole. So be prepared to reinsert the sensor instantly.

Good Luck with it.

 

what year is it? Is it a closed or vented cooling system?

 

its 1993.. i have no idea what a renix is...

 

it cant be airlocked because it has pressue?

 

could you get me a picture pf this plug by chance?

 

and also my overflow tank will go empty within a few days too?

 

http://www.lunghd.com/Tech_Articles/...BurpAirMod.htm

Note the above is if you have a sensor there. I think the HO's lack the sensor but not certain there.

The overflow tank going empty is not good.
How is the rubber on your radiator cap?

 

its not spewing or anything.. cant find a leak..

 

yes, the overflow going empty is definately not good. No coolant in the oil?

 

no cooling in the oil. i think there might be a pin hole leak in my bottom hose??