We changed a water pump, timing chain in one session.
Car ran well for a week. One day the car overheated. Changed the thermostat, upper and lower hoses. Car still over heated. Tech suggested head gasket.
I read about taking the radiator cap off (replacement bought also), and the bleed valve. I ran the engine with the cap off, and the vent open. The overflow went from max fill to overflowing, engine temp went to halfway, and STAYED there!!! The bleed valve blew air but NO WATER. Shut the engine off, and the over flow almost went dry sucking the water back into the system. I closed the bleed valve, installed the new radiator cap, the engine went to over heat again. The vent still blows air. What next??? Engine starts great, no water or oil in the wrong place.

 

Not that I have any advice, my fix was to buy a new Dodge Durango....

But, every summer my Intrepid would suffer from over heating issues. If I drove to the mall, I would have to walk around the mall for almost 2 hours before I was sure it would start up again and get me home. When it would run hot, the AC would run hot as well. In 107 degree temps it is totally miserable to drive around. If it wasn't summer time, it ran just fine, no issues at all. But, in the heat, it would heat up.

 

You should fill the system, install the cap run the engine and open the bleed valve. Put a clear hose on the valve and the other in a bucket with fluid. Once the coolant is flowing w/o bubbles, close the valve. Let the engine cool, add fluid and do again if necessary. These can be a bit difficult to bleed.

Are you getting heat out of the vent? Also ck for cold spots on the radiator…this can mean a clogged or dirty radiator. You can try to back flush it or replace it.