overheating

I would replace the radiator cap if you have not already.

if you fill through over flow tank they get air pockets and overheat put ass end up higher then motor takecap off fill res up let run it will suck water down when air pocket is gone

This overflow cap is pressurized. Change the cap. Its $8 to 9 and could have saved a great deal of $ on other repairs, but leason learned.