1989 plymouth voyager

For sale is an 1989 Plymouth voyager with 80,005 actual miles family owned we are the 2nd owners, grandpa owned since new. Got it for sons 1st car last year, drove it for a bit now its overheating and I don't know why??I've had the water pump, thermostat, radiato, throttle body, hoses and tail light replaced.This is the 2.5 mopar 4 cylinder motor great on gas !My son has since bought a new car I don't know whats wrong.. I've been told air pocket in the line? or a gasket needs replacing...either way I'm not putting anymore money into it...for now, my daughter will be driving next year if it doesn't sell I'll pay the $400-600 to have it repaired if it's the gasket.update on 4/23 I had it running for about 34 min and no overheat light on.5/13 I took it to get washed and some gas put in and the temp light came on.... had to wait about 20 min before I started her again to come home
it is not driveable as it sits, it will need to be towed. Shipping isn't an option.We are outside of Chicago, IL. 60714any questions text me at 773-905-3759