Hello and welcome to JustAnswer!
When does it overheat? Does it do it while driving at higher speeds or with higher engine loads?
Or does it just happen while stopped and low speeds?
How got does it get?
Did it come on suddenly or gradually?
So it doesn't overheat if you are idling or driving at low speeds?
How hot does it get?
Did it come on gradually or suddenly?
You're welcome, and good luck!