I have a 1997 chrysler lhs that is over heating it is pushing antifreeze out the overfill hose can anyone help I had the water pump replaced about 2 months ago

Time to replace the thermostat would be the cheapest fix, but not necessarily the required cure. May need to run a pressure test and make sure the cooling system is up to snuff. This may also uncover a possible head/head gasket problem. What engine class and gauge readings when this occurs?

I already replaced the thermostat. How or where can I get a pressure test done? It is a 3.5L and the guage only goes up if you are driving when it runs out of antifreeze.

Both independent garages as well as dealers can run a pressure test on your vehicle. The test of the cooling system will usually uncover any weakness in this area, as well as possibly identifying a head problem. This test should be done along with a compression test of the cylinders. Is there any oil in the antifreeze or is the oil foamy-looking on the dipstick? Either is indicative of a gasket or head, or even a block problem. Get cracking and get checking. There's more to this than meets the eye.

I also own a 97 Lhs having an overheating problem. I dont think its a head problem, When I first noticed the issue I assumed it was just low on coolent. so i filled it up and went on my way. Half way to my destination I notice it was still over heating. when I got off of the freeway i was pulled over to the side of the road checking under the hood and i noticed that the coolent reserve was empty again. I checked the Tstat and it was open so I doubt that was my issue what you do think???

Leaking water pump? Check for wetness at the bottom of the timing belt case.

i would try a compre. check on it first still sounds like head gasket or both.