over heating HELP?!?!

ok so my 97 gst with 115000 miles on it has been having an over heating problem for about a month now. i see a leak coming from the water pump so i change out the water pump and after was doing good then i notice my heat up agian. i pop the hood and cant see any leaks from the radiator or hoses. it has been a week since the change of water pump. what could it be? thanks for ur help guys.

Check your thermostat. It may not be operating properly. Hell just replace it, they're cheap. Also when was the last time you flushed your radiator?

Check your thermostat. It may not be operating properly. Hell just replace it, they're cheap. Also when was the last time you flushed your radiator?

Good advice.

I remember my old 97 oldsmobile, the radiator had never been flushed since my dad had owned it, and by the time i got it, there was this like mud shit throughout the radiator. Flushed it soon after I got it.....no problems. BTW, it had 123,000 on it when i got it. Looooong time to go without flushing.

I have had the same problems, and when everything was said and done, it was a hair line crack in a hose (usually running out of the radiator or thermostat housing). I have noticed with my car that if a clamp is not tight enough or a slight crack is in a hose it will overheat (no matter how small!)... RE-Checking all hoses and clamps and ensuring fluids are full would be my suggestion after all else fails...

With 115k, you might want to look into a compression test, just to rule out the HG.

http://www.dsmgrrrl.com/FAQs/compression.htm