My 1994 pontiac sunbird keeps over heating

heres the problem when i drive my car it over heats and it is leaking. i cant find any thing wrong. do any one have any ideas for me to check. and how do i check it.

The problem might be with a bad thermostat. Here’s how to replace it.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528003ba97

Tester

You need one of these to find that leak: http://www.amazon.com/s/?ie=UTF8&keywords=coolant+pressure+tester&tag=googhydr-20&index=aps&hvadid=1100565401&ref=pd_sl_2z0pal9fh0_e

Change the radiator cap, first.

Check the radiator too. From the rear, look for missing fins between the tubes. If you see green or white fuzzy coloring, it’s a sign of radiator badness / oldness / corrosion.

What exactly is leaking and where and when does it leak?

Don’t Drive It Until It’s Fixed. You Are At Risk Of Serious Damage By Doing So.