How can you tell why a 98 Pontiac Sunfire is leaking antifreeze without taking it to a mechanic?

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look to see were the green stuff is coming from lol check the hoses and the pump itself and don't forget to check the heater hoses and core

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100% correct. All a mechanic would do is look for the wet spot or the place that has dried crusty antifreeze. Plan on climbing underneath and getting a little dirty. If it's leaking at the radiator don't just put in a can of radiator stop-leak. That stuff will just cause you problems in the long run. If the radiator leaks, take it out and have a reputable radiator repair shop look at it. If you have green/brown streaks from the water pump it will HAVE to be replaced.

First answer by Redbeard. Last edit by Redbeard. Contributor trust: 3548 [recommend contributor recommended]. Question popularity: 44 [recommend question].