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2007 Impala 3.5l 90,000 miles


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I just started to smell antifreeze when filing the gas yesterday. it over heated once this winter and I added almost a galon of premix. The car is not over heating at all running great the anti freeze leveles seem to be fine. Nothing is leaking that I can tell. What should I look for? I had a 2004 Grand Am that did the same thing and it wound up being the heads but they were known for that. I have not herd the same for the 3.5 but How can I tell this is or is not the issue?

Thanks

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I guess I would watch out for leaks. If your not loosing any coolant now then I wouldn't get to worried about it. At the gas station someone else could have had a leak and you might have caught a whiff of that. It has happened to me a couple times.

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