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So what would the problem be if everytime you turn on the heat it smells like anti-freeze?


I'd say it's probably a small-ish leak in the heater core.

With a larger leak, at some point you wouldn't just be smelling it; you'd eventually have drops (or even a sizable puddle) of antifreeze in the passenger-side floorboard.

If left unchecked, that small-ish leak could easily turn your Isuzu into a prime candidate for a Herc'd interior.


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Six Isuzus, so far... still have three of them.