Question about 2002 Jeep Grand Cherokee

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Smell anitfreeze when turning on the heat

2002 Grand Cherokee 4.7 HO V-8 - There is a stong smell of antifreeze when I turn on the heat. I have been told it is a head gasket leak and I have also been told it is a bad heater core. It also sounds like something is opening and closing in the dash on the passenger side of the car when the heat is on. Any ideas?

If it's the heater core, how hard is that to replace?

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A good indication that the heater core is bad, is if you get a oily film on the windshield when the defroster is on. If the headgasket is leaking, the engine should run hotter than normal,you might get oil in the radiator,you might see coolant dripping down the engine. I would start with checking out the heater core first. It is a very big job(the dash has to come out).

Posted on Nov 18, 2008

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??? heater core


If you smell antifreeze, the problem would be the heater core.
Another indication is when you turn on the defroster and see a oily film on your windshield.
The heater core would have to be replaced.
In order to do this the whole dashboard would have to come out to get the heater box out.
In a dealer the process would take about 4 hours from qualified mechanics who have done this before.

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