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#1
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Exhaust-like smell coming through heater vents
I seem to have a rather unpleasant smell coming through the heater vents that almost smells like exhaust. It doesn't really smell like burning fluid (neither oil nor ATF). Has anyone here experienced this and determined the cause? I don't hear any exhaust issues other than the resonator which buzzes a bit
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#2
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Re: Exhaust-like smell coming through heater vents
If it is sweet smelling it could be the heater core leaking or a hose. Get a battery powered home CO alarm and put it on the front seat. That will tell you if it is exhaust or not
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#3
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Re: Exhaust-like smell coming through heater vents
If it is the heater core leaking, your windshield will fog over if you turn on the defrost before the engine heats up.
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#4
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Re: Exhaust-like smell coming through heater vents
That's a good idea! I'll try it and post back.
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#5
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Re: Exhaust-like smell coming through heater vents
Power steering leaks have been a persistent PITA for me and that smell comes in through the vents. If you see drips under the car, put paper towels under there and look at the color of what drips.
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#6
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Re: Exhaust-like smell coming through heater vents
There may be a slight ATF drip from the PS pump, but it sure smells like exhaust.
Last edited by FM977; 01-22-2013 at 02:14 AM. |
#7
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Re: Exhaust-like smell coming through heater vents
Exhaust flowing into the coolant may be the sign of a heat gasket issue.
If you smell the coolant reservoir under the hood, does it smell of exhaust? How many miles on the engine? A quick test to see if your getting combustion gasses in your coolant via a head gasket: Smell the coolant. If its bubbling into the overflow tank, give it a sniff as well as when its cold pop the cap on the radiator and do the same. If it smells like exhaust or gasoline, then regretfully you have a bad head gasket. This will lead to your radiator blowing all of its coolant into the overflow tank in a short time, like a few days. Pop the cap when your car is cold and see if the radiator is loosing a lot of coolant. Its a tell-tale sign. .
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