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Why would you be getting an anti-freeze odor through the air conditioner and heater vents on a '97 Buick LeSabre?

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Wiki User
April 09, 2009 12:31AM

Most likely your heater core has a leak. Your heater core is leaking. It must be replace to correct this problem. Anytime you get an anti-freeze smell, this usually indicates a leak in the system, usually the heater core. Have you noticed if the floor is wet under the area where the heater is located? Look for wet carpet on the floor of the passenger side front. Most 3.8 liter GM engines from the early to late nineties develop an intake manifold leak at some point. This is characterized by an antifreeze odor, rough idling, poor mileage, a lack of heat, and antifreeze appearing in the oil. Simple enough to fix, just replace the intake manifold gasket. Might as well clean the throttle body and change that as well. Repair cost for that job plus a tune-up: $600-700, for just the manifold gasket, you'd most likely stay around $300-400.

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You have a blown head gasket. Antifreeze that should be going through a hole in your gasket and then cooling the engine head is going into a cylinder. From there it is going out an exhaust pipe as steam. It is also getting into an oil drain hole and getting into the oil pan. It is inexpensive to get a head gasket fixed compared to the cost of having a blown engine replaced.

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The vacuum supply line from the engine is disconnected or broken. When the vacuum supply is cut off the system defaults to the defrost mode.

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Through the radiator cap no... But it does allow the antifreeze to come out through the cap if the pressure gets too high.

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A gm 3.8 l v6 or 3800 cc engine cannot have antifreeze in exhaust without first getting into the engine. If its getting into the exhaust it may be entering the cumbustion chambers through a damaged cylinder head or head gasket. Also this engine depending on the model year may have issues with the intake manifold gasket, that can cause antifreeze to leak into the engine oil.

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My first attempt would be to replace the fuel filter if it is not getting gas second would be the fuel pump also check for spark and compression

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If your going through coolant then you have an internal head gasket leak you smell coolant because its getting into cylinder and burning

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Antifreeze will be leaking in the floorboard on the passenger side, there will be a smell of antifreeze through the vents.

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If central air conditioner turns on but is not blowing through the vents, check the filter. If it is dirty, change it. Change the thermostat into cool, this will defrost the air conditioner.

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the antifreeze runs through all your water lines in your car . . . . you put it in your water tank or radiator

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The water pump will pump coolant(antifreeze & water) through the engine after the thermostat opens up.

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Use a 50/50 mix of antifreeze and water and fill SLOWLY to prevent an airlock through the top of the radiator

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Ethanol prevents the key ingredient in antifreeze from breaking down into toxic chemicals in the body. Ethylene glycol is the key ingredient in antifreeze and ethanol removes this through the bodies waste.

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Yes. Antifreeze is actually pumped through the intake manifold. If the gasket is bad it is possible that it leaks out

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On my 1990 Buick Lesabre it is on the underside of the dash in the middle of the car. Go to you ash tray and look under the dash. There will be a rectangular hole through the plastic and the plug will be in there.

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No however, you should never put the conditioner on your scalp. And comb the conditioner through your hair, then cool rinse it out. You won't believe how good your hair will feel after.

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depends on what kind of plastic will not with antifreeze jug

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you have a hole somewhere or replaces your radiator

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yes you can. because its just getting all the oils out of your hair from the conditioner. but it makes it hard to brush through sometimes, so you might have to use some spray conditioner, which is only like 3 dollars. (: hope this helpss(: Clarification by Drbits: Shampoo gets your hair and scalp clean. Many shampoos also contain chemicals that stick to the hair and make it more manageable (shampoo + conditioner in one). For many people (especially those with permanents or hair dye), separate shampoo and conditioner is better. If you are using a conditioner, shampooing afterwards defeats the purpose of the conditioner. If your conditioner leaves your hair feeling oily or dirty, it is the wrong conditioner for you - you could try a conditioner for "oily hair".

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some shops have equipment that passes used antifreeze through a filtration process, adds an additives package, and generates recycled antifreeze that meets virgin specifications. Recycled is just as good, or if you like new only that's fine too.

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yes - they both are sweet to the taste which leads to many animal deaths through the careless storage of antifreeze or a leak undetected that is found by the family pet

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then you should have your radiator flushed because you have rust in it. FYI: antifreeze can strip the paint off of your it you spill it. Also, you may need to replace your radiator if the antifreeze is leaking, it may be through a rusted/corroded portion of the radiator.