Question about 1991 Buick LeSabre

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Anti freeze leaking into car vents - 1991 Buick LeSabre

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The heater core is leaking, causing engine coolant to enter the ventilation system in the vehicle. The heater core will need to be replaced.

Posted on May 13, 2010

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Posted on Jan 02, 2017

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1 Answer

Anti freeze smell inside the car no leaks


It may not be leaking yet, but that is a sign the heater core is going out. If not there could be a hose leaking onto the engine causing the coolant smell to come in through the vents. Check engine coolant level and look for leaks in hoses.

Apr 22, 2014 | 1996 Toyota Corolla

1 Answer

Oil leak


Are you sure its oil or is it anti-freeze.If its anti-freeze you will have a sweet smell come thru the heater when its turn on.

Oct 31, 2012 | GMC Cars & Trucks

1 Answer

I see a misty smell like anti freeze coming through the vents in the car


Holy cow you can see smells?????


haha just messing. If you have the smell of anti freeze coming through the vents it means that the heater core needs to be replaced. The heater core cycles the hot engine coolant and uses that to warm the air to give you hot air. If you can smell it it is leaking into the vent system and needs to be replaced.

Apr 22, 2011 | Buick LeSabre Cars & Trucks

1 Answer

Changed thermostat after warming engine smoke started comming through air vents


heater matrix has gone renew it is the only answer ,the antifreeze has found the leak ,its a surface tension agent as well as an anti corrosion and anti freeze

Dec 27, 2010 | 2000 Dodge Neon

1 Answer

After I drive my 1999 boxter the pasenger side exterior vent smells like a radiator and vapor comes out.


This is most likely leaking anti-freeze from the heater coil. Radiator Stop-Leak may help but replacement will likely be expensive. When replacing the heater coil, don't fail to rinse the plenum thoroughly. If you don't do this you will forever smell the anti-freeze....It does not evaporate ! That's why it is used. In the thirties and forties, alcohol was the anti-freeze of the day and it boiled off rapidly....results sere seized engine blocks or frozen systems. Thanks to DuPont for Prestone. Take care, Paul

Sep 07, 2010 | 1999 Porsche Boxster

2 Answers

Antifreeze steam comeing through vents


Your heater core has a leak, it's like a small radiator that heats up and the blower motor blows air thru it to create heat in the car. It is leaking anti freeze into the heater box.

May 12, 2010 | 1998 Mercury Sable

2 Answers

No heat , antifreez leak not visable...


A car this new should have a warranty right? the only other place for anti-freeze to go is through a blown headgasket into your oil. Pull out your oil dipstick and make sure it is not milky in color. If not check behind the engine and see if any coolant lines going into the firewall are leaking. When inside the car do you smell steaming coolant(anti-freeze) or hear gurgling? The temp gauge that stays on is the overheat indicator?

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Dec 14, 2009 | 1998 Chevrolet Malibu

1 Answer

Anti freeze smell entering through vents, i did a radiator flush and filled with new anit-freeze


you may have a leaking heater line, check for leaks on the fittihgs and coolant lines on the system

Sep 28, 2009 | 1998 Mercury Villager

2 Answers

Anti-freeze smell


Hi it could be a leaking heater core matix, Do the foot wells get damp at any time too, Hope this helps

Dec 11, 2008 | 1997 Pontiac Grand Am

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