Car Smells Like Antifreeze When Heater Is On

Antifreeze has a sweet, syrupy odor, and smelling it inside a car usually means there's a leak somewhere in the cooling system. Has anyone else experienced this. When using heater could smell antifreeze in car and had greasy. Coolant has a sweet smell like candy, if your car is leaking coolant or antifreeze, you will notice the sweet smell coming from your engine compartment or inside your vehicle if you heater core has failed. probably got a dose of coolant laden air through the fresh air vent when the top hose blew, once coolant is on the heater core it will smell like coolant for ever until U pull the core and thoroughly clean it. 2007 Escalade, 49K miles. But coolant smell or cloud from the vents is usually a sign of leaking heater core. Air that blows in smells damp, musty, or like mildew and mold; Your cabin does not warm up in cold weather, or is just a little warmer than outside; The defroster takes longer than typical to operate, or does not operate; Your heater or A/C only functions when driving, not when idling, or quits blowing when the car is stationary. The smell of leaking fluid attracts wild animals and is very poisonous, so make an appointment with your auto shop as soon as possible to take care of the issue. Looked under hood and there was antifreeze wetting every thing. This component circulates warm air inside the passenger cabin. I will try this. Antifreeze smell coming from my Jeep Cherokee? Why does my Jeep Cherokee smell like antifreeze after I've been driving for awhile and I shut it off. It doesn't take much to smell antifreeze and it probably evaporates before you would see any trace of a leak. If smells like rotten eggs/petrol and air, probably an exhaust leak. I let him do this for $800. The corrosion inhibitor stuff, that does wear out after a few years, that's why the flush ritual. I'm going to check the coolant tank and oil level when the truck cools down a bit more. What could it be?” “Can I drive my Mini Cooper with a coolant leak?” It’s not uncommon for Mini owners to experience problems related to coolant leaks. Replace drain plug. It's actually coolant vapor. Not a single thing has not been changed in regards to the coolant circuit and I can STILL smell coolant very faintly when the heat is on. Whether or not the car got all foggy when the heater core broke, an unmistakable sign of a leaking heater is a fruity, sickly-sweet smell inside the car. Now, at the heater core, there is a coolant that might simply start leaking and reaching the heating system or air-conditioning system, which causes that car smells like burning rubber. If you notice your heater is producing an antifreeze burning smell then there is a good chance that antifreeze is leaking into the heating system. Coolant that smells like fuel. What Happens To A Car Without Coolant Or Antifreeze?. Yes you are NOT running the heater…however water/antifreeze is still circulating through it. also the pass side floor would be wet/stained from a leak. I believe I have to replace the heater core, but really don't want to of course unless it's absolutely necessary. Smell it and see if it smells like antifreeze. The smell of coolant is notoriously strong, you can smell antifreeze a mile away from just a pinhole leak that can go on for months without your coolant level even dropping. Sweet smelling exhaust There are plenty of smells emanating from your car and some of them are perfectly normal, even if they are annoying. Does it smell like burning antifreeze? Usally it means that the heater-core is going bad. Many people find that a plastic bag stuck in the engine will create a burning smell. You can also have parts of the heater core itself melt which causes a burning smell. The odor itself will typically drift in through the AC ducts, and it may not last for too long, as the burnt fuse doesn’t make a continuous smells like some of the other problems on this list. The smell was like cumin and garlic mixed together. You will end up with Anitfreeze all over you passenger. Given that it is summer and your car heater is off, so to speak, it would be very odd that your heater core is leaking but you never know. Leaking coolant smell. Unfortunately, this idicates that the heater core, which is similar to a radiator, will have to be replaced. If there’s a leak in the heater core, you’ll likely notice the smell of antifreeze inside your vehicle. After thorough flushing (keep flushing for a little bit after you no longer smell antifreeze) turn off city water or pump. It only smells like antifreeze burning when I have driven the car. Average repair cost is $700 at 29,200 miles. Antifreeze smell and vapor coming through vents - 1996 Jeep. The challenge I now have is identifying the pipe that's to blame! I've added a photo of the offending article with the hope that someone can help? I've topped up the coolant a couple of times, and even when the engine is cold, there's a constant drip coming from the underside of either the pipe or connector. The morning commute can be stressful. The flap had fallen off it and it was letting exhaust fumes and other fumes into the car. Antifreeze gets very hot and will start to steam, especially if it's spraying onto a hot engine or running down a hot radiator. Quick Answer. Leaking antifreeze, smell from A/C and heat. I was hoping it would stay out there and we could drive off into the sunset. 2005 tj smells like coolant when air/heat is on. Mechanics say your car heater can break down for several reasons. In the last week I keep noticing, when I first start my car the vents smell like antifreeze. This would perfectly coincide with your smell of 'burning antifreeze' but no visible leaks :yes: My heater core hoses leak enough now to where they leave a puddle in the frame. It works by drawing heat out the antifreeze/water mixture and then siphoning it through the cabin. Another suggestion to check the heater core. this smell disapates while driveing and just started during our recent cold snap -20 degrees below zero. On this model, the labor to remove and install can be very high. For instance, you might have antifreeze leaking and it burning off smells like plastic. The Heater Core. My car was giving off a bad smell every time I turned the heater on. She gets in an immediately goes “WTF is that smell? It smells like rotting fruit in here!”. I had a smell in my 01 and it took me months to figure out it was a vent in the passenger side trunk. Lower radiator hose Thermostat Upper radiatorhose Radiator. i have a very strong coolant smell inside the car when heat is on and a strong coolant smell outside of the car. The overflow jug was not up to full cold. Replace drain plug. You will end up with Anitfreeze all over you passenger. The heater core could also cause this problem. The smell of leaking fluid attracts wild animals and is very poisonous, so make an appointment with your auto shop as soon as possible to take care of the issue. this usually can indicate a couple things. This smell needs to be removed, not only because it causes discomfort for other passengers, but also because the micro-organisms behind it can cause allergy-type illnesses. Q: My car keeps overheating once it heats up. Common problem for. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. Antifreeze can smell like fish, and it CAN leak into the car through the heating system. either u have a coolant leak in your heater core, or a coolant leak on your engine. Coolant has a sweet smell like candy, if your car is leaking coolant or antifreeze, you will notice the sweet smell coming from your engine compartment or inside your vehicle if you heater core has failed. So, you will get plastic/rubber burning smell. Does your car smell like antifreeze when you drive it? If so, this could be a sign that your car’s heater core could possibly be leaking. The computer then uses this data to maintain optimum driveability especially while the engine is warming up and until it reaches operating temperature. The antifreeze level is not low. Does your car smell like antifreeze when you drive it? If so, this could be a sign that your car's heater core could possibly be leaking. No smell of antifreeze in the car at all, the floors are dry and no extra moisture when using the defroster. coming from the rear of the car. Coolant that smells like fuel. I have replaced several of these for the same concern. Ever since I bought my 2003 TF, there has been a strong smell of coolant when the car has had a good run (although I drove 3 or 4 before buying and all seemed to do the same). Carefull here as with mine if I opened the cap it would just about drain the rad in one big. This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. My 2007 Pontiac G6 with the 3. Basically it is the cam covers leaking oil slightly from the bottom corners nearest the bulkhead, onto the exhaust manifolds. Just went through the same thing with my 289. Are you sure it is a coolant smell?? You said close to a coolant smell right. A lift is a very handy thing to have for the obvious things, oil changes and hot rod mods but it's also helpful for cleaning and inspections as well. It's too cold here to work on the car so we're waiting for better weather. Engine coolant (aka antifreeze) comes in all colors (green, pink, yellow, blue, red or purple) so it can be difficult to identify. foam started coming out of the air vents in the car now I don't think the accident had anything to do with the aircon stories, just trying to paint a bigger picture. 5L v6 engine is loosing anti-freeze. There was no visible leak anywhere. No coolant inside the car. The last few years I have noticed problems with getting heat from the heater core. We have added several times, but gets low after driving a few weeks. It's like hitting your head against a brick wall and. The Engine Coolant Temperature Sensor (“ECT” for short) is an analog sensor which, as it’s name says, measures the temperature of the coolant and feeds this data to the on-board computer. It smells more like acetone/nail polish, than coolant, but the radiator was replaced 2 weeks before Christmas, the new part could have put a strain on an older part? If you are running the climate system in auto, then yes, it would be directing the air to the feet and blowing it to the rear of the vehicle. I took it to a mechanic who said my heater core needs replacing. Coolant has a sweet smell like candy, if your car is leaking coolant or antifreeze, you will notice the sweet smell coming from your engine compartment or inside your vehicle if you heater core has failed. Along with steam, your car’s temperature gauge will rest above the normal limit and you might notice a strange smell emanating from the engine. The heater core doesn't seem to be leaking in the floor. It's not overheating, and once it sits and cools down a bit, the smell goes away. It contains ethylene glycol which can give off a sweet scent. I'm assuming it's a sweet smell?. if not, you could have a coolant leak in the motor and/or hoses and you smell it as it evaporates from the engine heat. while waitin i noticed the car heated up but the air never di. People often find plastic bags and other objects stuck in the engine, causing the frustrating issue that car smells like burning plastic. Smell Coming From a Car Air Conditioner I believe many of you might have what happened to my minivan a few years ago and it is the a/c evaporator which is usually behind the dashboard; it accumulates bacteria and mold till it gets strong enough to smell like piss, fish, rotten smell, etc. also the pass side floor would be wet/stained from a leak. Its a raw smell of fuel coming out, not anti-freeze. Antifreeze in the cooling system Heater hoses In the heater, hot coolant circulatesthrough a matrix, heating the air which isblown into the car. Menu Why Does My Heater Smell? 07 March 2015 on Heating, carbon monoxide, Tips. This smell needs to be removed, not only because it causes discomfort for other passengers, but also because the micro-organisms behind it can cause allergy-type illnesses. also the pass side floor would be wet/stained from a leak. I originally contributed it to new car smell. I checked my coolant reservoir tank and it appears to be empty and I am not sure where to go from here. i come from class turn the car on n wait for my windows to defrost. Antifreeze flows through the engine and removes excess heat so that you don't have an engine meltdown. This sickly sweet smell is far from edible. The morning commute can be stressful. Smells like gasoline coming out from my car heater, why? The tank for the antifreeze is full. These new "permanent" antifreeze products will wreak havoc on old radiators made of copper, brass and lead/solder. No coolant in the oil. The temperature gauge is fine and no warning lights come on. i have a very strong coolant smell inside the car when heat is on and a strong coolant smell outside of the car. But you can put your nose up to the vent and smell an odor. As I was in the sun, I can see a fait mist but it went away as quick as it came. Best Answer: what you are smelling is coolant. I think it's a heater core, but there is no quote on your site to fix that specifically, just upper or lower hoses. Electrical Short. A sweet-smelling aroma and antifreeze smell could indicate that the car's heater core is leaking. I checked my coolant reservoir tank and it appears to be empty and I am not sure where to go from here. antifreeze smell through vents. Since then I still smell coolant from the vents when I first put the heat on with blower on high. I let him do this for $800. If your car smells like antifreeze, it could mean that the vehicle’s heater core is leaking. From the location you give it could be oil leaking out from the valve cover which while it may sound serious is likely just a gasket that needs replacing ($20 or so in parts). The heater core is responsible for circulating warm air in the car’s passenger cabin. It works by drawing heat out the antifreeze/water mixture and then siphoning it through the cabin. If you can do the work yourself, a heater core can be replaced for $50 or less. Ok, Today I started the car up and let it warmed up to almost normal and noticed a smell of coolant from the vents on the dash. I will try this. I was browsing the archives and looking up a hot topic on heater core failure. A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater core. Anti-freeze smell is a very sweet smell and is usually detected inside the vehicle. Smell One: Maple Syrup. My car has 118000 miles. We have added several times, but gets low after driving a few weeks. Before they leaked so much, it would drip onto the exhaust downpipe and just smell like anti. It smells like syrup: This could mean a coolant leak. Mention the smell when you drop the car off and ask them to check if you may have a small leak on the heater. You will end up with Anitfreeze all over you passenger. I was browsing the archives and looking up a hot topic on heater core failure. Somewhere the exhaust was getting into the water jacket and that was pushing the coolant out. lately hes been smellin antifreeze but he cant find any leaks or puddles on the ground. No coolant in the oil. Coolant Smell along with no Heat Hey guys, recently my heater has slowly dwindled now and even after 15-20 min of driving it still seems to be weak! Blowing air pretty much with a bit of heat - and there is a distinct coolant smell (although sometimes it can also mix with the fuel line problem known to 02 WRX's and cause even more. coolant smell but no obvious leak Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. On this model, the labor to remove and install can be very high. Like Aurin suggests it could be coolant but there is several other types. So I grabbed a thick rag and. My car was giving off a bad smell every time I turned the heater on. This is normally in the heater motor. If the smell is coming from inside the car only when the heater is turned on, the problem is either with the heater core or the heater hose. tthere is a antifreeze/coolant smell in my car, unable to get rid of it. In late 2016 my upper heater hose swelled up like a balloon, and then burst, another 150 dollar repair. It sounds like a leaky heater core, Brenda. My car has 118000 miles. A year ago I sealed an external leak where the heater core mated up to the in an out lines. There are several issues that may cause car smells from the heater core. The heater core in your vehicle is important for keeping the inside of your vehicle warm: it pulls heat out of the coolant system in your vehicle an circulates that heat inside of your car. If you start the car before the coolant has a chance to evaporate, you will see white smoke which smells like antifreeze coming from the exhaust. It doesn't take much coolant to make a whole lot of stink, especially if its in the heater core. Starts/idles/drives great. One way to know for sure is observe your windows. Can someone describe it? I think I will try to find a bottle of coolant and smell it. * A sickly sweet smell –. For what it's worth, my own car (Peugeot 406) has this smell without any loss of coolant nor any leaks on the heater. Coolant should always be mixed with water, preferable distilled water, because water displaces heat better than coolant / antifreeze (coolant and antifreeze are one in the same) however the coolant / antifreeze boils at a higher temperature than water alone and freezes at a lower temperature than water. Home \ Repairs & Maintenance \ f250 diesel antifreeze smell my buddy has a 99 f250 diesel with the 7. If you leave the dial all the way on cold it should cut down on how much of the smell/steam you get, but you're gonna wanna replace/repair that soon. The temperature gauge is fine and no warning lights come on. Has coolant smell when heat is on (any setting). When you turn the heat on a door opens up that diverts the air over the heater core that will heat the air and pass it through into the cabin. In late 2016 my upper heater hose swelled up like a balloon, and then burst, another 150 dollar repair. I tried Blue Devil after reading a lot on it, the leaking has stopped and I haven't had to put any new coolant in in two weeks, but there is now a strong smell of coolant whether I run the A/C or the heater. Whether or not the car got all foggy when the heater core broke, an unmistakable sign of a leaking heater is a fruity, sickly-sweet smell inside the car. A green damp spot on the front passenger side carpet or mat is usually evidence of the leak. It was leaking from the Water Housing Gasket before, and I replaced the gasket, removing all the excess and such, maybe I just put it on wrong?. I sprayed some Lysol in the cabin air intake with the fans on high and doors open - funk was gone after that. I even sprayed Febreze in the vents thinking it was residual. This kind of a problem means it's a good idea to take your car into a professional. When you drive the car and have defrost mode on, does the windshield steam up from the vents and smell a. A heater core is a radiator-like device used in heating the cabin of a vehicle. It had the smelly, wet, and yucky carpet in the passenger side floor pan. Antifreeze smell coming from my Jeep Cherokee? Why does my Jeep Cherokee smell like antifreeze after I've been driving for awhile and I shut it off. if not, you could have a coolant leak in the motor and/or hoses and you smell it as it evaporates from the engine heat. Most definetely sounds like a bad heater core. they are a short term fix that could cause more serious issues later. If your air conditioner leaked out in such a manner that you could smell something in your car, it would have been a very large leak and the smell (of the oil)would have passed quickly. It smells sortof like electronics. this usually can indicate a couple things. I've noticed that sometimes when the car is in idle, white smoke comes out under the glove compartment, it comes out as a thin thread of white smoke that smells like burning antifreeze. ” “I see blue liquid under the front of my car. If you smell maple syrup outside the car, this might mean that you have a leaking radiator cap or that the radiator itself has a leak. Let remaining water drain from heater. But if the radiator has a leak, there will be insufficient coolant to cool the engine temperature of your car. I have not felt anything different in terms of loss of hot air coming from the vents. Now, at the heater core, there is a coolant that might simply start leaking and reaching the heating system or air-conditioning system, which causes that car smells like burning rubber. 2005 tj smells like coolant when air/heat is on. When your car starts to overheat, it’s essential that you pull over and call an auto repair shop for assistance. IT'S MAKING ME MENTAL!. A year ago I sealed an external leak where the heater core mated up to the in an out lines. It seems they built the car around that core. FYI most car AC holds only around 2 lbs of refrigerant. If there’s a leak in the heater core, you’ll likely notice the smell of antifreeze inside your vehicle. I think it's a heater core, but there is no quote on your site to fix that specifically, just upper or lower hoses. However, now that winter is almost here and I have started to use the heater, there appears to be a coolant smell in the car as well which I think is coming through the. Coolant has a sweet smell like candy, if your car is leaking coolant or antifreeze, you will notice the sweet smell coming from your engine compartment or inside your vehicle if you heater core has failed. It works by drawing heat out the antifreeze/water mixture and then siphoning it through the cabin. A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater core. If you can do the work yourself, a heater core can be replaced for $50 or less. On this model, the labor to remove and install can be very high. I have been sensitive to the smell. Its a raw smell of fuel coming out, not anti-freeze. Just for starters. I vacuumed the water out with a wet dry vacuum and let the car air dry. Hey - Check your heater hoses!! They are RIGHT over the exhaust down pipe. A leaking heater core is the most likely cause. Smoke coming from A/C vents-smells like antifreeze I was driving on the freeway and I noticed a smell of hot antifreeeze and I assumed it was the car in front of me. Smelling antifreeze when I run heat. Smell it and see if it smells like antifreeze. What you will smell is the oil. Or maybe your car shakes as you drive it, or you're starting to smell exhaust or gas in the car. I know in other cars I've owned this is usually a heater core issue scent. confirm this will be to check for collant inside the car. You will more than likely see coolant dripping from the drain tube located in the plenum part of the heater case that is mounted to the firewall if the leak is bad enough. The heater core of your vehicle contains an antifreeze and water mixture, and it uses this mixture to regulate the temperature of the air inside your car. I'm just going through this with my Jaguar XJ8 daily driver. Putting some context to the other answers here: * Your car heater contains a loop that splits off the circulating coolant (anti-freeze) in your engine. Your problem may not be the exact problem I have but if the leak is very slow, it won't hurt the car to drive it providing you don't let the level get too low. If your air conditioner leaked out in such a manner that you could smell something in your car, it would have been a very large leak and the smell (of the oil)would have passed quickly. My 2000 Lincoln town car blowes white smoke and smells like antifreeze what can it be 3 Answers. Carefull here as with mine if I opened the cap it would just about drain the rad in one big. I originally contributed it to new car smell. It had the smelly, wet, and yucky carpet in the passenger side floor pan. Sounds like a heater core. When you turn the heat on a door opens up that diverts the air over the heater core that will heat the air and pass it through into the cabin. I Added antifreeze several times. If you smell maple syrup outside the car, this might mean that you have a leaking radiator cap or that the radiator itself has a leak. The heater core in your vehicle is important for keeping the inside of your vehicle warm: it pulls heat out of the coolant system in your vehicle an circulates that heat inside of your car. I was outside applying coolant to an overheated car,though the coolant compartment had a leak so I applied it under the radiator cap. COOLANT SMELL no coolant leaks. Another insisted that I put some in his 34 Packard Eight. It smells worse when the heat is on and hasn't gotten worse in that time and only requires adding a little extra coolant to the overflow every few months. Not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. Heater cores are responsible for circulating heat inside. I drove 50 miles this morning, used the heat and the defrost (both working HOT)…there was a faint smell of antifreeze in the cab BUT the engine smelled like burning antifreeze (the temp of the car went from cold to the proper range - the middle…). How to Check and Change Your Antifreeze/Coolant Do you even know why you put Antifreeze/Coolant into your car's radiator? The engine of a car produces high levels of heat when it is running and the fluids flowing through the radiator system help to draw some of the heat away from the engine so it doesn't over heat and in colder weather it. It's not overheating, and once it sits and cools down a bit, the smell goes away. Which is how they check at a shop, checking to see if combustion gasses are present within the coolant, can't say I've seen it so bad that you can smell it, but this is a Porsche we are talking about here. When you turn the heater on it dirverts coolant to the heater core. The morning commute can be stressful. Hot coolant from the vehicle's engine is passed through a winding tube of the core, a heat exchanger between coolant and cabin air. This kind of a problem means it's a good idea to take your car into a professional. If the smell is coming from inside the car only when the heater is turned on, the problem is either with the heater core or the heater hose. The corrosion inhibitor stuff, that does wear out after a few years, that's why the flush ritual. "Freon" has no smell, unless its exposed to a flame. I Added antifreeze several times. There are several potential reasons for the odor. Whether your car heater or A/C smells sickly sweet, simply stale, acrid like burning rubber, or distinctly urine-tinged, all of these different gross car heater smells can be associated with a specific problem, which means each also has its own specific fix. The coolant reservoir also seemed like it was boiling inside. You could also check for coolant dripping from the AC condensate drain. I will try this. Another insisted that I put some in his 34 Packard Eight. The burning smell can come from either a blower motor that overheated or a mechanical failure of some sort. Car Smells Like Its Burning And The Engine Coolant Leaks Have Fixed The Hose What Else Can It Be My car smells like it’s burning and my engine coolant is leaking rapidly. I have been sensitive to the smell. The smell of coolant is notoriously strong, you can smell antifreeze a mile away from just a pinhole leak that can go on for months without your coolant level even dropping. i wish i had more info but thats all he gave me. corolla 2014 when heater is on i get a smell like antifreeze inside what could be the problem - when using the heater i get a antifreeze smell in the insid × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. A crack in the heater core will discharge antifreeze and you will get the odor inside. For instance, you might have antifreeze leaking and it burning off smells like plastic. Antifreeze gets very hot and will start to steam, especially if it's spraying onto a hot engine or running down a hot radiator. Other common signs of a bad heater core include a foggy windshield, a water surging sound inside the dashboard and wet carpeting on the front passenger side. If one or more of these issues is present, your vehicle may blow out cool air rather than heat: Not enough coolant in the engine; Problems with the heater core. 2012 Chevy Cruze purchased in August 2012. Cars today are incredibly complex and sophisticated because a car's computer controls mostly everything in a car. coolant smell but no obvious leak Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. It seems they built the car around that core. Turn the car on and then turn the heater on high to determine if the antifreeze smell is coming from inside or outside the car. A lift is a very handy thing to have for the obvious things, oil changes and hot rod mods but it's also helpful for cleaning and inspections as well. This smell needs to be removed, not only because it causes discomfort for other passengers, but also because the micro-organisms behind it can cause allergy-type illnesses. Electrical Short. But after the new car smell dissipated, it smelled like coolant. Sounds like you have a leaking heater core. We have added several times, but gets low after driving a few weeks. Another insisted that I put some in his 34 Packard Eight. About 2 months ago I had to have the water pump replaced, but I can't see what else this could be. I Added antifreeze several times. corolla 2014 when heater is on i get a smell like antifreeze inside what could be the problem - when using the heater i get a antifreeze smell in the insid × We use cookies to help our site to work, to help us understand how it is used, and to tailor advertising on this and other sites. You will end up with Anitfreeze all over you passenger. Heat requests are usually drawing air from outdoors and any leaks COULD make an odor - even strong. From the location you give it could be oil leaking out from the valve cover which while it may sound serious is likely just a gasket that needs replacing ($20 or so in parts). Can someone describe it? I think I will try to find a bottle of coolant and smell it. TrailBlazer - Antifreeze smell - Just bought a 2006 Trailblazer, & when the heat is on there is an odor of antifreeze coming through the vents. the car toward the back of the car but regardless, I'm certain that the smell in my car is not a burning or melting sticker, it's coolant. Checking up on your coolant is easy to forget, but an engine’s coolant is just as important as oil when it comes to your car. Coolant does raises the boiling point of the cooling system in. If you can do the work yourself, a heater core can be replaced for $50 or less. The smell was like cumin and garlic mixed together. If the heater core of your vehicle is leaking antifreeze, that can cause a fairly intense smell inside your car. Hot coolant from the engine flows through there and transfers heat to the. This component circulates warm air inside the passenger cabin. Best Answer: have your heater core checked out, also check your floorboard on your front passenger side to see if its wet or damp. The burning smell can come from either a blower motor that overheated or a mechanical failure of some sort. if not the heater core has most likey sprung a leak and will need to be replaced. One way to know for sure is observe your windows. Now, at the heater core, there is a coolant that might simply start leaking and reaching the heating system or air-conditioning system, which causes that car smells like burning rubber. coming from the rear of the car. Check the coolant overflow bottle. The next step is to find out where the water has escaped from - leaking hose, leaking heater matrix (should smell inside cabin if so) Leaking filler cap,. Unfortunately, this idicates that the heater core, which is similar to a radiator, will have to be replaced. How to Check and Change Your Antifreeze/Coolant Do you even know why you put Antifreeze/Coolant into your car's radiator? The engine of a car produces high levels of heat when it is running and the fluids flowing through the radiator system help to draw some of the heat away from the engine so it doesn't over heat and in colder weather it. Antifreeze has a sweet smell like pancake or maple syrup. If you use an additive to try and stop the leak it might do it but it hasn't fixed the problem. Turn on city water or pump one last time. We had been topping off the coolant in his car for along time, and were having difficulty finding the leak. 3 powerstroke w/ around 70000 on it. The Heater Core. i would recommend taking the bottle out, cleaning it, filling it with water and let it sit overnight on dry newspaper to see if there is anyleak. the car toward the back of the car but regardless, I'm certain that the smell in my car is not a burning or melting sticker, it's coolant. Heater cores are responsible for circulating heat inside. I've got a new heater core sitting on the shelf waiting to go in when I get time but since the car is only used for local or work commute when I'm home I haven't been in a hurry. tthere is a antifreeze/coolant smell in my car, unable to get rid of it. It's not overheating, and once it sits and cools down a bit, the smell goes away. It only smells like antifreeze burning when I have driven the car.