Car Smells Like Antifreeze When Heater Is On

AC Vent Smells and What They Mean When you turn on your air conditioner for the first time, you expect to be greeted by nice, cool air. And we plan on pointing you in the right direction by discussing all the relevant topics associated with these products. The water and oil look good could it still be the head gasket. Permanent bypass keeps antifreeze out of your RV's water heater during winterization. I have been getting a coolant or antifreeze smell in my 2007 Nitro SLT with 37,000 mi. This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. But, the thermostat in a car is not like the thermostat in a house’s AC/Heater system. I know if you smell antifreeze when you turn on the heater that is a bad thing. What most people don’t know is that a car’s heater core is also responsible for circulating warm air in a vehicles passenger cabin. Any insight appreciated. 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. Is my car spewing something bad into the cabin causing the windows to fog up?. It does look like the upper seal on the radiator itself may be leaking, I found remittance of coolant still up around it and cleaned it off. 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. The car is out of warranty. Coolant and heat-transfer agent. Another common fluid to drip from your car is good ol’ engine oil. Do your windows fog up really easily with the heater on? That is a definate sign of faulty heater core. 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 it is the same color as the antifreeze, your heater is leaking. There is NO residue on the windshield or windows, and no leaking antifreeze through the floor heating vents. If the heater core of your vehicle is leaking antifreeze, that can cause a fairly intense smell inside your car. There’s generally an adjustable valve that controls how quickly the coolant flows through. If your car leaks oil in drips while your car is parked and leaves a puddle on your garage’s floor, take it into a mechanic and get it fixed ASAP. It takes about a week for the reserve to empty so it's a slow leak. It does look like the upper seal on the radiator itself may be leaking, I found remittance of coolant still up around it and cleaned it off. It's scary to drive like this. This car has a definate odor when the AC, or the heat, is turned on, not every time though. It will take some time to fill a car heater core to this point, but if there is no place for the heat to dissipate because it is blocked by leaves and other debris, then there is a very good chance one would find a burning smell from a dirty car heater core. I had one in my car that developed a very slow leak along the bottom seam. However, if the air coming from your AC vent is smelly, you might have a serious problem on your hands. Smell of coolant outside of car after running, no visable leak asked by Andrew P on September 02, 2016 Smell coming out of side vents after driving the car, not to sure how to explain the smell def doesnt smell sweet, maybe more like dry rubber? no visible leaks. the vehicle. 8 with 167k. A leak here may form a wet spot on the carpet on the passenger side. Do your windows fog up really easily with the heater on? That is a definate sign of faulty heater core. Antifreeze gets very hot and will start to steam, especially if it's spraying onto a hot engine or running down a hot radiator. com FREE DELIVERY possible on eligible purchases. Whether your heater or A/C smells sickly sweet, simply stale, acrid like burning rubber, or distinctly urine-tinged, all of. Since yesterday I'm getting this musky nasty smell of antifreeze inside the car when the vents are set for circulating the air inside. I had one in my car that developed a very slow leak along the bottom seam. It first smelled like burnt oil but now it's kinda smells like antifreeze. Replacing a broken pipe or hose is often quite simple and fairly inexpensive. 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 car’s thermostat does not regulate the temperature of the coolant specifically for the heater. Oh and sometimes the smokes comes in thru the air vents. It has a slick and oily feel (thinner than engine oil) and smells like petroleum. If you have a Murano under warranty with an antifreeze smell, I'd suggest that you ask the dealer to pressure test the system and look for seepage around the head gaskets. With all traces of RV antifreeze removed, you can reinstall any water filter cartridges that were removed for winter storage. The car now has an issue with the heat, it blows cold until you turn it to cold then warm air comes out for about 10 seconds. Is it the radiator and is this an urgent repair or is it something that can wait a week or two?. Also, have the system inspected, antifreeze is HIGHLY TOXIC so its best to make sure ts not leaking into the car. The fluid has a lightish red color when it’s new and a dark red or brownish color when it is old. 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. The antifreeze level is not low. Most of the time, bad smells that emanate from the vents in your car's air conditioning system are easily corrected without a need for an actual repair. First of all car only gas 106000 miles been driving it for. 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. Vapor comeing out of vents with heater turned off. Includes 3-way bypass valve, backflow preventer, plastic tee, and PTFE tape. More to the point, is the fact that you would. It's not leaving spots, there's no smoke, and the heater works fine, blows very hot. Here are some common bad car smells and their possible causes: because breathing antifreeze isn’t good for you. I got it back today, heat works great! However, I can still smell a very slight scent of antifreeze. When I turn my heat on the car will hover sometimes to around 260 but recently my car has reached 260 so I finished driving home and haven’t driven it since. Is it anything to worry about? I'm assuming the heater core is slightly leaking. These topics will include things like types, using process, top brands, and much more. Camco Accessories and Parts - CAM35983. Turned out to be the heater hose which runs under the intake back to the heater core. Since yesterday I'm getting this musky nasty smell of antifreeze inside the car when the vents are set for circulating the air inside. Before we get into repairing it, let me explain briefly what the heater core (picture) does. But this isn't coolant that's smelling. 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. com Lifewire. Don’t ignore it. Is it anything to worry about? I'm assuming the heater core is slightly leaking. There has not been antifreeze on the floor in my car. I've added some follow up questions that are specific to my situation but for the main que. Check the hoses first, but thanks to their being sheltered from the elements, hose failure at the heater core is probably less common than the core itself developing a leak. 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 intoxicating smells). The interesting thing about how this all began is that I gave my car for a little test drive to a friend who normally drives like crazy. I check the hoses and find one looks like it might be dripping. The major use of ethylene glycol is as a medium for convective heat transfer in, for example, automobiles and liquid-cooled computers. I will be taking it back to. G37 losing coolant. Hi Austin, my car is a 2002 Pontiac Sunfire. We explain what it is and why it’s essential to the good health of your car’s engine. But the engine smells like burning antifreeze if I use the heat but there is no overheating or leakage of antifreeze…. When I drove the car everything seemed allright, but when he gave me the key and I got into the car, the engine coolant was so hot that it would probably have bent the water indicator needle in my dashboard. What happens if I drive without antifreeze in my car (no water / no antifreeze)? This is my main question. My husband knows this. I've added some follow up questions that are specific to my situation but for the main que. That a lot of people have same problem as well. Check all of the heater hoses under the hood. 8 with 167k. : Automotive - Amazon. ⬇️Things used in this video: 1. 9d van and have noticed that when i first put the blower on there is a very strong curry sort of smell i have googled the problem and it says that the heater matrix has gone. Just find the coolant inlet and outlet hoses that go in and out of your car's firewall. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. Hope it is not the heater radiator leaking. An antifreeze smell from a furnace sounds like trouble, but it is not necessarily a problem. I have been getting a coolant or antifreeze smell in my 2007 Nitro SLT with 37,000 mi. Is my car spewing something bad into the cabin causing the windows to fog up?. This usually means the engine has an oil leak, and oil is dripping onto a hot exhaust manifold or exhaust pipe. 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. It has a slick and oily feel (thinner than engine oil) and smells like petroleum. If you faintly smell a coolant type smell, or like a burning engine fluid type smell, then you have another heater core problem. Excess engine heat is absorbed by coolant, a mixture of water and antifreeze. 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. This car has a definate odor when the AC, or the heat, is turned on, not every time though. If the temperature gauge shows “cold” even though the car has been running 5 minutes or more, it is possible the t-stat is stuck open. Unless by coolant you mean engine coolant. We explain what it is and why it’s essential to the good health of your car’s 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. Since yesterday I'm getting this musky nasty smell of antifreeze inside the car when the vents are set for circulating the air inside. Is it anything to worry about? I'm assuming the heater core is slightly leaking. Antifreeze gets very hot and will start to steam, especially if it's spraying onto a hot engine or running down a hot radiator. Had dodge dealer look at. Difficulty:EasyInstructions 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. 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. It smells strong and distinct: if you’ve smelled it before, you know what we’re talking about. The heater core works in conjunction with your engine’s cooling system. An oil leak can adversely affect oil levels in your car, and if left unchecked, can cause engine damage. The interesting thing about how this all began is that I gave my car for a little test drive to a friend who normally drives like crazy. 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. 8 literI'm thinking my heater core has a hole in it for sure. Chances are that it happens due to an internal or external coolant leakage or a leak in the radiator cap. It's coming from your car. he found crack in thermostat housing replaced but i still have problem. Scotty Kilmer, a veteran mechanic with 46 years of experience and cult following on YouTube, explains how to diagnose car smells -- gasoline, coolant, oil and more. Getting antifreeze smell in cab, no sign of leak on floorboards but loosing small amount of antifreeze can't find out where. 2013 Chevy Cruze, I have an awful order which smells like antifreeze coming from from the vents mostly when the heat or A/C is. Auto Diagnosis - What's That Smell? Remember that new-car smell? Actually, new cars haven't had that smell since manufacturers took the solvents out of the glues in the interior in an attempt to. I check the hoses and find one looks like it might be dripping. Outside the car, the usual suspects include a radiator or heater hose, an intake manifold gasket or cylinder head. Did some investigation and thought it could be the heater core but the passenger floor is dry and the smell isn't consistent. The reasoning is that when you smell something sweet from your dash vents, the usual culprit is a leaking 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. Editor's Note: This article was originally posted in 2009. I filled up the antifreeze and it dropped maybe one-half inch. There is NO residue on the windshield or windows, and no leaking antifreeze through the floor heating vents. And, depending on the car (and how hard it is to get at the heater core), that'll cost you between $100 and many hundreds of dollars. Yesterday I had spent some time sitting in my car with the AC running both while on my break and when I got off work. If you only smell it when the heater is on and calling for heat, I'd say heater core. ⬇️Things used in this video: 1. It smells like coolant after it warms up to temp. It's not overheating, and once it sits and cools down a bit, the smell goes away. An antifreeze smell from a furnace sounds like trouble, but it is not necessarily a problem. 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. It takes about a week for the reserve to empty so it's a slow leak. Almost smells like it has some antifreeze in it, but I can't believe there would be a problem with the heater core on a brand new car. If the water heater wasn’t bypassed, the antifreeze needs to be drained from the water heater tank and collected in a bucket or other container. It smells like coolant. Electrical Short. Smell of coolant outside of car after running, no visable leak asked by Andrew P on September 02, 2016 Smell coming out of side vents after driving the car, not to sure how to explain the smell def doesnt smell sweet, maybe more like dry rubber? no visible leaks. 8 with 167k. It's possible someone spilled some on the engine and it's burning off. I don't have this issue, but when I walk into the garage after my wife turns off the van I get a whiff of what smells like antifreeze. I have a 2002 Ford Taurus that I bought used to get my husband to and from cancer treatment so 140 miles 2 times a week. Transmission fluid leaks occur near the front or middle of the car, right beneath the transmission. This usually means the engine has an oil leak, and oil is dripping onto a hot exhaust manifold or exhaust pipe. Then, it delivers that same heat to your tootsies when you turn on the heater. In fact, some. But, the thermostat in a car is not like the thermostat in a house’s AC/Heater system. Today I go out to my car and the driver floorboard is soaking wet. @JFjeld did this write-up on how to replace the heater core. For instance, you might have antifreeze leaking and it burning off smells like plastic. Car emission smell through air vents, only when using heat and not on recycle. If there's a leak in the heater core, you'll likely notice the smell of antifreeze inside your vehicle. 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. The stat was changed at the same time with new antifreeze. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. The slipping belt smell can be drawn in from the engine compartment into the passenger cabin. It’s probably what it smells like. The car’s thermostat does not regulate the temperature of the coolant specifically for the heater. Antifreeze smell and vapor coming through vents - 1996 Jeep. This doesn't look like a fun job no matter the make or model!!. Only in an emergency should you add only water to the coolant system. Those feed the. Why do you want antifreeze, are you going to turn off the system, antifreeze will lower the efficiency of your system, just as in your car 50-50 is recommended not 100% antifreeze, water transfers heat more efficiently. There are several issues that may cause car smells from the heater core. If you faintly smell a coolant type smell, or like a burning engine fluid type smell, then you have another heater core problem. Hi all, Have a 2001 2500 4x4 Cummins. I don't have this issue, but when I walk into the garage after my wife turns off the van I get a whiff of what smells like antifreeze. Depends on the smell. Finding out what is wrong with your car by feel, smell, look, and sound. he could not find any other leaks at that time. I installed a new radiator 2 years ago. Whether your heater or A/C smells sickly sweet, simply stale, acrid like burning rubber, or distinctly urine-tinged, all of. It smells like syrup: This could mean a coolant leak. But the car isn't overheating. My 2000 Lincoln town car blowes white smoke and smells like antifreeze what can it be 3 Answers. Getting antifreeze smell in cab, no sign of leak on floorboards but loosing small amount of antifreeze can't find out where. My mom's nissan Altima was like that we kept looking and looking finally found it - bad weld on a line in the radiator it was weeping fluid - took it in and they replaced the radiator had about 500 miles on it at the time no issues after that. com FREE DELIVERY possible on eligible purchases. , Antifreeze-Sweet/Offensive Odor, Heater On, Engine Compartment. An antifreeze smell from a furnace sounds like trouble, but it is not necessarily a problem. It smells strong and distinct: if you’ve smelled it before, you know what we’re talking about. It's done this since I bought it a little over a year ago. It will take some time to fill a car heater core to this point, but if there is no place for the heat to dissipate because it is blocked by leaves and other debris, then there is a very good chance one would find a burning smell from a dirty car heater core. What Does A Heater Core Do? The heater core is a component of the Cooling System. Antifreeze is used in plumbing and furnace systems just as it is used in cars. Difficulty:EasyInstructions 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. Most people still complain about a smell after they have their heater core replaced, this is from the coolant that soaked into the carpet and now smells nasty. Is it anything to worry about? I'm assuming the heater core is slightly leaking. I will be taking it back to. It contains ethylene glycol which can give off a sweet scent. Check all of the heater hoses under the hood. Almost smells like it has some antifreeze in it, but I can't believe there would be a problem with the heater core on a brand new car. In fact, some. Antifreeze can smell like fish, and it CAN leak into the car through the heating system. And, yes, use only an AC/Delco 15 psi radiator cap recommended for your car. antifreeze smell in cabin - Toyota Nation Forum : Toyota Car and Truck Forums. 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. TOM: But I like your friend's solution. VROOM VROOM! What would life be without cars? Before the late 1800s, most people were settling for transportation by horse or maybe even a bike. Electrical Short. Difficulty:EasyInstructions 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. Is this normal? The vent cleaning service person said that it would smell like something burning. Check all of the heater hoses under the hood. Transmission fluid leaks occur near the front or middle of the car, right beneath the transmission. That a lot of people have same problem as well. Some vehicles in particular seem to have been more problematic over the years—like the 2009 Ford Focus. Ive got a 2002 cadillac deville base im gonna try to give as much detail as possible here. This kind of a problem means it's a good idea to take your car into a professional. Car is under 4k miles and the heater core went in my ST, I had it replaced under warranty. 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. Permanent bypass keeps antifreeze out of your RV's water heater during winterization. Hi i have a 97 with a 4. Sounds like you have a small leak in the heater core. Car emission smell through air vents, only when using heat and not on recycle. When the heater core develops a leak, it begins …. Well 5 days ago, the heater started smelling like antifreeze. TOM: But I like your friend's solution. com offers. What most people don’t know is that a car’s heater core is also responsible for circulating warm air in a vehicles passenger cabin. The dryer smells so bad we don't want to use it. Most people still complain about a smell after they have their heater core replaced, this is from the coolant that soaked into the carpet and now smells nasty. 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. Leaking coolant can be attributed to a damaged heater core, radiator, heater hose, or cooling system. 2003 Ram 1500 Losing Antifreeze With No Signs of Leak Sold commonly to used car lots. 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. Look carefully at clamped connections. I'm going to check the coolant tank and oil level when the truck cools down a bit more. The dealer can't see any visible leaks and I'm not getting the window fogging which would indicate a heater core leak. I feel for you, the heater in your car (like the air conditioner) is a wonderful comfort item, and it can be very costly to repair if and when it fails. Coolant and heat-transfer agent. The major use of ethylene glycol is as a medium for convective heat transfer in, for example, automobiles and liquid-cooled computers. antifreeze smell in cabin - Toyota Nation Forum : Toyota Car and Truck Forums. I'll probably get the car back Thursday or Friday. The heater core is responsible for circulating warm air in the car’s passenger cabin. When you clean the windshield with windex, it just moves the film around and smears it. How Would You Diagnose a Car That Smells Like Antifreeze? A sweet-smelling aroma and antifreeze smell could indicate that the car's heater core is leaking. Is this normal? The vent cleaning service person said that it would smell like something burning. Problems with the Heater Core. My equinox also fogs up and I am unable to defrost it, the dealer did an pressure testing, said everything looks good, cannot diagnose any problem. The Main Causes of Car Smells Like Antifreeze but Not Overheating. : Automotive - Amazon. I'm smelling antifreeze. Heat still smells like antifreeze when new heater core installed?? I got a new heartcore done and the machnics told me that it will still smell for a bit when heat is on high, is that common?? Also, he said something like my glow plug heater needs replacing?. 2001 dodge ram 1500 v8. 100% propylene glycol is a somewhat better absorber of heat, and in some cases is useful as a coolant. I noticed this morning while driving that when my AC is on, it smells like coolant in the cabin of the vehicle. 6L, and others I'm sure, have this problem that is kind of hard to track down. If your car leaks oil in drips while your car is parked and leaves a puddle on your garage’s floor, take it into a mechanic and get it fixed ASAP. Antifreeze can smell like fish, and it CAN leak into the car through the heating system. Antifreeze flows through the engine and removes excess heat so that you don't have an engine meltdown. I check the hoses and find one looks like it might be dripping. Are you getting the smell of antifreeze from air vents? Does it seem stronger when the heat is on? If so, any thoughts about the odor coming from the heater core are well founded. Coolant and heat-transfer agent. Difficulty:EasyInstructions 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. It doesn't look like I'm losing any coolant. The slipping belt smell can be drawn in from the engine compartment into the passenger cabin. Is Antifreeze, like Aspirin, "Hype"? Somethings on Turbobricks and SAABnet you hear members touting the advantages of a certain brand Antifreeze that really lower engine temperature, but if you really think about it, engine temperature heat release is controlled by thermodynamics and not what the intracacies of the cooling fluid are. Coolant or antifreeze is one of the most important fluids in your car. Apparently they have to drop the motor out to change out the head gaskets. I had the dealer look into this and cannot find any leaking. 2013 Chevy Cruze, I have an awful order which smells like antifreeze coming from from the vents mostly when the heat or A/C is. What could be causing this? I've never noticed it before so it seems a bit strange. I got it back today, heat works great! However, I can still smell a very slight scent of antifreeze. It has a slick and oily feel (thinner than engine oil) and smells like petroleum. What Does A Heater Core Do? The heater core is a component of the Cooling System. I have a 2003 PT that I got at the beginning of the year and now every once and a while I smell antifreeze when I turn on the heater. When the heater core develops a leak, it begins …. No smell of antifreeze in the car at all, the floors are dry and no extra moisture when using the. Furthermore, it seems that this type of complaint comes primarily from owners of late model cars and almost always cars with R-134 systems. Those feed the. It's too cold here to work on the car so we're waiting for better weather. Coolant and heat-transfer agent. If the temperature gauge shows “cold” even though the car has been running 5 minutes or more, it is possible the t-stat is stuck open. Permanent bypass keeps antifreeze out of your RV's water heater during winterization. It's done this since I bought it a little over a year ago. if your car pet is wet, remove the trim pieces along the door sill and kick plate and pull it back and dry it with a hair drier or just air dry. Heat still smells like antifreeze when new heater core installed?? I got a new heartcore done and the machnics told me that it will still smell for a bit when heat is on high, is that common?? Also, he said something like my glow plug heater needs replacing?. Could this be residual from when it was leaking antifreeze?. Transmission fluid leaks occur near the front or middle of the car, right beneath the transmission. Then, it delivers that same heat to your tootsies when you turn on the heater. It first smelled like burnt oil but now it's kinda smells like antifreeze. , Antifreeze-Sweet/Offensive Odor, Heater On, Engine Compartment. It's gotten warmer out and now the ac smells horrible. If the water heater wasn’t bypassed, the antifreeze needs to be drained from the water heater tank and collected in a bucket or other container. Antifreeze flows through the engine and removes excess heat so that you don't have an engine meltdown. 6L engineit seems like everytime i turn on the heat now it smells like antifreeze bad, the engine does not overheat and i have not found any leakshelp would be nice on what it could be thank you. That a lot of people have same problem as well. Inside of jeep smells like antifreeze. This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. Basically it is the cam covers leaking oil slightly from the bottom corners nearest the bulkhead, onto the exhaust manifolds. Finding out what is wrong with your car by feel, smell, look, and sound. It smells like syrup: This could mean a coolant leak. Although it is highly unlikely to happen. 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 intoxicating smells). If you notice an odd burn smell when the heat turns on, it may be a sign that your furnace needs maintenance. But all that means nothing if your old car smells like a gas station. Selling the car is. I have searched for an antifreeze leak and have found none. Do your windows fog up really easily with the heater on? That is a definate sign of faulty heater core. Other common issues that plague heating system components include a vacuum leak, heater valve failure, fan motor failure, heater core failure, or stuck thermostat. And then we replaced the radiator, wheee. The stat was changed at the same time with new antifreeze. If your car's AC vents are emitting a bad or strange smell, it does not necessarily mean you need a car air conditioner repair. My jeep liberty has had issues with the heater system in the past. But to be clear, it smells like antifreeze. When I was younger and less wise, I drained the cooling system of my 1973 Ford Country Squire and replaced it with 100% ethylene glycol (antifreeze). If it is the same color as the antifreeze, your heater is leaking. It didn't even work at defrosting my windows inside because I believe the air was so moist from antifreeze. If it only happens when the heater is on, try having the heater core inspected. Buy Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz. The car is spewing white smoke or steam from the front. Antifreeze flows through the engine and removes excess heat so that you don't have an engine meltdown. A heater core or evaporator leak, where the antifreeze is giving a bad odor - though it's usually "sweet" bad, not like animal waste. It's possible someone spilled some on the engine and it's burning off. (how tech-noob am I, right?) But one of the symptoms is foggy windows, making me think it's referring to the heating and air. the heater core "looks" good, and the water pump is apparently new, along with the hoses to and from the radiator. In fact, some. Bleach and water and let it soak for 5-6 hours then flush again. If your car leaks oil in drips while your car is parked and leaves a puddle on your garage’s floor, take it into a mechanic and get it fixed ASAP. Is my car spewing something bad into the cabin causing the windows to fog up?. It doesn't look like I'm losing any coolant. 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. Most modern engines have aluminum cylinder heads, which require the protective anticorrosive properties of antifreeze. People often find plastic bags and other objects stuck in the engine, causing the frustrating issue that car smells like burning plastic. This coolant is then routed through. It's coming from your car. The car is spewing white smoke or steam from the front. What happens if I drive without antifreeze in my car (no water / no antifreeze)? This is my main question. The major use of ethylene glycol is as a medium for convective heat transfer in, for example, automobiles and liquid-cooled computers. It will take some time to fill a car heater core to this point, but if there is no place for the heat to dissipate because it is blocked by leaves and other debris, then there is a very good chance one would find a burning smell from a dirty car heater core. Almost smells like it has some antifreeze in it, but I can't believe there would be a problem with the heater core on a brand new car. It smells like coolant after it warms up to temp. And then we replaced the radiator, wheee. The Main Causes of Car Smells Like Antifreeze but Not Overheating. It contains ethylene glycol which can give off a sweet scent. @JFjeld did this write-up on how to replace the heater core. There isn't a leak that I can find and nothing on the floor the garage out the normal. The reasoning is that when you smell something sweet from your dash vents, the usual culprit is a leaking heater core. 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. There are several issues that may cause car smells from the heater core. The interesting thing about how this all began is that I gave my car for a little test drive to a friend who normally drives like crazy.