THE CULPRIT: Coolant containing sweet-smelling (but toxic) ethylene glycol is leaking from somewhere. … It might be coming from a leaky radiator cap or the radiator itself, especially if you smell it outside the car. A strong odor inside the passenger compartment probably means a bad heater core.

Can smell antifreeze but no leak?

There are a couple of reasons that you might be able to smell antifreeze inside your vehicle. First, a simple leak could be causing the issue. … If you can’t find a leak in your heater core or a broken pipe or hose, you may need to take your vehicle in to a mechanic and have a professional diagnose the issue for you.

What does it mean when you can smell coolant through my vents? There are several signs of a leaky heater core: First you may notice a sweet smell from your vents. … Coolant/antifreeze leaking out through the heater core means that the overall coolant level in the system will be low and the engine is in danger of overheating – which is the most common cause of mechanical breakdown.

Why do I smell coolant in my house?

You may smell antifreeze if your hydronic heating system develops a leak. … It’s common to add antifreeze to the water circulating through the system to prevent freeze-up in winter, and if you detect that smell, that probably means there’s a leak.

Why does my car smell like it's not overheating?

You likely have a small oil leak on the valve cover, or another place that is leaking on the exhaust. Also, if the smell is sweet, like antifeeze, you may have a small coolant leak as well. Lastly, check smell the wheels to see if the brakes are the source of the smell.

What are the signs of a blown head gasket?

  • White smoke coming from the tailpipe.
  • BUBBLING IN THE RADIATOR AND COOLANT RESERVOIR.
  • unexplained coolant loss with no leaks.
  • Milky white coloration in the oil.
  • Engine overheating.

Why is my car leaking antifreeze but not overheating?

Chances are you have either a radiator cap leak, internal coolant leak or an external coolant leak. … The longer you wait the higher the coolant leak repair cost will be. Learn how to diagnose your antifreeze leak and learn what to do next.

Is it normal to smell coolant after driving?

If you’ve noticed an odd, sweet smell coming from your car after you shut the engine off you might have an antifreeze leak. … Your engine’s radiator is actually filled with what’s called coolant, a 50-50 mix of antifreeze and water.

Can coolant fumes make you sick?

Antifreeze fumes can cause eye and respiratory tract irritation. However, antifreeze shouldn’t be systematically toxic unless physically consumed. Antifreeze can also cause mild skin irritation, though the fumes are far more harmful.

How can you tell if you have a bad heater core?

  1. Fog Inside Your Car. Two things could be going on if you have fog inside your car. …
  2. Sweet Smells in the Car. The sweet smell in your car might not be your perfume or the donuts you’re taking to work. …
  3. Constant Engine Coolant Loss. …
  4. Cold Air in the Cabin. …
  5. Cold Cabin/Hot Engine.

What does freon leak smell like?

A freon leak will produce a smell between sweet and chloroform. Freon leaks can be toxic. If you suspect a freon leak, talk to a specialist who can use a freon leak detector to help address the issue.

What does a freon leak look like?

A tell-tale sign of a refrigerant leak is ice build-up on the copper lines or evaporator coils. When your system lacks the necessary refrigerant to cool your home, the copper lines or evaporator coils can absorb as much heat. As a result, condensation builds up and causes the lines or coils to freeze.

What is the sweet smell in my house?

Homeowners who notice a sweet, pungent odor coming from their basement should inspect the room for mold growth. … Insect infestations are also a common problem in rooms used for storage, such as basements. Heavy infestations of insects can emit a sweet odor that is quite strong.

What does an overheated car smell like?

A sweet smell coming from your engine is probably coolant escaping from the cooling system, which means you probably have a leak. That could wreak havoc on your car, including causing your vehicle to overheat.

Why is my car running hot when sitting still?

A Broken Radiator Fan If your car begins to overheat when idling, but the temperature gauge moves back down once you get going, it’s most likely due to a broken radiator fan. … However, when your car is sitting still, the radiator fan should kick in, keeping the air moving over the radiator to help cool down the coolant.

What are the signs of a bad water pump?

  • Overheating. A dead or dying water pump cannot circulate coolant through your vehicle’s engine and, as such, the engine will overheat. …
  • Coolant Leaks. Coolant leaks from the water pump are common and a clear sign that it’s time to replace the pump. …
  • Corroded Water Pump. …
  • Whining Noises.