A sweet smell inside the car is worth taking seriously
Most coolant leaks announce themselves outside the vehicle, as drips or a puddle. One kind leaks inside, and it is easy to misread.
The heater in your car is a small radiator behind the dashboard, called the heater core, with hot engine coolant running through it. When it starts to leak, the coolant has nowhere to go but into the cabin, either as vapor through the vents or as damp carpet on the passenger side.
The signs:
- A sweet, syrupy smell inside the vehicle, stronger with the heater on.
- A greasy film on the inside of the windshield that smears when you wipe it.
- Windows that fog quickly and are slow to clear.
- Damp carpet on the front passenger floor with no obvious source.
- Coolant level dropping slowly with no drips under the vehicle.
Any one of those deserves a look. Together they are a strong pointer.
Why not to leave it
Coolant is not something to breathe in for months, and the film it leaves on the glass makes it harder to see, particularly at night and in rain. Meanwhile the engine is slowly losing the fluid that keeps it from overheating.
Topping up hides the problem without fixing it. If you have been adding coolant and cannot find where it is going, the inside of the vehicle is one of the places to look.
Other signs worth booking for
A temperature gauge that climbs in traffic or on a hot day, drips under the front of the vehicle, or steam from under the hood. The national cooling system page covers what to do if the gauge goes into the red.
Fogging that is not coolant is often A/C service, and an overheating problem that turns out to be the engine itself is engine repair. Both are here.
About this store
The Owensboro store runs sixteen services and is managed by Paul Wilson.
See the national cooling system page for all 33 locations.