Wiktionary(0.00 / 0 votes)Rate this definition: 1  smudge(Noun) A blemish; a smear. 2  smudge(Noun) Dense smoke, such as that used for fumigation. 3  smudge(Verb) To obscure by blurring; to smear. 4  smudge(Verb) To soil or smear with dirt. 5  smudge.
This smell might mean that your coolant is leaking from somewhere like a radiator or heater hose. This kind of a problem means it's a good idea to take your car into a professional. 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.
However if you're stuck and don't have any coolant, you might want to know how to how to put water in your car radiator. Here's how to do it: 1  Pay attention to the icon on your car's dashboard that indicates if the engine is overheating or if you're car's low on coolant.2  If the light comes on and stays on, it means you're low on engine coolant [source: pontiac 3  ]. A car radiator cannot work if there isn't enough coolant inside the system.ere's how to do it: 1  Pay attention to the icon on your car's dashboard that indicates if the engine is overheating or if you're car's low on coolant. 2  If the light comes on and stays on, it means you're low on engine coolant [source: pontiac ].