If the tank's level is below the minimum mark or it's dry, you've likely got a problem and it is time to consult an expert technician. If the tank is full, what you are smelling is probably not an antifreeze leak. The coolant level should be between the "min" and "max" markings. Most tanks have clear minimum and maximum markings. The coolant-level indicator is on the side of the translucent plastic tank. After the engine fully cools down, check your vehicle's coolant level by observing how much fluid is in your vehicle's coolant-recovery tank. Not finding the leak doesn't mean you don't have one. If that's the case, unless you're great with wrenches see a technician. Heater-core leaks are hard to locate and even harder to fix because the heater is part of the air conditioning system, which is buried behind the instrument panel. If the carpet is damp or the windows seem to fog up easily, the heater core could be leaking. Heaters utilize a small radiator-like "core" to heat the cabin air. If the smell is stronger inside your vehicle than outside of it, the problem could be inside the heater.If you don't see any obvious signs of leakage, scan the entire engine compartment the leak could be coming from somewhere else under the hood. If it looks like a hose is leaking near a clamp, try tightening the clamp with a screwdriver. Look for signs of coolant leakage-a light-colored residue or stain-around the radiator cap, on hoses throughout the engine compartment (check the ends where they are clamped to other components) and on the radiator itself.It's also a good time to literally sniff around to see if you can tell where the antifreeze smell might be coming from. If a small puddle or stain of coolant forms under the car near the front of the vehicle lift the hood and start looking in the engine bay.Note: air conditioning systems often form condensation that can leak on to the ground, but what's dripping from them is pure, clear water. If there is no puddle but you smell the sweet aroma of antifreeze, kneel down and scan the vehicle's underside and see if you can see anything that's wet or covered in droplets. After the car sits for 15 minutes, look under it for a fresh puddle of antifreeze-colored fluid.Most recovery tank caps are marked with a symbol similar to the one shown. The illustration below shows the location of the caps for the radiator and the translucent plastic recovery tank. Do not remove the recovery-tank cap or radiator cap before the engine has adequately cooled. Caution: When the vehicle is fully warmed up, the coolant is boiling hot and under pressure. To find a leak, first drive the car until it's fully warmed up, then park it on a clean, dry section of pavement-a driveway if possible.The car starts running hot or overheating.Engine oil is gold or black (when dirty), and transmission fluid is dark red. Antifreeze makers use those dye colors to differentiate coolant from other fluids used in cars. Puddles under the car of lime-green, orange, pink, or blue-green after you've parked. You might be able to smell it from behind the wheel as well.
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