Why is my ac drain tube leaking antifreeze?
I'm not sure what your "ac drain tube" is, but it is possible that the coolant is what drained out the night before. This means that the coolant is hot. Hot coolant expands and will overflow if the radiator is full to begin with. Most cars provide a coolant reservoir to capture this overflow - and to which to add coolant. If your car has this reservoir, you should maintain the level for HOT or COLD (do not fill to the top)depending on whether the engine is cold or hot. If the coolant level in the reservoir is between the HOT and COLD marks, (not up to the top) and you're seeing coolant on the ground, you have a leak somehwere. A heater core that is leaking usually shows up INSIDE the car - on the floor for the front passenger - directly below the dashboard; as this is where it is located.
A puddle under the car should give an idea as to where the leak originates. Arrange to park on top of a sheet of cardboard so that any leak will drip onto it. Check it later in the day or the next morning prior to starting and driving off. If dry, reposition the cardboard under the car again, and start the engine and drive off the cardboard. Park and retrieve the cardboard and inspect for wat spots. In either case, if water is found, you can use the cardboard to approximate the location of the leak. Bear in mind that the leak could drip onto a part - and floow the part to a low point before dripping on the cardboard.
Some of the underhood A/C components will drip condensate if they are running in hot, humid conditions. This is normal. Condensate is simply water and is odorless and colorless. Coolant, on the other hand - is slightly thicker than water and is usually yellow-green or pink in color and has a slightly sweet smell. Coolant has lubricating qualities too, so it will be slippery. You will probably not be able to tell the difference between the two by looking at it is on asphalt; but touching it with fingers and looking for color & smell will.
A little coolant on the ground is nothing to worry about. Make sure that the coolant level is not dropping consistantly, and you should be ok. If it is always requiring that you add coolant, it is the sign of a leak somewhere.
Jun 28, 2012 |
Chevrolet Lumina Cars & Trucks