Dropping water
Are you loosing water from the inside of the radiator?...then it is a blown head gasket, or a cracked head/block. Is there steam coming out of the exhaust? Is the water dripping from the exhaust pipe and from the small factory hole in the muffler....then it is normal. Most likely, as every car with air conditioning, the evaporator core collects frost even in the summer and the A/C cycles to heat it, and melt it off. It is meant to drip through a small pipe, under the car, onto the ground. It is perfectly clear and clean water. It is normal functioning of the air conditioning. In the winter when the defrost is selected to clear the windshield, the automatic air conditioning produces cold dry air, which is then heated to clear the moisture. Frost collects on the evaporator core. The system cycles to heat it off from time to time and it will drip clear water in the winter when you didn't even know that the air conditioning was on. After all who needs air conditioning in the winter when you did not select it. The automatic system turned it on to dry the re-heated air to clear the moisture from inside the car.
Yep...into the dealership 3 times in the first 2 years. They finally showed me how to check the drain tube, and installed a filter. NOW the a/c fan slows down and speeds up, or doesn't work at all! My first Toyota, and probably my last...
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