I have a 1992 Toyota Corolla with 130,000 miles on it. I just noticed a small coolant leak coming from under driver's side of radiator. It is a slow drip and I have added more coolant twice in the past two days. The car is not overheating, but I'm afraid it might start to if coolant runs too low. I have an estimate on cost of parts, but what is a typical charge to replace a radiator. If it isn't the radiator, are there any other parts that I should check?