Except the obvious, so much water in evap housing that it sloshes into the fan.(That is generally what causes the motorboat sound on right turns.) I haven't seen one doing this that would have the evaporator housing empty by the time you check but I guess its' possible. Make sure the drain is clear or just pull it out. How long does it take before the noise on turns starts up? Depending on humidity, the a/c can create a lot of dehumidifier condensation. Or, the other obvious, how's the coolant level? A bad heater core could also fill up the fan housing but you would probably smell it. Dan at Road Tested Saabs
posted by 68.58....
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