My heater valve is leaking, so I need to drain the coolant. I had my radiator cored/cleaned and it has been sitting for a number of years. I tried using the drain tap the first time. All I am getting is a slow drip. I was thinking of trying to remove the drain tap and installing a new one. It seems to be on very tight. I am worried about ruining the radiator. Any thoughts or suggestions on how I should proceed?
Kevin
Kevin