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There is a little screw on top of the thermostat cover located near the throttle body. Losen the screw and while filling and leave it lose until after you start the car. Make sure it is lose enough to let water flow out of the little hole in the side. After you start the car wait until there is a constant flow of coolent coming out of the hole then tighten gently. Your all done bigpuppy4u@bresnan.net

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Q: How do you purge the coolant in a 1993 Buick Regal?
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