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First drain the cooling system by opening the drain in the lower part of the radiator and dispose of the used coolant properly. Then follow the uppper rad hose from the rad to the engine. At the engine there is a housing that houses the thermostat. Take it out and stick it back together temporarily. Take the upper rad hose loose at the radiator and stick the garden hose in the radiator. Start the engine and let it run until the water runs clear. Reinstall the thermostat making sure the spring goes toward the engine. Drain all of the water out of the radiator and fill the radiator up with coolant and you should end up with a 50/50 mix in the radiator.

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โˆ™ 2015-07-15 19:16:42
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Q: How do you flush the radiator in a 1993 Pontiac Grand Prix 3.1L V6 Fwd?
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