Question about 2002 Dodge Caravan
Drain the radiator while the coolant is cold. Open the radiator drain plug at the bottom driver side, where bumper meets lower rail, and drain the fluid into a 5-gallon container. If it refuses to open or broke, remove the plastic cover at passenger side and disconnect the lower radiator hose. Do not forget to open the coolant cap, which allows air to enter the radiator core. With all the fluid emptied, refill the radiator tap or with distilled water, leave the cap open, and run the engine until it reaches operating temperature. The goal here is to get the thermostat open, diluting what coolant remains in the engine but the water will start boiling, and burn you out.
Or you can run the engine to get hot but not up to the boiling point. In this case the Flush won't be perfect, but you decrease the danger to burn out. Repeat the drain/refill procedure, until you will get a clear discharge.Repeat the drain and refill procedure two more times with distilled water. The tap water contains chlorine and will corrode the radiator and the cooling system. To fill the radiator, it is recommended to ad 30% volume distilled water to 70% volume concentrated Antifreeze. If you flush the system and rinse with water you must add only 30% water to the antifreeze. There is more water trapped inside the engine compartment, because the thermostat is closed. Make sure to have a coolant density tester. When you finish one of 5 balls must sink, that indicates that you reached 50/50 strength. That means 50% Prestone and 50% Water, which will provide to your car a -34F degree FREEZE-UP Protection , and +265F degree BOILOVER protection. Make sure to open bleeding valve to discharge air pockets from the cooling system. Add coolant.The next day, while engine is cold open the radiator cap, and test the strength of coolant. If it is not quite right, then siphon coolant from the radiator and add antifreeze, or distilled water as necessary. Start the Engine. Untwist the coolant bleeding nipple. If there will be a jet or stream of coolant, that means the water pump is working and is O.K., and there are not air pocket left in the cooling system.
Posted on Nov 06, 2010
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Posted on Jan 02, 2017
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