Drain a little fluid out of radiator(with engine cold),pour in a quart of vinegar in its place,
fire up and warm up on a 30 minute cruise,pull the car in your service area,leave in neutral or park,leave motor running,carefully loosen bottom radiator hose at timing cover,(have gloves on,don't let fan blades hit you),pull hose off and then shut engine off,let drain and cool,repeat,refill with water when cooled,run and drain again,flush and refill with antifreeze,check level when cold,..done.
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