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foamy in the overflow


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Jim:

You should flush it both ways to really clean things out. You'll need two flushing tees; one at each heater hose. I always use Prestone Super Flush to dissolve any buildup in the rad or heater core.

Once things are flowing freely again, you shouldn't have anything but bright green in your overflow tank. Don't forget to clean out the tank too as part of your coolant flush.

good luck, John

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