Well, you're supposed to open the bleeder bolt on the thermostat housing while you fill the system with coolant. It's the little bolt that has a hollow nipple on it. When coolant comes out of it in a steady stream, close it and you're done. That's how it's supposed to work. Mine never has. I usually start the engine and then crack the bleeder and let it geyser for awhile. That's how it does work for me. Good luck.
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