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I mean,
I'm gonna get all the coolant off the lines. Air is coming into all of it.
All the coolant I put in after that will go down forcing the air to leave upwards. In the radiator side, it will leave by the expansion tank and the vent valve.
But in the engine headers side, there will be no way for the air to leave.
I'm aware that the coolant from headers goes directly to the cabin heater core, isolated by a shutoff valve that opens when I turn on the heater.
On several cars, you can just disconnect the heater coolant supply hose and let the air from the engine header come out by there.
Can I do that in the S65?
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