Aren’t all Raptors closed cooling systems that would not require you to warm engine to open the thermostat?
Technically all you should need to do in a Raptor is pull antifreeze until it comes out of the exhaust, you are just filling the raw water HX loop.
Engine needs zero winterization.
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Last edited by larry_arizona; 10-14-2018 at 10:31 AM.
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