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I think scorching should be moved to it's appropriate subtitle, then deleted after a month.
I blocked my lower grille but left the upper open. Mileage is up so that would indicate that my fan is not pulling more energy than I am saving. The Fiesta has no temperature gauge and I have no additional instrumentation other than what Ford installed. Let them flame me, I bought the car. I heard my fan running when I stopped after coming off the Interstate. Takes a little time for the heat generation to slow down after running at 60-65 MPH. Ambient was close to 70 F.
I understand what you are saying and it should be a concern. You want to avoid fan cycling which wastes energy. I want my engine to run as hot as it does in summer. When I hear the fan cycling more, I'll pull one of the pieces of foam pipe insulation out and wrap it around the spare tire.
Lots of smart people here, I enjoy a discussion, to a point.
regards
Mech
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