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Temp guage spike

May 16 2017 at 6:00 AM
Bob  (Login cool67)

I have a fresh SBF crate motor in a project.Dakota Digital dash (It id a direct replacement for all the guages,fuel, temp ,oil, tach, speedo, turn signal etc). All in one panel.Motor broke in fine. Anyway for the first time I had the motor running at an "idle" for awhile and the temp went to about 185 then dropped to about 170 then immediately spiked to 230 plus. The waterpump is new, thermostat new, new alum radiator,no elec.fan just mech.one Actually I replace everything when I restore a car. So where should I start. I was thinking thermostat....try a temporary mech.temp guage to see if it was really that iratic.....electric fan or?

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