All bolts/nuts on the face of the engine have been torqued and the viscous fan clutch and fan have been installed. The wire that you see leading away will go to the controller that adjusts the fan speed based on engine temperature. The fan is always at no less than 30% engagement. When the temp reaches 190 degrees farenheit, the controller will start increasing fan speed until it reaches full engagement at 220 degrees. The thermostats start opening at 180 degrees and are fully open at 230 degrees. There is a separate thermostat for each head.
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