I ran the engine with my OBD-II scanner attached. The coolant temp slowly climbed at an idle. Running the heater at full blast and/or increasiing the revs would lower the temp but at idle with no heater running the temp would creep up.
I imagine this is what is happening as I drive. The temp is slowing working its way up. Its as if the main fan is not quite going fast enough to provide the cooling necessary to maintain a steady temperature. This leaves me with a few questions:
1) What temp should the coolant stabilize at? I supsect it is around 220 degrees.
2) Would a failure of the main fan's clutch act like this? Is there anyway to know for sure the clutch has failed?
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