My dash guage stays at the middle of the "E" after warming up without the radiator fan being connected.After driving today 55* outside temp for 10 miles at 65mph it still didn't go much above the middle of the "E" even after shutting it off.It does go to O when cold and does move to the "E" when warm but no further.I had the head replaced and don't want to have it fail because the guage is faulty.