After fixing my o2 sensor problem, my check engine light finnaly turned off...but now the car is heating up way beyond what it did before the o2 fix...also at this time, I removed the underhood noise deadener and the plastic piece that bolts under the car to the radiator I think....its that piece that you know always scrapes (lowered cars) I think it is ment to draw air in to the radiator...but I dont think those two little things would cause the heating...could it have to do with the 02's??? help!!