Hello All, now how do I replace the engine oil cooler. Do I have to disconnect the air con rad and do I lose all the gas from this. Also does the front bumper have to come off. I do not know for sure if it is the engine oil cooler but looks like it. There is oil all over the viscous fan and front of engine and I have cleaned the bottom of the vehicle 3 times and the oil keeps coming, does not look like the hoses as there is only a small drip from them. Thanks