Went to go to work this morning and when I started the car I heard a tapping noise coming from the engine bay. My car has a 2.4 in it. Shut the car off and got out and checked all the fluids , everything was full. Drove to work about 15 miles and the car is running perfect no lights on except for the engine light which is on because previous owner changed the exhaust and the catalytic converter pops now. I am off today and going to start to eliminate things one at a time and hope it's not a bearing making the noise. Anyone else have this happen and what did you find out was the problem?