So I just took my 00' e39 540i in to replace a clutch hose, coolant temp sensor, and to get the valve cover gaskets replaced. Once the mech finished up he started the car in front of me. It was fine for the first few minutes but shortly afterwards, a tapping noise was coming from the engine compartment, which was not present before I brought the car in. This was something they noticed earlier that day but, for some reason, didn't tell me about it. When I questioned them, they were uncertain of what the noise was. Now, after they re-did their valve cover job, it's still there. Does anyone have a clue as to what this could be? or how bad it is to drive the car with such a noise.
Last edited by MLF540i; 02-06-2009 at 12:54 PM.