My wife has a 2001 Accord. When she first starts it up, the engine is noisy. (I compare it to the noise the valves in my dad's old Chevy used to make) Once the engine warms up, it is fine. The car has been doing this for a couple of years. It gets regular service at the Honda Dealership. Should we be leaving this overnite at the dealership and having them listen to it or is it normal for this Honda? I don't remember anything like this with her 1992 Accord.