Rattling noise in engine-passenger side only

[lmburton]

I went and got my oil changed on Saturday which I’m pretty religious about because my vehicle is older and I commute every day.About 2 days after that, I started getting a rattling sound in the passenger side of my engine almost like when you rattle a spray paint can… When I popped the hood it seemed to be coming from around the alternator area, under it actually. I checked all my fluids, everything was fine and none of my indicator lights have come on, on my dashboard. When I got off of work, I went to start the van and it wouldn’t start. I did start when I pumped the gas pedal which was odd. My vehicle is still under warranty for another month, but curious of what it might be. I’ve parked it for now until I can get into my guys to have it looked at, but obviously the dealership is going to want their guy to look at it.