another weird noise

[faction]

in the engine on the passenger's side.kind of a grumbly rumbly sound. opened up the hood and it sounds like something is rattling near a belt in that area.

it is not all the time. at first I thought it was mud or snow caught in the wheelwell, but it was still making the sound even when I was at a complete stop.

anyone else got this? it's going into Nissan on Wednesday and Sure As Sh**, it won't make the noise when I get there.