latinobrown

my 2006 scion xb when i start it up it makes a rattling noise like ballbearings rubing against metal its not too loud then when i put it in drive and move it rattles then after i get about a block down the road it stops,what could it be ita coming from the leftside of the engine im thinkin its the pulley goin bad i changed the water pump and alternator and new belts.