rattling noise chrysler voyager 2.4

It could be many things, unfortunately and without hearing the noise first hand or being able to do some basic diagnostic tests or be able to drive the car, its hard to say what the source of the noise may be. It could be a failing air conditioning compressor, a bad fan belt idler bearing, a cracked exhaust manifold heat shield or an internal engine problem. Get a professional opinion soon before potentially catastrophic failure occurs.