Your bearings and pistons are probably OK, but chain smacking?? You may have in fact lost the drive chain for the oil pump, or the pump let go. Good Luck. It sounds like you will have to at least have the front cover removed, probably the sump as well.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.