i have a 2009 dodge durango 4x4 with a 4.7l. brand new motor made it 60 miles down the road and it started knocking. i pulled motor and all spark plugs and as i was turning the motor over by hand it keeps trying to bind up in the same spot ever revolution. If I remember correctly 4 out 16 spark plugs vibrated loose and come out

 

Is there any warranty on your motor? Who installed it?