ENGINE OVER $4 GRAND,? I dont know how my car was working fine one moment and now wont run! It just keeps making noises! Is there a manufacturer defect on this engine? its a 3.5 engine, model SXT! I have a friend who has the same magnum, had the same problem and he was still under warranty and had to have the engine replaced TWICE at the dealership before the problem was fixed! What is up with these enginesss!!! HELP!!