To find out your engine size, check:
* Your vehicle's title or registration: This usually lists the engine displacement (e.g., 3.9L, 4.7L, 5.2L, 5.9L).
* The sticker on your driver's side doorjamb: This often contains engine information.
* The engine bay itself: Look for an engine ID tag directly on the engine.
Once you know the engine size, you can search online (e.g., using Google or a parts website like AutoZone or Advance Auto Parts) for "2000 Dodge Durango [engine size] crankshaft pulley bolt size." This will give you the most accurate information.