This is a high-level overview; specific steps may vary depending on the engine (e.g., 3.9L, 4.7L, 5.2L). Always consult a repair manual specific to your Durango's engine for detailed instructions and torque specifications.
General Steps (Highly Simplified):
1. Safety First: Disconnect the battery negative terminal. Work in a well-ventilated area. Wear safety glasses and gloves.
2. Drain the Engine Oil: Completely drain the engine oil using the drain plug located on the oil pan.
3. Remove the Oil Pan: This usually involves removing various components to access it, potentially including:
* Access Panels: Remove any underbody panels or shields obstructing the oil pan.
* Lower Intake Manifold (possibly): Depending on your engine, you may need to partially or fully remove the intake manifold to access the oil pump.
* Exhaust Components (potentially): Some exhaust components might need to be loosened or removed.
* Various Sensors and Wiring: Disconnect various sensors and carefully move wiring harnesses out of the way.
4. Remove the Oil Pump: Once the oil pan is removed, you'll typically find the oil pump attached to the bottom of the engine block. You'll need to:
* Disconnect the oil pump drive: This is often a gear or sprocket connected to the crankshaft.
* Remove bolts securing the oil pump: Carefully remove all bolts holding the oil pump in place.
* Remove the oil pump: The pump itself might be a single unit or comprised of several parts.
5. Install the New Oil Pump: Make sure the new oil pump is compatible with your engine. Carefully install the new oil pump, ensuring it's seated correctly and all bolts are tightened to the manufacturer's specified torque. Replace any gaskets or seals as needed. Reinstall the oil pump drive.
6. Reinstall the Oil Pan: Replace the oil pan gasket (always use a new gasket!), carefully install the oil pan, and tighten the bolts to the correct torque.
7. Reinstall Removed Components: Reinstall all removed components, including the intake manifold (if removed), exhaust components (if removed), sensors, and wiring harnesses, making sure everything is connected correctly.
8. Refill with Oil: Add the correct amount and type of engine oil, as specified in your owner's manual.
9. Check for Leaks: Check for any oil leaks after starting the engine and running it for a short time.
10. Dispose of Used Oil Properly: Take your used oil to a recycling center or auto parts store that accepts used oil for proper disposal.
Crucial Considerations:
* Repair Manual: Obtain a factory service manual or a reputable aftermarket repair manual specific to your 1998 Dodge Durango and its engine. This is essential for detailed instructions, torque specifications, and diagrams.
* Tools: You'll need a variety of tools, including sockets, wrenches, screwdrivers, torque wrench, oil pan gasket scraper, and possibly specialty tools for engine work.
* Cleanliness: Keep the work area exceptionally clean to prevent debris from entering the engine.
* Torque Specifications: Accurate torque specifications are critical to prevent damage. Use a torque wrench and follow the manual precisely.
This is a simplified overview. The actual process is significantly more complex. Again, unless you have extensive experience with engine repair, this is a job best left to a qualified mechanic. Improperly performing this repair can cause serious engine damage.
