Here's a general outline. This is not a complete, step-by-step guide, and you should consult a repair manual specific to your 1989 LeBaron 2.5L for detailed instructions and torque specifications. A factory service manual is highly recommended.
Before You Begin:
* Safety First: Wear safety glasses, gloves, and appropriate clothing. Work in a well-ventilated area.
* Gather Tools and Supplies: You'll need a variety of tools, including sockets, wrenches, a torque wrench, oil pan gasket, oil pump gasket, new oil pump, new oil filter, fresh oil, drain pan, jack stands, and potentially a pry bar or other specialized tools (consult your repair manual).
* Consult a Repair Manual: This is crucial. The steps outlined below are a *general* overview and may not be entirely accurate for your specific vehicle.
General Steps (Consult your repair manual for precise details):
1. Prepare the Vehicle: Raise the vehicle securely using jack stands. Disconnect the negative battery terminal.
2. Drain the Oil: Drain the engine oil into a suitable drain pan.
3. Remove the Oil Pan: This often involves removing various components first, like the front engine cover, oil filter, and possibly the lower radiator hose, depending on the specific access requirements. You’ll need to remove the bolts securing the oil pan. Be careful not to damage the oil pan gasket.
4. Access the Oil Pump: Once the oil pan is removed, you should be able to see the oil pump. There are likely bolts securing it to the engine block.
5. Remove the Oil Pump: Carefully remove the bolts securing the oil pump. Take note of the orientation of the pump before removing it. This is especially critical for identifying the location of the oil pump drive shaft. There may be other components, such as the pickup tube, that are attached to the oil pump.
6. Install the New Oil Pump: Install the new oil pump, ensuring it's properly seated and aligned. Tighten the bolts to the manufacturer's specified torque.
7. Reinstall the Oil Pan: Install a new oil pan gasket and carefully replace the oil pan, tightening the bolts evenly to the manufacturer's specified torque.
8. Reassemble: Reinstall all components removed earlier.
9. Refill with Oil: Add the correct amount and type of engine oil, as specified in your owner's manual.
10. Check for Leaks: Start the engine and carefully check for any oil leaks. Let the engine run for a few minutes and then check the oil level again.
Important Considerations:
* Oil Pump Drive Shaft: Ensure the oil pump drive shaft is properly seated and engaging with the crankshaft.
* Torque Specifications: Use a torque wrench to tighten all bolts to the manufacturer's specifications. Incorrect torque can lead to leaks or component failure.
* Gaskets: Use new gaskets for the oil pan and oil pump to prevent leaks.
* Cleanliness: Keep the work area and components clean to prevent debris from entering the engine.
Disclaimer: This information is for general guidance only. Improper repair can result in serious engine damage. Always consult a repair manual specific to your vehicle before attempting this repair. If you are not comfortable performing this task, it's best to take your vehicle to a qualified mechanic.
