Place the wheel chocks in front of and behind the driver side rear wheel. Depress the parking brake pedal and put your safety glasses on.
Place the jack under the right front frame and jack the Expedition up until you can safely place a jack stand under the frame out of the way of the exhaust and oil pan. Carefully lower the vehicle onto the jack stand. Repeat this on the other side.
Slide the drain pan under the front end and climb under yourself. Use a box wrench to take out the oil drain plug and drain the oil into the drain pan. Spray the oil pan and surrounding areas thoroughly with brake clean to remove any leftover oil residue, once the oil has finished draining.
Use the socket set to unbolt the exhaust from the y-pipe back, take it down and set it aside.
Unbolt and disconnect the starter, using the socket set. Be careful to keep the starter body supported while unbolting it; if you let it hang from one ear, the ear may snap off. Set the starter aside when done.
Loosen all the oil pan bolts with the socket set.
Remove all the oil pan bolts, saving the ones at each corner for last; this will help you control where the pan goes when you remove the last four bolts. When you have them all out, remove the pan and move it out from under the Expedition. If the pan has never been removed and your Expedition has high mileage, you may need to coax it down using the pry bar. Be very careful not to distort the pan or mar the sealing surface on the engine with the pry bar. Clean any residue away from the sealing surface on the engine once the pan is off.
Climb out and remove the old gasket from the oil pan, using a gasket scraper or razor blade to get it completely off if necessary. Once it has been removed, spray the oil pan down with brake clean and wipe away any remaining residue.
Spray a light coating of spray adhesive onto the sealing surface of the oil pan, then carefully lay the new oil pan gasket in place. Slide the oil pan back under the Expedition.
Position the oil pan back under the engine, making sure that the gasket does not slide or move around. Reinstall the four corner bolts first to hold it in place, then install the remaining bolts. Tighten the bolts in a crisscross pattern (just as you would lug nuts on a wheel).
Reinstall the starter and exhaust in the reverse manner in which you removed them.
Replace the oil filter.
Fill the engine back up with the appropriate amount of oil. Start the engine and let it run. Look underneath to make sure you have no leaks. When you have verified that nothing is dripping, shut the engine off and jack the SUV back off the jack stands. Remove the jack stands and set the Expedition back on the ground.
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The oil pump used in the Ford Expedition is a sump pump inserted into the oil pan, which pushes engine oil from the pan into the engine; when the oil pump goes bad in the Ford Expedition you must pull the oil pan off to change it. The oil pump setup also means that replacing the oil filter .
Drive the Expedition onto a set of ramps and secure it using the parking brake.
Place a drain pan under the oil pan and remove the drain plug using a socket. Drain the oil from the pan, then replace the drain plug.
Remove the bolts that secure the oil pan to the bottom of the engine using a socket and ratchet. Place a metal scraper between the pan and the engine to break the seal. Pull the pan free from the engine.
Disconnect the wiring harness from the oil pump.
Loosen the jam nut that secures the oil pump to the oil pickup tube using an adjustable wrench. Thread the oil pump off the pickup tube.
Thread the new oil pump onto the pickup tube and secure it by tightening the jam nut with the wrench.
Reconnect the wiring harness to the oil pump.
Scrape the old gasket material off the bottom of the engine and off the mating surface of the oil pan using a metal scraper.
Place the new gasket onto the oil pan and place the oil pan against the engine.
Thread the bolts into the oil pan and tighten them in an alternating fashion from side to side using the socket and ratchet.
Remove the oil filler cap from the driver's side valve cover, place a funnel into the valve cover and drain 4 qt. of motor oil into the valve cover. Close the cap.
