How to Change the Oil in a Dodge Cummins Diesel Truck

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Save some money and change the oil on your 2003 Dodge Cummins diesel truck. Except for the larger capacities, the procedure is similar to changing the oil in your car. Follow these steps and complete the job with no oil spots on your driveway.

Things You'll Need

  • 3 gallons of oil
  • Oil filter
  • Drain pan with a 3-gallon capacity
  • 3/8 inch ratchet or breaker bar
  • Oil filter wrench
  • Large flat screwdriver
  • Large piece of cardboard
  • Cleanup rags
  • Operate vehicle and allow engine to reach normal operating temperature. Park vehicle and engage the parking brake. Chock the tires, open the hood and loosen the oil filler cap.

  • Slide the cardboard under the engine. Position the drain pan under the oil pan drain. Wipe any debris from the drain plug area and, using the 3/8 inch drive, remove the oil drain plug. Let the oil drain completely. Wipe off the drain plug area again, then reinstall the drain plug. Torque the drain plug to 37 foot-pounds.

  • Prepare to remove the oil filter by removing the turbo inlet hose/air filter cover. Take the screwdriver and loosen the band clamp at the turbo inlet. Unsnap the clips on the air filter cover and remove the complete assembly. Cover the turbo inlet with a clean rag.

  • Unscrew the oil filter with the wrench. Proceed slowly and lower the filter, keeping the filter upright so there is no oil spillage. Lubricate seal and install the new filter. Reinstall the turbo inlet hose/air filter cover. Remember to remove rag from turbo.

  • Pour new oil into the engine until the dipstick shows about 3/4 full. Start engine and make sure oil pressure rises after a few seconds. Let engine run for a couple of minutes. Shut down engine and let oil drain back into the pan, then check the oil level. Add remaining oil till the dipstick indicates the correct level. Reinstall filler cap.

Tips & Warnings

  • Take old oil to local recycling point or auto parts store for disposal.
  • Removing the turbo hose makes filter removal easier, but is not required.
  • Be careful not to over tighten drain plug or oil filter.
  • Wear safety glasses and use extreme caution when working under vehicles.

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