How to Replace the Fuel Filter in Dodge RAM 2500

The fuel lines on the Dodge Ram 2500 are designed to withstand the high pressure in the fuel-injection system. Some of the fuel lines are braided and some are rubber. If a line is rubber, it uses special clamps that are designed in such a way that they don’t cut into the casing. When replacing the fuel filter, if you notice a fuel line that needs to be replaced, use new fuel lines. The lines must be marked with EFM/EFI, or else the lines do not meet vehicle-safety specifications.

Jack up the vehicle near the fuel filter using the floor jack. Support the vehicle with jack stands for safety. If the truck is tall enough for you to fit under, you do not need to jack it up. The fuel filter is generally located on the passenger-side frame rail, just in front of the rear tires.

Flush the lines near the fuel filter with water, then, if you have a compressor available, use compressed air to blow the debris off the lines and away from the connectors. If you do not have an air compressor, thoroughly clean the area with a rag.

Open the hood. Open the relay box near the driver’s-side fender well. The diagram located on the inside of the cover tells you which relay is the fuel pump relay. Pull the fuel pump relay out of the box. If you can’t get it out with your fingers, use needle-nose pliers. Crank the engine over three or four times to relieve the fuel pressure in the system. The Dodge will not start.

Fit the fuel line disconnect tool on the fuel line quick connector to disconnect the fuel line from the fuel filter. Repeat for the other side of the fuel filter. Remove the mounting bolt using the appropriate socket. Discard the fuel filter properly.

Wipe the ends of the new filter with a clean rag. Apply a couple drops of engine oil on the tube ends of the filter to ease installation. Note the direction of the arrow on the fuel filter -- the arrow should be pointing toward the front of the vehicle when installed.

Push the fuel filter tubes into the quick connectors. Make sure the spring snaps into position, so that the fuel lines do not come off the fuel filter. Insert the mounting bolt and tighten it loosely. Grab the fuel line and try to pull it out of the filter. If you cannot pull it out, it is properly locked in place. Repeat for the other side of the fuel filter. Tighten the mounting bolt firmly. Lower the vehicle if you jacked it up. Reinstall the fuel pump relay.