How to Remove the Fuel Return Line on a 7.3 Powerstroke
by Gregory CrewsUpdated July 12, 2023Removing the fuel return line in a 7.3-liter Powerstroke engine is a straightforward process. The fuel return line is used to redistribute excess fuel back to the fuel tank. The fuel return hose starts at the fuel filter and can be traced to the valve that combines the fuel lines from both of the fuel tanks. Removing the line will only take a few minutes to complete.
Things You'll Need:
- Flat tip screwdriver
- Rag
- Line wrench kit
1. Ensure the truck is parked on a flat and level surface
Ensure the truck is parked on a flat and level surface. Take the keys out of the ignition.
2. Open the hood for access to the engine compartment
Open the hood for access to the engine compartment. Locate the fuel filter housing bowl. The fuel return line is located at the back of the fuel filter housing.
3. Locate the Schrader valve along the fuel line
Locate the Schrader valve along the fuel line. The Schrader valve will look like an air valve that goes on a tire. It is located just behind the fuel filter bowl. Unscrew the cap on top and press the tab on the top of the valve with a flat tip screwdriver. Keep a rag under the valve to catch any excess fuel. This will depressurize the fuel system.
4. Unscrew the fuel return line with a line wrench
Unscrew the fuel return line with a line wrench. Trace the fuel return line to under the truck. Remove the fuel line from the clips.
5. Unscrew the other end of the fuel return line with a line wrench
Unscrew the other end of the fuel return line with a line wrench. Pull the line down. Take the fuel line away from the truck.
Warning
Use caution working around the fuel system. Diesel fuel is highly toxic if ingested.
Video: 7.3 Powerstroke Fuel Return Hose Replacement
Comments on this video:
- Those 7.3's appear to be a joy to work on compared to my beloved 6.7! Granted, I love having a metric shit-ton of HP and TQ, (400+ & 800+) but I generally leave any repairs outside of Oil changes, to trained professionals that don't have a jacked up back. Keep it up Bro!
- Great video! Super helpful. Doing this on my 1995 F350.
Things You'll Need
- Flat tip screwdriver
- Rag
- Line wrench kit
Warnings
- Use caution working around the fuel system. Diesel fuel is highly toxic if ingested.
Writer Bio
Gregory Crews has been in the film industry for three years and has appeared in more than 38 major motion pictures and 16 television shows. He also writes detailed automotive tutorials. His expertise in the automotive industry has given him the skills to write detailed technical instructional articles.
