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Draining the Fuel Filter Water Trap - 6.7L Diesel
You should drain water from the module assembly whenever the warning light comes on and the message center directs you to drain the water separator. This will occur when approximately
8.45 fl oz (250 ml) of water accumulates in the module. If you allow the water level to exceed this level, the water may pass through to the engine and may cause fuel injection equipment damage.
Your vehicle is equipped with a diesel fuel conditioner module located on the frame-rail under the driver-side floorboard near the transmission.
You should drain water from the module assembly whenever the warning light comes on and the message center directs you to drain the water separator. This will occur when approximately
8.45 fl oz (250 ml) of water accumulates in the module. If you allow the water level to exceed this level, the water may pass through to the engine and may cause fuel injection equipment damage.Draining the Diesel Fuel Conditioner Module (DFCM)
WARNING:
Do not drain the water-in-fuel separator while the engine is running. Failure to follow this warning may result in fire, serious injury, death or property damage. |
Note:
If you drain the diesel fuel conditioner module while the system is running air will enter into the fuel system. The engine will not operate properly if air enters the system.
Note:
With fuel tank levels above 3⁄4 tank it may be necessary to loosen the bowl three turns before opening the drain. This will actuate an anti-siphon valve at the fuel and water separator inlet and prevent the fuel from siphoning out of the tank.
Note:
A loose drain valve can allow air to enter the fuel system and cause drivetrain issues. The engine will not operate properly. Be sure that you fully tighten the drain valve.
- Stop your vehicle and shut off the engine.
- Locate the diesel fuel conditioner module and place an appropriate container under the drain port.
- Rotate the drain counterclockwise until the O-ring is visible. Allow the diesel fuel conditioner module to drain for approximately 25 seconds or until clean fuel is observed. Rotate the drain clockwise to tighten it. If no liquid drains, there may be a clog in the drain. Have the conditioner module serviced by an authorized dealer.
- Make sure that you fully tighten the drain valve and then remove the container from under your vehicle.
- Restart the engine. If the Water in Fuel Drain Filte message and light continues to illuminate, have the fuel system checked and repaired.
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