1. Safety First: Wear safety glasses. Diesel fuel is flammable. Work in a well-ventilated area.
2. Locate the Fuel Filter: The fuel filter housing is usually located near the engine, often on the passenger side (but check your owner's manual for the exact location). It's a cylindrical canister, and you'll likely see fuel lines connected to it.
3. Gather Supplies: You'll need a clean container (a jar or pan) large enough to hold the fuel you'll drain, and some shop towels or rags to clean up any spills. You'll also need a wrench (usually a cap wrench) to remove the filter's drain valve (or the filter itself, depending on your approach).
4. Drain the Water (Method 1: Drain Valve - if equipped): Some 1995 F350s had a small drain valve at the bottom of the fuel filter housing. If present, carefully loosen and turn the valve (clockwise usually tightens). Let the water and a small amount of fuel drain into your container. Tighten the valve securely when finished. This only removes the accumulated water at the bottom.
5. Drain the Water (Method 2: Filter Replacement - More Thorough): This is the more effective method to remove water and contaminants:
* Prepare for Replacement: You'll need a new fuel filter. Have the new filter ready *before* you start draining the old one.
* Loosen the Filter: Carefully loosen the filter housing cap using the correct wrench. Be prepared for some fuel to spill; this is why having the container is so important.
* Remove the Filter: Once the cap is loose, carefully remove the old filter. You may want to use shop towels to catch any remaining fuel.
* Inspect for Water: Observe the bottom of the old filter for any accumulated water.
* Install the New Filter: Carefully lubricate the rubber gasket on the new filter with clean diesel fuel. Install the new filter following manufacturer's instructions.
* Tighten Securely: Tighten the filter housing cap to the manufacturer's specified torque.
6. Clean Up: Wipe up any spilled fuel. Dispose of the used fuel filter properly.
Important Considerations:
* Water in Fuel: Small amounts of water are normal. If you're consistently draining significant amounts, there's likely a problem with your fuel system, possibly a leak allowing water ingress. You should have a mechanic investigate.
* Air in the System: After draining and refilling (if you replaced the filter), you might need to crank the engine for a few seconds to bleed any trapped air from the fuel system.
* Owner's Manual: Always consult your owner's manual for the specific location of the fuel filter and any details about draining it.
If you're uncomfortable performing this task yourself, take your truck to a qualified mechanic. Working on a diesel fuel system requires care and attention to detail.
