[PDF] 6 DIT Power Stroke Diesel Engine Fuel Filter Change Guide element into the fuel filter cap. 4b. Slide a new O-ring (provided) into posi-tion above the fuel filter cap threads. 6. Close the water and fuel drain port. This completes the primary fuel filter change. 2. Remove fuel filter cap. Use a 36mm socket 5. Screw the fuel filter cap, with new filter and O-ring, back into housing. Torque to 25 Nm (19 Amazon: ford fuel filter socket wwwon›Search›ford fuel filter socketOil / Fuel Filter Socket for 6 Ford Diesel. STEELMAN 95650 36mm Low Profile Oil Filter Socket. by Steelman. $11 $ 11 97 $17 Prime. FREE Shipping on eligible orders. Only 9 left in stock - order soon. 5 out of 5 stars 4. Product Features 36mm SIZE - 36mm socket fits oil and fuel filter caps on canister type filters.