Secondary Image5: Insert new secondary fuel filter (small filter in kit) into fuel filter housing (see picture). Slide a new fuel cap O-ring into position just above fuel end cap threads. Re-attach fuel end cap with new O-ring (provided) back onto the filter housing. Torque end cap to 14 Nm using a 15/16 inch socket or 1/2 inch square drive. Warning: Tightening beyond torque specs will crack reusable oil filter cap. Key vehicle On (BUT DO NOT START ENGINE) three times for 30 seconds. This will charge fuel system and move fuel through the pump, the final step in fuel filter change.