Step: Remove the cap.
Step 2: Insert the Diesel Guard, making sure the lugs are hidden.
Step 3: Open lugs out and finger tighten all the sliding bolts.
Step 4: Screw in the bolt closest to the sliding bolt until just tightened.
Step 5: Finger tighten the remaining bolts.
Step 6: Snap off all bolt heads.
Step 7: Replace the cap.