I finally got tired of people telling me that my gas tank was open, "it's just the fuel door, and the spring is broken" I always have to explain. Since I can't afford a new fuel door and mine is broken different than the ones on YouTube. I took a drive to Lowe's, being careful not to spill any gas seeing as the gas cap is perfectly fine. I grabbed a cabinet lock for $5 and change. When I got home I found the largest drill bit I could find, it was a 1/2 inch and the lock required a 3/4 hole. If any of y'all are familiar with Texans then you know you can't stop a true Southern engineer, you might just slow us down a bit. The door is plastic so I used a scharpy and drew a 3/4 inch circle around my 1/2 one I had drilled and used a file to finish out the hole. I slipped the lock in the hole and screwed on the bulkhead nut. I took a paint pen and applied a liberal coat of paint to lock arm and went through the act of engaging the lock, this had the affect of marking the inside of the plastic cavity that the door usually blocked off my gas cap from the outside world. I took out my Dremel with a cutting bit and, using the mark I had made as a starting point, I cut a slot to accommodate the locking arm and filed the edges down so they wouldn't be sharp when I reached in the cavity. I tested the lock and it worked perfectly. Of course when I ran to the gas station I had left the keys at home . All in all it took less time to do than it took me to write this post.


Even looks good

You can still see the paint.

 

there's 09-14 and 15+ fuel door spring for f150 on amz now, just $12

 

2 years late