Small job we did for a customer recently. Fabricated a replacement fuel tank for a 50’s Bentley. Apparently these tanks are really hard to find used and expensive as all get out when/if you can find one in useable shape.
The original was rusted out and had a few leaks. Customer decided to have us make a replacement out of stainless steel and update the fasteners to threads commonly available.
We used common NPT fittings for the drain and pump return but I had to machine a new ring for the level sending unit.
The original sending unit ring is brass and was brazed into a stamped dimple. I was unable to dimple the tank to make the ring flush so when I machined it I turned a relief matching the wall thickness of the tank so after I welded it in the sending unit would sit in the right spot.
The original was also formed from one piece and only had one seam on the end and the ends stamped and edge welded. I ended up having to form this in two halves and weld two seams and outside corner weld the ends. Should be more than ok for this one off. I can’t justify the crazy amount of work it would take to match the original weld joints and the customer didn’t care so we went with what worked easier.
I try not to work on car stuff, but this project isn’t really in the capacity of a typical repair shop. The customer is a family friend so I was willing to bend the rules and take on the project although I try not to do automotive work as a rule.
We used 14ga 304 sheet for the tank body and baffles, and I had a piece of 2-1/2” sanitary tube on the shelf that was perfect for the filler neck.
Turned out pretty nice I think, hopefully it fits well and works like the original.