Lock nut question

[Colin Morgan]

Yes, on my car the tank was bolted in tight so there would be no movement - and so no wear.  (There was some felt tape, as mentioned above.)  If you cannot close the gap without stressing the tank, or alter it accordingly, I would suggest you might consider using a piece of solid packing of the right thickness to fill the gap - then there would be no movement where the tank passes through the bulkhead.