dick seiders
Well Known Member
I am in the process of upgrading my fuel tank to the latest frangible bolt mod. (13-12-19 I think). I had completed my 2013 Cond. Insp. just prior so am catching up now. I decided to remove the top skin as someone in the forum suggested some time ago so I wouldn't have to go nuts trying to do the work thru the sending unit door.
After removing the skin I noticed a gray colored coating on the bottom of the tank. I can easily wipe it off, but I am curious as to it's identity. The coating showed fuel trace marking from draining the tank yesterday which suggests the stuff is moving around with the fuel, but it dried as the fuel evaporated after draining tank. Now that it has dried it will stick to your fingers if you rub them on the tank bottom skin and the dried material is very fine powder in appearance. Very interesting. Does this residue burn with the fuel? If so is that a good thing? I guess the answer there is it depends what it's from. Do any of you know what it might be? Has anyone else seen the stuff?
Thanks for any feedback.
note: If there are more out there that have not yet done the upgrade, and you decide to remove the top skin as well be sure to order a new T 1204B flange for the tank. The skin holes are all pre-punched and it's very likely your flange hole pattern will not match up to the top skin. Ask me how I know.
Dick Seiders
After removing the skin I noticed a gray colored coating on the bottom of the tank. I can easily wipe it off, but I am curious as to it's identity. The coating showed fuel trace marking from draining the tank yesterday which suggests the stuff is moving around with the fuel, but it dried as the fuel evaporated after draining tank. Now that it has dried it will stick to your fingers if you rub them on the tank bottom skin and the dried material is very fine powder in appearance. Very interesting. Does this residue burn with the fuel? If so is that a good thing? I guess the answer there is it depends what it's from. Do any of you know what it might be? Has anyone else seen the stuff?
Thanks for any feedback.
note: If there are more out there that have not yet done the upgrade, and you decide to remove the top skin as well be sure to order a new T 1204B flange for the tank. The skin holes are all pre-punched and it's very likely your flange hole pattern will not match up to the top skin. Ask me how I know.
Dick Seiders