searched rockauto.com, OPG, google and eBay -- would a Centurion tank work, @Smartin? the '71-'72 Cadillac looks real close.. https://www.ebay.com/itm/Gas-Tank-for-1971-1972-Cadillac-Fuel-tank/332301674370 1973 here, odd find: https://www.carparts.com/details/Buick/Electra/Liland/Fuel_Tank/1973/LILIGM40I.html
Thanks @Nailhead in a 1967 ! Yes, the IGM40T is a bargain, but that 8.44" filler neck won't do it. https://www.rockauto.com/en/parts/liland+global,IGM40T,fuel+tank,6268 Looks like an additional $222 for that super-long neck on the Olds Ninety-Eight -- tank appears identical. I'm going to measure my '72 Electra filler neck and figure out what to do.
This is a link to a current thread in the "Car Part Out" section regarding a '71 Electra 225 ... the last post includes an offer from a V8Buick member to pick up and bring the part back (where he's from) for free ... check it out: https://www.v8buick.com/index.php?threads/71-electra-225-part-out.372100/
Well, I checked the Parts List and appears the 72 tank is def. different from 73 -- not sure how (EPA? crash rating?) -- and not being reproduced by Liland Global or Spectra. Going to go the etch/seal route -- any recommendations? CARS, Inc. sells a couple bottles of the right stuff.
Regular concrete cleaner cleans the hell out of the tanks but gotta swish some diesel fuel or something around in it afterwards to stop flash rust of the new shiny interior. Sell it at Lowes,Home Depot etc
If you have a radiator repair shop close by, they usually clean and seal gas tanks. I would try to look for someone to do it before trying yourself.
I have used Bill Hirsch gas tank sealer over the last 30 years with great success . I've used it on a 65 Ford truck with lots of rust and many motorcycle tanks. You just have to realize it isn't a day or 2 job .More like a week or 2 . You must be sure the tank is COMPLETELY dry inside before you try to coat it . I have left mine in the sun with me going back and forth to use a hair dryer to blow air thru them . As I said I have let them dry for at least 8-10 days before pouring the sealer in . This is after the cleaning and etching portion of the repair . I had those Re-New shops quote $300- $ 400 for the Ford tank 20 years ago when a New tank was $189 . And Yes I have used a Radiator Shop solder a leaking fitting in my Opel GT tank with great success but finding a radiator repair shop is hard these days . Another lost art !
Posted some pics of the tank -- is it significantly different from '73 Olds tank, which is available new? 72 is not, anywhere. // Confident I'll be able to clean and seal it, thanks all for advice.
Thanks -- I see the big change in the '73 tanks now -- the hole in the top for the sending unit is on a ~1.5" raised portion (more room for evaporation?), vice an entirely flat top of the tank for the '72s. I wonder what changed? EPA or safety?
I see that now that you pointed it out. Maybe I picked the wrong year from rockauto, at least pictures of the tanks are on the site. The other problem is the anti slosh sending units are not available so when you get a rebuild or replacement they are the float arm style. So unfortunately The fuel gauge moves a lot when driving. Gord