NC-car-guy Posted September 18, 2023 Share Posted September 18, 2023 (edited) All, I have an issue with my fuel tank leaking around the outlet/pickup. The 57 has the fuel pickup on the bottom. There is a filter with the hose fitting that threads into the tank. My car continues to leak at this point. Is there supposed to be an o-ring or other type of gasket? There appears to currently be none so I tried an o-ring out of the set I have and it doesnt seem to seal. Thoughts? Edited September 20, 2023 by NC-car-guy (see edit history) Link to comment Share on other sites More sharing options...
Smartin Posted September 19, 2023 Share Posted September 19, 2023 I took this picture of Lance’s pickup when I had it out last year….looks like an o ring. 5 Link to comment Share on other sites More sharing options...
NC-car-guy Posted September 20, 2023 Author Share Posted September 20, 2023 20 hours ago, Smartin said: I took this picture of Lance’s pickup when I had it out last year….looks like an o ring. Thats super helpful, thanks! I'll take the pickup with me to the store and find one that fits. 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted September 22, 2023 Share Posted September 22, 2023 also the 1957 service manual lists a torque spec (7- 10 ft. lbs.) when installing strainer with new rubber o'ring (as Adam said) over tightening may break flange loose in tank. Bob 2 Link to comment Share on other sites More sharing options...
NC-car-guy Posted September 22, 2023 Author Share Posted September 22, 2023 9 hours ago, NailheadBob said: also the 1957 service manual lists a torque spec (7- 10 ft. lbs.) when installing strainer with new rubber o'ring (as Adam said) over tightening may break flange loose in tank. Bob good point Link to comment Share on other sites More sharing options...
195354 Posted September 23, 2023 Share Posted September 23, 2023 Check the compatibilty of the O ring, Buna Nitrile should hold up to fuels of today. The vendor should have a compatibility chart that you should check. I have made the mistake thinking an O will work without checking compatibility the seal works for a bit. Steve 2 Link to comment Share on other sites More sharing options...
NC-car-guy Posted October 24, 2023 Author Share Posted October 24, 2023 still haven't found an o-ring that fits right... Link to comment Share on other sites More sharing options...
Smartin Posted October 24, 2023 Share Posted October 24, 2023 (edited) Here come the internet warriors, but have you tried thread sealant in addition to the o-ring? Or using faucet grease on the o-ring? Edited October 24, 2023 by Smartin (see edit history) 1 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted October 25, 2023 Share Posted October 25, 2023 (edited) I looked up the part number #1175175, google showed nothing, but I knew it would be a long shot No size information for the o'ring/seal listed in Buick master parts book Try contacting @Stephenca118 on this forum, last year he did a LOT of repairs on a '57 Century including gas tank, BUT has not been here for awhile and is also on Classic Oldsmobile forum, I will visit on that forum and see if is recently active. here is the link: Bob Edited October 25, 2023 by NailheadBob update (see edit history) 1 1 Link to comment Share on other sites More sharing options...
Stephenca118 Posted October 25, 2023 Share Posted October 25, 2023 Howdy, I saw your note, yes I have not been on here at all, finished the 57 Buick and shipped it back to Monterey about six months ago, never heard back from the owner, oh well. Yes been on the Olds site as I am working on my 62 F85. As far as that outlet on the 57 Century I just used an O ring from my Harbor Freight assortment, and it never leaked as long as I had the car here. I did not tighten it very much, just about 6 to 10 foot pounds. Hope this helps. 2 Link to comment Share on other sites More sharing options...
NC-car-guy Posted October 25, 2023 Author Share Posted October 25, 2023 15 hours ago, Smartin said: Here come the internet warriors, but have you tried thread sealant in addition to the o-ring? Or using faucet grease on the o-ring? The first time I used some fuel tolerant (expensive) gasket maker... no joy. May try other things over the winter.. Link to comment Share on other sites More sharing options...
NC-car-guy Posted October 25, 2023 Author Share Posted October 25, 2023 12 hours ago, Stephenca118 said: Howdy, I saw your note, yes I have not been on here at all, finished the 57 Buick and shipped it back to Monterey about six months ago, never heard back from the owner, oh well. Yes been on the Olds site as I am working on my 62 F85. As far as that outlet on the 57 Century I just used an O ring from my Harbor Freight assortment, and it never leaked as long as I had the car here. I did not tighten it very much, just about 6 to 10 foot pounds. Hope this helps. I'll have to get another assortment and see what I can find in it. 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted October 25, 2023 Share Posted October 25, 2023 14 hours ago, Stephenca118 said: Howdy, I saw your note, yes I have not been on here at all, finished the 57 Buick and shipped it back to Monterey about six months ago, never heard back from the owner, oh well. Yes been on the Olds site as I am working on my 62 F85. As far as that outlet on the 57 Century I just used an O ring from my Harbor Freight assortment, and it never leaked as long as I had the car here. I did not tighten it very much, just about 6 to 10 foot pounds. Hope this helps. Steve, thanks for your quick reply, as always you have great photos with your projects I am sure that may help NC-car-guy, as well as Smartin with his help Any corrosion or rust accumulated on area that o'ring sits on the pick-up/strainer? Bob 1 Link to comment Share on other sites More sharing options...
Stephenca118 Posted October 25, 2023 Share Posted October 25, 2023 If I remember correctly, I slipped the screen off, washed it in hot soapy water, removed the old o ring and gently wire wheeled the area so it was clean and shiney and installed a new o ring from my assortment, I think I coated it with vaseline to help it seal. The car was here for a few months after I had installed the gas tank and it never leaked while here, but I never put more than 5 gallons in it. 1 1 Link to comment Share on other sites More sharing options...
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