I have a 75' that I want to redo the fuel tank on. I have the sending unit out. The bladder seems to be streched at the mouth of the opening where the sending unit attaches. I do not see one listed in the catalogs for sale. Can they be reused? The screw holes and the leading edge are torn/rotten, and are very soft and streched. What are my options, and requirements? The inside of bladder is dirty. Needs to be cleaned. Lots of silt. What to do? THANKS! External of tank is very good.

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You will more than likley not find a replacment bladder for your tank. Because of the saftey issues that could arrise by modifying your present tank I would suggest replacing your excisting tank with a new aftermarket replacment. Just my 2 cents worth.

|UPDATED|3/26/2016 12:37:24 PM (AZT)|/UPDATED|

I was able to reuse mine as it was in pretty decent shape can't say i have ever seen a bladder for sale, It would be hell to put it in the tank.

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Mark, I've also never seen a replacement bladder for sale and I don't think there's much in the market for a good used '75 tank. If the top end of the bladder is that bad you may have to go with a new tank w/o a bladder. I've used several new tanks manufactured by Quanta, they have always fit well and functioned properly. Good luck !!

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John Sigmund

You can normally remove the bladder, cut the top "seal" area off, and reuse it to seal the sending unit back to the bladderless tank. However..if the top of your bladder, where it seals, is damaged, obviously you can't re-use it. You can use a cork material to make your own gasket, or use some rubber sheeting to make a gasket. Either way, you shouldn't have to purchase a new tank, if your innerds are in good condition.

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

I replaced my tank with a tank that Eckler offers. It has a welded in nut ring that eliminates the bladder and I am happy with the results. This tank is a full 17 gallon tank. I could not find anyone that offers a tank with the nut ring welded in. So be cautious there are replacements, make sure there is a nut ring.

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I have removed the bladder on our 75's. As mentioned I cut the top off and reused it as a gasket and it was fine. The earlier vettes didn't have a bladder. It was a safety feature of the day although in reality if you get rear ended it's not going to make much difference. Debatable I guess.

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You can cut the top part/ring of the bladder off and re-use it, since it's usually the bladder itself that is damaged/deformed.



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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"