Fuel tank sendor unit gasket question....anyone use a sealant on it?

Fuel and Air Systems

  1. Cranky

    Cranky Banned Staff Member FBBO Gold Member

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    Somehow the top of the gasket surface got pushed in a bit on this 'new' tank and was installed in the car like that and the guy has been dealing with it leaking at the top of the gasket. I was able to use a pair of channel locks to bring it back out and it looks and feels pretty good but I don't trust it and thought about using some sealer on the new gasket. If that's ok, what would be good?
     
  2. themechanic

    themechanic Oklahoma is OK

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    As I recollect from past threads most problems sealing were due to the new and thinner lock rings and nobody recommend using RTV. Maybe there is a fuel resistant sealer I'm not aware of.
     
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    • dadsbee

      dadsbee FBBO Gold Member FBBO Gold Member

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      I did both the Bird and the Bee and simply coated the gasket with PST592. Mainly as a lubricant, but it's a thread sealer. Absolutely zero leakage or weepage.
      beerestoration2018 166.JPG beerestoration2018 167.JPG beerestoration2018 168.JPG beerestoration2018 169.JPG
      beerestoration2018 180.JPG
       
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      • toolmanmike

        toolmanmike Moderator Staff Member FBBO Gold Member

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        And those aftermarket lock rings are junk. Look for a NOS one.
         
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        • themechanic

          themechanic Oklahoma is OK

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          Somebody posted a thread where they still sell the thicker ones. So, NOS is not necessary in case you don't still have one.
           
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          • dadsbee

            dadsbee FBBO Gold Member FBBO Gold Member

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            Ray had some "NOS" for sale and I bought a couple. They were thicker than the cheap repro's but still not as thick as line OE's. The one I show above was the repro supplied with my pickup/sender (or it came with the Spectra tank.. can't remember). Worked just fine.
             
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            • Cranky

              Cranky Banned Staff Member FBBO Gold Member

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              The original is long gone so it's gonna have to be the aftermarket ring. If the leak is better but still leaking, I'll see about finding an original. And will used some of the thread sealant....
               
            • moparmarks

              moparmarks FBBO Gold Member FBBO Gold Member

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              Or a good used original one. I toss the repros and keep the originals.
              Cranky I have some good used ones if you need one.
              Don't use any silicone as it is not gas tolerant.
              Also there was thick and thinner original rings.
               
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              • 69a100

                69a100 Well-Known Member

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                I have found that using 2 gaskets make a good seal, a little lube between the 2 will help it spin on while compressing the 2 gaskets twisting the ring on. Helps seal with the newer rings a mentioned. Good Luck
                 
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                • moparmarks

                  moparmarks FBBO Gold Member FBBO Gold Member

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                  Don't see how any lube on the gasket would help anything nor as the gasket or unit plate move at all.
                   
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                  • Cranky

                    Cranky Banned Staff Member FBBO Gold Member

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                    I never use RTV with gasoline components....not even it if says gas resistant. I'm also one that uses a MINIMUM of RTV on anything else. It's unreal with some people lol. And how much for an original lock ring? If it leaks again, I may hit you up on one.....
                     
                  • themechanic

                    themechanic Oklahoma is OK

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                  • Cranky

                    Cranky Banned Staff Member FBBO Gold Member

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                    • 69a100

                      69a100 Well-Known Member

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                      Just a little bit!
                       
                    • Stanton

                      Stanton Well-Known Member

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                      There is only ONE place on a Mopar to use RTV - on the four corners of a big block intake gasket. That's IT !!
                       
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                      • Cranky

                        Cranky Banned Staff Member FBBO Gold Member

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                        One other place is if a Dana 60 cover gasket face is smooth or not.....:D
                         
                      • 5wndwcpe

                        5wndwcpe Huge Member FBBO Gold Member

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                      • beanhead

                        beanhead Well-Known Member

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                        Hylomar
                         
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