Anyone have trouble with leaking sending unit gasket?

Posted By: NAS Backyard

Anyone have trouble with leaking sending unit gasket? - 09/08/12 10:03 AM

I have.. Several times. Just installed a new tank, sending unit and gasket. I thought is was leaking out of the vent. but it just kept getting worse. I was hoping the problem would go away with all the new $#!+ I threw at it...NOT! I could actually wiggle the sending unit as installed.Tank is a Spectra. I think the flange material is thinner , but my old tank is an original and it's all tweeked out too. I ended up taking the gasket I made for my old sending unit and installing it and so far, so good. It's made from sandwiching cork between paper and it's a bit thicker than the rubber pos. Man I hope it doesn't leak again. If it does I'll make a thicker gasket.
Well I went and checked it before posting, I did fill it up and it is dry at the gasket but it leaked out the vent pipe a little. So I cracked the cap and it had a little pressure in it. here we go again??????

Posted By: HPMike

Re: Anyone have trouble with leaking sending unit gasket? - 09/08/12 12:32 PM

Quote:

I have.. Several times. Just installed a new tank, sending unit and gasket. I thought is was leaking out of the vent. but it just kept getting worse. I was hoping the problem would go away with all the new $#!+ I threw at it...NOT! I could actually wiggle the sending unit as installed.Tank is a Spectra. I think the flange material is thinner , but my old tank is an original and it's all tweeked out too. I ended up taking the gasket I made for my old sending unit and installing it and so far, so good. It's made from sandwiching cork between paper and it's a bit thicker than the rubber pos. Man I hope it doesn't leak again. If it does I'll make a thicker gasket.
Well I went and checked it before posting, I did fill it up and it is dry at the gasket but it leaked out the vent pipe a little. So I cracked the cap and it had a little pressure in it. here we go again??????

its a common problem with the repop tanks/sending units.. Doubling up the rubber gasket always worked for me. I would be concerned that your paper/cork gasket will fail when exposed to the gas in the tank..

Posted By: dart1962_440

Re: Anyone have trouble with leaking sending unit gasket? - 09/08/12 12:43 PM

I had the same issue before and found that using the original lock ring prevented a leaking sending unit

Posted By: bobs66440

Re: Anyone have trouble with leaking sending unit gasket? - 09/08/12 12:48 PM

Quote:

I had the same issue before and found that using the original lock ring prevented a leaking sending unit

The new rings aren't as good.

Posted By: NAS Backyard

Re: Anyone have trouble with leaking sending unit gasket? - 09/08/12 06:45 PM

Thanks, I am using the original lock ring now and it wasn't leaking this morning when I got up. It went on really tight. I was still a little concerned about how much it was suppose to vent out. That's an odd design. The new rubber gasket I removed last night was really flimsy and wasn't what you would expect from a gasket like that, that's why I went back to the gasket material.

Posted By: bonefish

Re: Anyone have trouble with leaking sending unit gasket? - 09/09/12 01:33 AM

Quote:

Quote:

I had the same issue before and found that using the original lock ring prevented a leaking sending unit

The new rings aren't as good.

same here