dumb question: sender gasket

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swing69

fightin' socialism
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On an A body....they replacement fuel sender unit comes with a flat gasket and lockring.

1 person said the correct stack is: gas tank, sender, gasket, lockring.
1 person said the correct stack is: gas tank, gasket, sender, lockring.

who is right?????????????
 
but looking at the sender, it has a tab that seems to index with a notch in the tank opening. If using the big flat rubber gasket; the sender unit "tab" won't engage the tank notch.
......confused.......
 
it should if you twist the sender in the opening.... make sure the end of the line faces up.
 
swing69 said:
but looking at the sender, it has a tab that seems to index with a notch in the tank opening. If using the big flat rubber gasket; the sender unit "tab" won't engage the tank notch.
......confused.......
Click to expand...


Yes it will.....

The gasket is larger than the diameter of the 2 tabs...
 
Been building my own tank using the stock sending unit.

The gasket is bigger then the tabs. The tabs will lock down into the notches in the tank and the seal will go around the tabs and seal up against the tank.

tank... gasket... sending unit... then lock ring.
 
Yep, gasket goes between the tank and the sender. If you have a OEM lock ring, use it.
Many of the aftermarket lock rings are made of thinner material and will cause a leak.
When done right it wont need any sealant and it wont leak.
 
redfish said:
yep, gasket goes between the tank and the sender. If you have a oem lock ring, use it.
Many of the aftermarket lock rings are made of thinner material and will cause a leak.
When done right it wont need any sealant and it wont leak.
Click to expand...

^^^^ this!
 
Just put it together like you want to and when it leaks gas all over the place and your car burns the hell up you'll know you were wrong.


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thanks RRR, you insight, simplistic view of all things mechanical, foresight, insight, hindsight....and of course, current sight are signs of genius. You have bridged the gap from mere mortal, to scholar of the institute of mechanically gifted. we are all in your shadow, and your debt.

If you could find it in your heart to defecate or urinate in our direction, once in a while, we would be so humbly in your debt. really....

I know that you may find this hard to believe, but I do know that the raise boss around the seat of the tank, is taller than the height (thickness) of the sender unit face. If the gasket were to be placed OVER the sender, it is possible to align the ring to keep pressure on the gasket rubber ON the boss and send. NOT having it leak.

That being said, yes, 1 way is like the factory book says. But as I lay in my driveway, trying to stop a drip....I just wanted to be sure and look at both possibilities.

Again, your sageness....I am indebted to you. Geez...the manual... just so happens mine is locked at my shop 30 miles away.
 
If you had the metal for the sending unit against the metal of the gas tank with no gasket between it, logically it would not seal, so mechanically speaking, that doesn't make sense. Still, definitely better to find out the right answer than to guess and have gas all over!
 
swing69 said:
If you could find it in your heart to defecate or urinate in our direction, once in a while, we would be so humbly in your debt. really....
Click to expand...

Now, that would be rude. I'm glad I could help though.
 
After being unable to get 2 different tanks to seal at the sender I said F-bomb it and switched to a fuel cell.
 
RedFish said:
Yep, gasket goes between the tank and the sender. If you have a OEM lock ring, use it.
Many of the aftermarket lock rings are made of thinner material and will cause a leak.
When done right it wont need any sealant and it wont leak.
Click to expand...

The lock riing I got with the Canadian "good" tank was also slightly too small, and slipped through the tangs, also causing a leak.

Use the one from your old tank. It's a MUCH better fit.

...and think about it, tank/gasket/sender, or else...
 
Would you put your valve cover on then the gasket then the bolts?????

You are correct this was a stupid question. But sometimes fitment of after market parts bring up the wonder of flaws in redesign.

Install the gasket . Then the sender then the original ring . Do not use one tab to tighten. Work your way around using all three tabs. You want to keep the ring center and as straight as possible. If you rush th instal it will leak no matter what.

One other thing you may want to do is drill a small hole in the corner edge of the tank outside of the welded seam for a ground wire. The new senders do not ground correctly using the original ground strap.

Not knowing if its the way the new tubes are sealed. but the gas guage always seams to be off using the factory ground strap. Make up your own ground strap soldering the ends.
 
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