Gas tank sender unit gasket

HDowse

HDowse

Senior Member
On a dust off ride on Sunday, my tank gauge read empty with a full tank so on return I removed the sending unit and found the float full of gas. I tested the gauge and it works OK. A new float and gasket are on the way from Joe's but I want to be sure I reinstall the sending unit and gasket back on the tank correctly. My question is should I put the gasket on dry or use a sealer like the gas-resistant Seal All? The sealer makes sense but is there a reason to put it on dry? Thanks for your help.
 
Look at the sealer that says for gasoline. Yellow tube last I bought was from auto zone.
 
The sender unit screw hole spacing is such that it will only install in one position to be sure the float is pointing in the correct direction. Sealant can be used, but be sure it is good for gasoline.
 
I put a new sender in my '40 a couple of years ago when i put in a new gas tank.....used a cork gasket, no sealer......does not leak or seep.
 
I've had mine off several times, the first time I used the cork gasket, after laying around for a couple of days it deformed, I have switched to the rubber one that I believe came from C&G, been opened up several times and put back together with no problems.
 
Easy to make your own gasket cut from the cardboard backing from note pads. Use 2.
 
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My 52 F1 leaked with the rubber gasket. I switched to cork and it still leaked. With gas tank in cab you can imagine the smell.

I took it apart, put Seal-all (recommended here by a fellow Barner) both sides of gasket and no more leak, no more stink:)
 
With all the sealer just be sure the sender ring is still grounded to the tank. The screws should ground it through the sealer, but just be sure it can conduct.
 
19Fordy, good point on the ground to frame. I've got the Seal All. I'll fit it all together tomorrow and run a ground from one of the screws to the frame.
 
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