fuel tank sending unit leak

Anyone else have trouble getting the sending unit to seal after replacement??? I got one off of ebay and the new nut was crappy compared to my old rusty one, so I changed it over and things were fine for the first couple of days, but after 50 miles my gage was dropping to fast and sure enough I had seepage problems. I ended up reusing the old gasket and old nut along with the new gasket to get the leak stopped. So if you get a new don't throw anything away for a couple of days, you might need some of it.

i had basically the same problem - thought i had posted this before - however not in here - https://vintage-vans.forumotion.com/between-the-seats-a-f16/fuel-sender-leak-t1769.htm - we had some info in the parts for sale section for the senders but i dont see the post anymore ?! - anyways yes the nut didnt have large enough ridge to press against the tank flange - i also used the old one but only had to use one gasket - did find i had to have at least 5 gallons of gas before it came close to e - annoying but i changed mine because of leak in metal tube of sender - and didnt have to drop tank to change sender - although as long as you are servicing that area if you have not already done so, change all hoses for tank - supply, vent, intake - oo3

Glad to hear I'm not the only one that has had a problem with these. I guess it can be related to the production of crap parts from outside of the US and CAN.