Is it leaking? If so are you sure it's coming from around the gasket. I had a simuliar problem but found out I had a pin hole break right at the base of the pipe coming out from the sending unit. When I was putting the line to the front on I pulled on the pipe to tighten it and caused a leak by breaking the lead loose around the area going into the tank. I also have used superglue on the gasket and line up all of the holes, they have to be perfectly lined up with the holes on the unit. I do this before going under the car with the sending unit. Hope this helps.:anim_25:Tried cork , rubber and neoprene
Flattenned the surface where gasket mates to tank
Used permatex on screws and on gasket
Used copper washers and did not over tighten screws
All have failed
Any suggestions ?
Thanks in advance