muimui

also, check the filler cap as well, as some time, the new filler cap height is longer than the filler, then the rubber o ring not seal up properly with the filler. if that is the case, use a original nissan filler cap, or modify the new cap will fix the leaking problem.

that is a common problem, only way to fix it , is pull the upper fuel neck out, pull the add on filler off, machine the internal of the original filler then fit the new filler back in by welding. but better get a workshop do it.