It may be the threads or it could be the shut-off valve, I would remove the valve and cap the nipple, that way you can determine if the threads are the source of the leak.


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy