has anybody replaced it i removed it but i can get it to screw back in i dont know ifthere a trick to it or something. i tried by hand rachet and even impact gun and i cant get it to screw in the old one nor the new one

 

you didn't strip out the threads when you removed the old one did you? Impact gun?

 

its seems its possible that i did strip out the threads what can i do now?

 

Go to NAPA and get a helicoil for the size you need. Not sure if that would hold water or not. Only other thing I could think of is to use a tap and die set to rethread it.