I'm switching out my rubber hoses for S/S lines. I'm turning the nut and it just won't budge. I did the front with no problem, but the back is stuck on both sides. The nut is almost beginning to strip, and I'm using a flare nut wrench with no luck. What else can I try, I haven't got vise-grips to work either.
Oh yeah, I did a search..nothing comes up.

 

tried some wd40?

 

Try WD40 definitely. If you strip that nut you are IN for a HUGE project. Leave that clip on that the hardline, removing the clip should be the last thing you do.

 

I've tried liquid wrench, and some other thing call Moooov-It with a picture of a cow on the can. I'm going to spray some again tonight, and let it soak until next weekend when I can get back to it and see what happens. Should I use WD40 specifically or would the other two pentrants mentioned work just as well?

 

I twisted some of the hose on my front passenger side trying to get that bolt off. Just make sure you're using a 12mm flare nut wrench, lots of lubricating fluid and I believe you can use pliers on the underside, that's from memory so I'm not definite.

 

You're going to let it sit for a week? At least spray some stuff on there once a day because it'll just dry up otherwise and not do anything.