Don't have to use Loctite ...BUT I used (sparingly) Loctite (518?) the red stuff recently, when I replaced the valve cover gaskets. hope I don't have to remove then again for another 10 years! :evil: The block sides are now free of oil for the first time in a long while... I'd recommend the stuff.
On a GEMS engine just depress the schrader valve. you'll only loose a teaspoon or so. You can pull your fuel pump relay to make sure some moron wanting to listen to the radio doesn't make a mess of things... like I did. :?
However, by just undoing the rail mounts you should have enough wiggle room to remove the covers without removing the fuel rail.