im rebuilding my engine and want to put new cam seals in. i order some new ones awhile ago and am now ready to use them. the problem im worried about is, i remember reading somewhere that the seals with metal in them dont seal as well as the originals. i think i ordered them from rcm. is there any way to use the metal seals i already have or should i just buy the originals? and if i need the originals, where could i get them.