Somehow my buddy broke the head off one os his injector bolts on his 2004 Merc Opti, for his P IV. He is due back From Afghanistan next week, I took it in for him to be serviced, Can the broken bold simply be backed out? The mechanic said its really soft aluminum and he didnt advise it. Just looking for an opinion. I can tell ya I am not letting him near my PII!!!ThanksSteve “Guns” Molina