LaxerFL

About the high pressure injector feed lines: Service bulletin says they HAVE to be replaced anytime they are removed or even if the fittings are just loosened. Does anyone know WHY? I had to replace a lifter and after putting everything back together with NEW feed lines I found out I had damaged an injector so everything came back apart, including the feed lines. They only had like 15 minutes of runtime on them. After replacing the injector I'm now faced with buying new lines for the second time? I don't understand why... What are the risks of reusing the new ones I had on there for like 15 minutes? Is it leaks they are worried about? Since the Service Bulletin mentions replacing them if the fittings are even just loosened it makes me think GM is worried about leaks. Any help would be greatly appreciated!