I've got a leak where the hardline goes into the top of the injector. Fuel is bubbling out around the hardline on top of the the nut that holds the hardline on the top of the injector. I've pressure tested the line and it does not seem to leak or have any crack in it. My next step was to remove the injector to see what parts I need to order to replace the injector. From my research here it appears that I need the injector and a replacement heat shield. However, upon removing the injector, I've found that there are no heat shields on any of my injectors. The injectors are screwed into the pre-chamber directly. I can see the slotted pre-chamber ring. Sooo, do I need heat shields are not? While we are on the subject, would a failed injector force fuel back and around the taper on the hardline so that it bubbles out where described above?

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