I just did LIM gaskets and figured I would install new o-rings on the injectors since the car has quite a few miles on it. I got 5 of the injectors completed but on the last one, the fiber washer on the bottom of the injector cracked while installing the new o-ring. Do I need to replace the injector? Does it have to have it or is it just there to keep the o-ring on the bottom? Thanks.