Bought some new FelPro o-rings for my ongoing Alero project. The new rings are obviously fatter than the originals, and I can't get the injectors down in their holes with the fatter o-rings fitted. Double and triple checked the auto sites and supposedly I have the correct set for my daughter's machine. Was there a design change for this o-ring at some time or other?
Could this o-ring be the upper one for the fuel rail connection instead (I have not disturbed the injector to rail o-rings and would rather not just to keep from opening yet another can of worms)? If so what the heck are the lower o-rings properly called?