06-02-2016, 09:58 PM
This regards a 1998 Buick Riviera, and a 1999 Buick Park Avenue Ultra, both with the supercharged engine. The GM manuals that I have, which were published about 10 years ago, indicate that two different types are o-rings are used on the fuel injectors, A Brown colored ones for one end of the injector, and black colored ones for the other end. It seems that the AC delco o-ring kit for both cars only has one color, black. And Fell pro only has one o-ring kit ES-70599 for injector (same for both cars). So my question is, can the o-rings from your kit ES-70599 be used on both ends of the fuel injectors for these cars? Thanks!