1998 Pontiac Firebird Repair Question
Topics covered: Gas, Upper intake plenum, Vacuum leak.
Mileage: 90,000 miles.
Mileage: 90,000 miles.
Asked on December 6, 2011
On 3.8 fuel injectors there is a oring on the bottom where it fits into intake..there is also a thin ceramic or plastic ring what is its purpose.
I replaced upper intake plenum gasket because of water leak..i was going to replace the bottom o-ring on the injectors and two of the small thin rings just fell into pieces..what do they actually do..thank u
Asked by rickh69uAnswer
Replied on December 6, 2011
The orings keep fuel and vacuum from leaking.
Replied on December 17, 2011
ok the bottom oring seals from vacuum leaks and fuel..the nylon ring isnt big enough to seal anything it fits tight to injector but not in the bore in intake
Replied on December 17, 2011
So did you get the injectors all fixed up?Looks Like that Nylon ring keeps the oring from moving out of place.