Fuel line O-rings

[buickpe87]

Hi what is the correct size for the O-rings

- between the fuel rail and return line?
- between the fuel feed line and fuel regulator?

Thanks in forward!

[kenmosher]

From memory, I believe they are the same ones used for the injectors (cheap and easily available from GM or other sources).

[chrisgarrett]

I'm a little confused about this. The o-ring that connects the fpr to the rail appears to be the same as the injectors, but the smaller o-rings that connect the feed and return to the fuel rail are 3/8". The o-rings at the bottom of the fuel feed and return (down by the frame) are 3/8" feed and 5/16" return.
You can buy the o-rings in a blister pack from napa. The part number is 7304912

http://www.napaonline.com/MasterPage...ng+-+Universal

[buickpe87]

Originally Posted by chrisgarrett

I'm a little confused about this. The o-ring that connects the fpr to the rail appears to be the same as the injectors, but the smaller o-rings that connect the feed and return to the fuel rail are 3/8". The o-rings at the bottom of the fuel feed and return (down by the frame) are 3/8" feed and 5/16" return.
You can buy the o-rings in a blister pack from napa. The part number is 7304912

http://www.napaonline.com/MasterPage...ng+-+Universal

Thanks! My indication was not so good. I mixed the feed and return. Sorry! Anyway, my question related to the O- ring in the joint between the fuel line and rail(passenger side) and second one in the joint between the fuel line and the bottom of the FPR.