I'm replacing the fuel return lines in my 86 F250. ONe of the injector caps in the kit is defective. Well, either that or there's a bad o-ring in there. I was thinking of using an o-ring from my collection, but those are for AC, not fuel. I just don't want the fuel to shred the o-ring and then have the inject suck in bits of shredded o-ring.

Just me but i wouldnt mix and match O-rings like that. If its meant for AC then its not meant to withstand gasoline and will probably deteriorate quickly.

Its diesel, but...yeah...thats sorta what I figured.

Its diesel, but...yeah...thats sorta what I figured.

 

Yea i meant diesel fuel my bad lol. You got what i meant though.