PossumF250
Registered User
Hello all, this is my first post here, but I'm a longtime reader and this forum has helped me solve a number of problems with my truck. My current problem, which I have not yet seen a solution for here or elsewhere, is an injector cap that will not stop leaking. I have tried three caps and probably six sets of Viton o-rings (installed with lithium grease) on this one injector. Each time the cap snaps/clicks into place, but starts leaking badly within a couple minutes of starting. I have recently replaced caps and o-rings on several other injectors, none of which leak now, except this one. The leaky injector has a few fairly deep scratches in and around the grooves where the o-rings go (likely from when I removed the old o-rings), so I'm guessing fuel is getting past the o-rings in those scratches. My question is: is there anything I can do to get the o-rings to seal? I thought about putting RTV silicone in the grooves before reinstalling the o-rings in order to fill the scratches, but I've read it can flake and contaminate the fuel. I figured that surely someone else has run into this problem, and I'd rather not replace the injectors if there's another solution.