bio350

I have a 93 350 and the high pressure fuel lines are leaking right where they come off the high pressure pump. I don't want to just unhook them without knowing what I need. Are these compression fittings? Can they just be tightened or do I need something new?

dj_souvlaki

haven't taken mine off but i know from vw diesels they just tighten up. grab a wrench and try tightening them up a bit. have they ever been off?

bio350

No they have not been removed. I have been reading that at the actual injectors they have copper washers. I'm just not sure about the right at the HP pump.

dj_souvlaki

from the injection pumps i've seen have all been compression fittings. i guess the only real way to tell is buy removing them. are they all leaking or just the one?

bio350

They are all leaking. I'll just tighten them a little and see if it helps. I'm running home brew bio so if there are any rubber o-rings that will be the culprit. I replaced all my rubber fuel line but was not sure if there was rubber in the injector lines or not.

torquefan

There are no gaskets there, just metal on metal. Try tightening them (don't overtighten). If that doesn't work, loosen then retighten them. Several I've had to remove completely and polish up the sealing surface of the fitting with some fine sandpaper. These problems usually occur after someone overtightens the line. Before you get too carried away, make sure it's actually the lines that are leaking and not the small plug in the center.

bio350

Thanks torquefan, didn't even notice the center plug. And that's what I was worried about the tightening.