Fuel pump hard line o-ring sleeves keep dissapearing - Ford Powerstroke Diesel Forum
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Old 10-20-2013, 07:22 PM
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Fuel pump hard line o-ring sleeves keep dissapearing

I'm working on a 95' 7.3. Just put a new fuel pump on it and I'm having trouble with the rubber I ring sleeves for the fittings on the back of the heads. I installed everything with the existing I rings and the passenger side fitting was gushing fuel, pulled the line off and the I ring was missing.

I thought, ok It must have just fell off when putting the pump in. So I went down to the ford dealership and hot a couple new o ring sleeves and replaced the missing o ring. Initially there were no leaks, throughout the rest if the day it began to weep a little bit, then turned into dripping, then turned into gushing fuel out of it. I tore the line off again and the o ring was completely missing except for a tiny, tiny piece of it.

Is it possible that it could have been over tightened and the I ring blew out?

Tell me if this is incorrect, I put the o ring sleeve over the flare of the hard line and just tightened the nut didn't until it was snug. Again, this is the fitting on the passenger side head, underneath the downpipe.

I don't want to put a new o ring in and have it leave me stranded if I am just missing something.
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Old 10-22-2013, 10:33 AM
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The sleeve goes over the flare and onto the hard line. The flange nut goes over the sleeve when you assemble it, and both push the hardline flare directly on the nipple on the head. Sounds like you are doing it right though. I know when I replaced my hardlines, there was only about an o rings worth of the sleeve remaining. The new ones were about a 1/4 inch in length.
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Old 10-22-2013, 11:09 AM
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Thanks. I put the new o rings in and it doesn't leak.

Thanks for the reply
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