Fuel leaking from around the injector - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 07-12-2011, 07:11 PM Thread Starter
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Fuel leaking from around the injector

I have fuel leaking from near the injectors of a 1991 Ford E-350 diesel 7.3

I was told to replace the o-rings the outside part of the injector, so I ordered high temp "a-111" (is that the right size?) o-rings. They came yesterday. I swapped them out, fitting the orings into their grooves, and it still leaks.

The two replacement rings are the same size, but one of them fits super snug and the other is loose enough to slide-rotate in its groove. Should they both be the same size? Is it okay that one rotates slightly?

It looks (?) like the leak is coming from that place where the injector, oring, oustide-plastic-thing come together.

Is it possible that the orings would make a perfect fit, but if there is a problem
elsewhere (with pressure) the leak would come from around the oring?













(7/16 ID /x 5/8 OD X 3/32 long)
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post #2 of 2 (permalink) Old 07-16-2011, 04:48 AM
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You didn't get the right parts, Ford (and IH) have a KIT for this with new spill caps (plastic things) o-rings and I think the spill hose and clamps. It's not expensive, I think about $100 for everything.

'93 F-250 HD, 7.3L IDI, 5spd - FARM TRUCK
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