fuel leak behind banjo bolt - Ford Powerstroke Diesel Forum
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Old 06-18-2013, 06:07 PM
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fuel leak behind banjo bolt

Like the title says, i have a fuel leak in the engine valley. Its behind the banjo bolt, which leads me to believe it is the fuel pump My question is, how long does the pump usually last for after it starts leaking? Cause i really cant afford a new pump right now, i am going off to school in a week. Also, any other places it could leak right there? And how hard is the pump install, i know it is important not to drop the tappet thing in the engine.
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Old 06-18-2013, 06:15 PM
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the pump can leak, but so can the two gaskets that seal the banjo bolt, the fuel lines, and the pump
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Old 06-18-2013, 06:19 PM
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Ok, its hard to tell where its coming from. Its pooled underneath banjo bolt though. I always use diesel kleen to try and help lube everything, and so did the owner before me. The pump itself looks original, and prob is with 192k miles. I tried looking with it running, but i didnt see anything dripping when watching. I just noticed fuel running down off my starter.
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Old 06-18-2013, 06:24 PM
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The fuel bowl o rings can leak as well as the 3 rubber hoses. you may want to pull the fuel bowl and reseal it, diesel o rings sells the complete kit, replace the 3 little hoses, and the gaskets on the banjo bolt (it think they are $3 from ford). the fuel pumps used to be about $100.

when i replaced the gaskets on my father's truck it took me two tries to get them to seal properly.
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Old 06-18-2013, 06:30 PM
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Ok. If it was the fuel hoses, would it pool under the bowl or pump? Where its pooled has me worried its the pump. I wish i could just run this pump into the ground for as long as i can and save up and gather parts for e fuel.
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Old 06-18-2013, 07:03 PM
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Ok, so i checked the fuel pressure from my fpr. I uesed just a cheap tire gauge, but it sprayed fuel everywhere and i only read 5 psi at idle. I dont see how thats even possible, it idles great and runs good, pretty good throttle response, at least to me. Idk what it is supposed to be at.
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Old 06-18-2013, 08:25 PM
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Chances are slim that the banjo is leaking, unless you recently fiddled with it.

Chances are quite good that, like Terry says, old fuel lines, drain valve o-rings, or the bowl heater o-ring, lift pump, etc are leaking. They all drain to the same place - the valley. Do them all at once and save yourself the questionable bonanza of doing it twice.

The ultra low sulfur diesel wreaks havoc on the old o-rings. Bob at diesel o-rings can fix you up if you don't want to have a detached and glassy-eyed Ford parts guy looking at you like you were Dracula himself.

I have found the cheap fuel lift pumps from the O'Reilly's and Autozones of the world aren't worth the effort. Spend the $130 or so, and get the Navistar pump if you are going to keep the OE fuel system. It has a diaphragm that that is more tolerant of the ULSD.
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Old 06-18-2013, 08:38 PM
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Yeah, if i dont do efuel, ill replace all that stuff for sure. But any help on the fuel psi? I just dont see how it can have that low of pressure and still run good and get good fuel mileage like it does. Around 16 mpg in town.
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Old 06-19-2013, 12:03 AM
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Quote:
Originally Posted by _95stroke View Post
Yeah, if i dont do efuel, ill replace all that stuff for sure. But any help on the fuel psi? I just dont see how it can have that low of pressure and still run good and get good fuel mileage like it does. Around 16 mpg in town.
I doubt your truck would run on your measured psi. Might want to recheck your measuring tool.
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Old 06-19-2013, 04:15 AM
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i had 12 psi on my pump before the e fuel swap and it ran great. i just assumed my gauge was wrong, but nope it works prefectly, just fuel pressure sucked.
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