fuel leak 7.3 - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 24 (permalink) Old 02-12-2007, 11:07 PM Thread Starter
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fuel leak 7.3

i have fuel laying under my banjo bolt. put new rings on it and still a leak. could it be possible the fuel pump is leaking? no fuel is coming from the front of the motor and i just put some new hoses on. thanks for any input.
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post #2 of 24 (permalink) Old 02-12-2007, 11:22 PM
 
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What year is your truck? 94-97 Powerstrokes had the fuel pump in the engine valley in front of the banjo bolt that does leak from time to time. I've seen more pumps leak than I have the banjo fittings by themselves and any fuel or oil tht leaks into the valley drains back to that area and down the bellhousing. Also check the fuel lines between the filter housing and the pump and check the fuel seperator valve for leaking too.
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post #3 of 24 (permalink) Old 02-13-2007, 12:59 AM Thread Starter
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yeah its a 95 powerstroke. i just replaced the rubber fuel lines thinking those were possibly bad,and i still have the leak. thanks for the response.
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post #4 of 24 (permalink) Old 02-13-2007, 01:48 AM
 
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Oh boy. I've been thru this and still sometimes have nightmares about chasing down a fuel leak in the valley.

You're on the right track. If fuel is puddled in the valley, under the banjo bolt (BB) & you've already replaced hoses & BB seals then the pump is leaking.

Getting the pump in/out can be a chore. It's pretty straight forward, it just takes time. Good luck & ask more questions if you run into a problem.
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post #5 of 24 (permalink) Old 02-13-2007, 05:52 AM
 
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Go to Steve Baz's web site for tips on how to replace your fuel pump.Need to make sure that's your problem,pump cost is around ninety bucks.Good luck.
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post #6 of 24 (permalink) Old 02-13-2007, 07:18 PM
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I got the drip

I think I have the same problem on my 2002 F-250 7.3. last week or so been smelling diesel inside my cab. Today smelled worse so I got under it and saw a wet spot and it seemed to be coming down my bellhousing. Opened the hood and crawled up on it. Diesel seemes to be leaking from bottom of my fuel pump in valley. Could this just be a gasket. Seems to run good haven't noticed any changes. Any help would be much appreciated as I need to fix this myself (broke michigan construction worker lacking work). Would like to know what i am getting into before I go rippen and tearing it off. Its 13 out right now without wind chill and truck will not fit in garage (fun). Thanks
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post #7 of 24 (permalink) Old 02-14-2007, 12:46 AM
 
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tnutz,

Don't quote me on this since I don't have a SD, but I think the fuel pump on 99+ year models is on the frame rail under the truck somewhere. I think the only thing fuel related in your valley is the fuel filter canister & maybe a fuel regulator.
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post #8 of 24 (permalink) Old 02-14-2007, 02:37 AM
 
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Ok won't quote you Biggreen . There's a weep hole on the bottom of the 94-97 pump. Usually leaks out of it from inside. Hard to tell as you can't see. Best way I know to isolate it is to clean it up, then build a dam with paper towels around pump. Watch for a wet towel to locate the source. If it's not the lines and wetting in the pump area. You need a pump.
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post #9 of 24 (permalink) Old 02-14-2007, 04:27 AM
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:Thumbup: i had a fuel smell in cab once, got out saw small stream of fuel. finally traced it up to filter, down valley, down bell. dont know if you have filter on top front of engine. my 03 and late 80's at uhaul are like that. anyways i chnged my filter and everything aok after that.:shrug:

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& 1993 F-350 7.3L CREW CAB 5SPEED

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post #10 of 24 (permalink) Old 02-14-2007, 04:31 AM
 
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Guys with the 99 and newer psd`s. Check your o rings on the fuel/water sep. These will start to leak and also leak out the drain tube and onto the ground. They will basicly only leak while the truck is running. (system is pressurized)

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