Newb with a fuel leak in valley - Diesel Forum - TheDieselStop.com
Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

 
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post #1 of 7 (permalink) Old 09-05-2018, 11:15 AM Thread Starter
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Newb with a fuel leak in valley

I Just bought this truck about a month ago and noticed in the last couple weeks that I can smell a faint trace of fuel after parking the truck. Looks like I have fuel pooling in the valley and also running out the drain hole on the back of the motor, causing the fuel to run down my transmission pan.

The banjo bolt seemed to have a little fuel on it when I ran my finger along the underside of it. I soaked up the pool under the banjo bolt on the fuel pump, but there is also a pool under the fuel bowl. I couldn't get to that pool last night to soak it up, but i'm going to give it another try tonight. I also ran my finger under the fuel bowl drain lever (yellow lever shown in the photo) and there seemed to be a drop of fuel on the underside of that yellow lever. Is this a common place for fuel leaks? I have heard the bottom of the drain valve assembly being somewhat common, but to fin fuel up that high kind of surprised me.

The truck has 213k miles and it seems everything is still original, so it may just be time to tear apart all of the fuel components in the valley and replace the orings and seals from dieselorings, but I just bought the truck a month ago, and I am not super excited about tearing down the fuel system already.

That is all of the bad news, the potentially good news is that I thought it was the tranny leaking at first glance when I saw the fluid all over the pan. and there seems to be some seepage/grime accumulation under the crank seal in the front of the motor... My hope is that all of this is coming from the fuel leak, rather than a motor oil leak and a tranny leak... I'm grasping for a silver lining haha
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Last edited by DAH7; 07-02-2019 at 05:23 PM.
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post #2 of 7 (permalink) Old 09-05-2018, 05:37 PM
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There are a few possibilities. Banjo bolt seals, fuel pump going bad, fuel filter bowl has a pinhole, and the water drain (yellow lever) has bad o-rings. Diesel O-Rings has all the gaskets and o-rings to rebuild the fuel filter bowl. Not sure if they have the pump or not. There is a great write up on replacing the pump. Sam Miller did it if memory serves.
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97 F250 4 door shortbed, E4OD
DIY intake
Kingpin Dana 60
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post #3 of 7 (permalink) Old 09-06-2018, 02:52 PM Thread Starter
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I have seen people mention various ways of getting the cam in its highest position so the pump tappet doesnt fall into your motor when removing the pump. Did you guys do anything in particular to make sure this didnt happen? One guy mentioned that if you line up the indicator on the balancer with the indicator on the cam positioning sensor that the tappet can't fall into the motor... Can anyone chime in on this? Another way I read about was to turn the motor over by just wrenching on the alternator and hope to see the pump rise slightly?? I find it hard to believe the pump will "rise" at all from this... otherwise just pulling it out seems like it would be a breeze, right?
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post #4 of 7 (permalink) Old 09-06-2018, 05:10 PM
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If the pump is unbolted and rocked loose from it's seals, as the lifter tappet comes up on the cam lobe, it will push the pump up. I just took my chances and the tappet stuck in the pump. I wouldn't call removing the pump a "breeze". That banjo bolt sits under the turbo and can be a real cork sucker to get off. 1 1/8" (if memory serves) box end did it for me. Some guys heat and bend the wrench for better clearance. I've done worse, but it's not a job I'd do for the fun of it.
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post #5 of 7 (permalink) Old 09-07-2018, 10:47 AM
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O-rings in the fuel bowl drain would be my guess if you have fuel up front in the vally. Hose it out real good with oil eater and hot water so it is clean and dry. Run it for a few min and check again with good light you should see the leak.
DENNY

Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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post #6 of 7 (permalink) Old 09-07-2018, 11:53 AM Thread Starter
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Quote:
Originally Posted by DENNY View Post
O-rings in the fuel bowl drain would be my guess if you have fuel up front in the vally. Hose it out real good with oil eater and hot water so it is clean and dry. Run it for a few min and check again with good light you should see the leak.
DENNY
I'veseen a couple people say to spray it down with degreaser and then hose it off with warm water... Is this really okay? putting a hose in my engine bay seems terrifying to me haha
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post #7 of 7 (permalink) Old 09-07-2018, 01:16 PM
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Put a plastic bag over top of Power Steering dipstick, you should be fine. I run hot water from deep sink in garage or go to car wash. It is so much easier to work/ figure out what is wrong if you have a clean motor!!
DENNY

Early 1999 F350 AUTO 4x4 CC LB DRW 4.10 6.0 trans cooler, Front hitch, 2,000 hubs/ brakes, Bilstein shocks/steering stabilizer, Diesel site coolant filter 203 thermostat, EBV delete, new O-rings, new Oil cooler, RIFF RAFF FRX, Glow plug led, Pillar gauges, Lighted cupholder, Painless wiring fuze block, Harpoon/hutch mods, Removed axle blocks. Air bags, 5 wheel hitch, In bed 7 pin plug. Spare tire key delete. KLHANSEN on speed dial. 75,000 as of May 2019
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