Fuel Pin Leak a emergency? - Dodge Cummins Diesel Forum
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post #1 of 9 (permalink) Old 03-24-2020, 08:58 PM Thread Starter
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Fuel Pin Leak a emergency?

I've got diesel slowly dripping out of the AFC Vent and read its the fuel pin o-ring and a desert trip we are leaving for on Thursday, in 2 days. Truck seems to drive perfectly normal at all rpm ranges. I did reseal the pump myself in 2015 when I bought the truck but did not change this o ring as I don't think.

Anyway I am asking if it would be a bad idea to drive 100 miles out to the desert with our toy hauler or if its not a big deal and not likely to get worse, start gushing fluid, or kill the engine?


Thanks guys, stay safe!


92 extended cab long bed D250, Getrag 5 Speed, 4" Straight Piped, 366 Spring, DAP 5x12s, AC, Air bags, 3.54 ratio, 220k miles.
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post #2 of 9 (permalink) Old 03-24-2020, 09:23 PM
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Only about an hour to yank the top and replace the O ring.
Is the fuel pin standard, a deep cut one can allow fuel past the O ring at full throttle.
Cheers Steve

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post #3 of 9 (permalink) Old 03-24-2020, 09:26 PM Thread Starter
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It is a BD Pin and not sure if I have the stock one. I am still able to work (drive heavy equipment) or I would have all the time in the world to change it out.

92 extended cab long bed D250, Getrag 5 Speed, 4" Straight Piped, 366 Spring, DAP 5x12s, AC, Air bags, 3.54 ratio, 220k miles.
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post #4 of 9 (permalink) Old 03-25-2020, 12:28 AM
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It is a BD Pin and not sure if I have the stock one. I am still able to work (drive heavy equipment) or I would have all the time in the world to change it out.
Dump a heavy dose of non synthetic tcw-3 2 stroke oil into a full tank of fuel then drive it. Chances are the leak will slow or even stop!!! 2qts to a full tank of fuel should be enough then after that do 1qt/tank until you can replace the seal. I have done this before and it worked for me. The leak will not make you break down but it is a fire hazard that would be my only concern.
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post #5 of 9 (permalink) Old 03-25-2020, 01:43 AM Thread Starter
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Thanks will add some 2 stroke oil, don't suppose people are hording that! Lol

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post #6 of 9 (permalink) Old 03-25-2020, 09:53 AM
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Thanks will add some 2 stroke oil, don't suppose people are hording that! Lol
I mean they might be.... people are buying crazy stuff, I was talking to a guy who bought a 40 s&w pistol just because thats the only ammo you can find!!!!
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post #7 of 9 (permalink) Old 03-26-2020, 12:41 AM Thread Starter
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I dont get people that dont have ammo. I'm not a prepper or a horder but have a few thousand rounds of each caliber i shoot most often. Just like everything else in life it is cheaper in quantity.


Got the truck all loaded for the desert. Leak actually seems less than it was. Maybe it fixed its self 😂

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post #8 of 9 (permalink) Old 03-26-2020, 02:41 PM
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I dont get people that dont have ammo. I'm not a prepper or a horder but have a few thousand rounds of each caliber i shoot most often. Just like everything else in life it is cheaper in quantity.


Got the truck all loaded for the desert. Leak actually seems less than it was. Maybe it fixed its self 😂
When mine first started it seemed temperature dependent only leaked while cold but then got worse and the 2SO fixed it until I was able to replace the o-ring.
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post #9 of 9 (permalink) Old Yesterday, 11:36 PM Thread Starter
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Well the trip went fine and the pin actually didn't leak at all the last few days. Truck performed flawlessly even towing up a 14 mile 8% grade up off the desert floor in 3rd or 4th depending on the corners.

Might take the rest of the week off so might pull the top off the pump and see if I can get the fuel screw loose, turn down the fuel and fix the oring.

92 extended cab long bed D250, Getrag 5 Speed, 4" Straight Piped, 366 Spring, DAP 5x12s, AC, Air bags, 3.54 ratio, 220k miles.
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