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Old Dec 10, 2011 | 05:06 PM
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fuel leak question
hello so today after my truck sat last two weeks i fire it up to put in heated shop this mourning to change fuel filter this afternoon. long behold its leaking fuel now it was -5 last night and it started slow with out plugging in now valley is full when i pulled into shop. this afternoon when i got home from work its not leaking anymore so i changed filter and still not leaking with new filter and orings. woundering if the fuel filter lid oring can leak and then just stop when i warms up?
 
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Old Dec 10, 2011 | 05:18 PM
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Most likely the fuel drain valve o-rings. The old o-rings will shrink and leak in cold weather. See this THREAD from earlier today.
 
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Old Dec 10, 2011 | 05:21 PM
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i just changed them from diesel-orings almost exactly 1 year ago hmmm was a car quest filter and orings before now got a racor in there
 
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Old Dec 10, 2011 | 05:44 PM
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The fuel filter lid oring will not leak, it SPRAYS EVERYWHERE.

My money goes to the fuel drain valve.

Check out this video:

How To: Remove and Repair Fuel Bowl - 7.3L Powerstroke - YouTube
 
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Old Dec 10, 2011 | 05:58 PM
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Originally Posted by szotty
i just changed them from diesel-orings almost exactly 1 year ago hmmm was a car quest filter and orings before now got a racor in there
If it's not the drain valve then it's not the drain valve. But if it is see if you can tghten the the drain valve mounting screws a bit.

The leak could be in the passenger side head fuel supply line. It runs from the fuel bowl through a bracket and to the rear of the head. It has been known to wear through at that bracket.

This is a pic of the fuel line and bracket. Fuel bowl was removed when pic taken.



The piece of rubber hose I put between the bracket and fuel line is to protect it from wear.
 
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Old Dec 10, 2011 | 06:01 PM
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Originally Posted by PaysonPSD
If it's not the drain valve then it's not the drain valve. But if is\t is see if you can tghten the the drain valve mounting screws a bit.
Just mentioned this in another thread. I wouldnt recommend tightening the screws as a way to fend off a leak (unless the valve is truly loose). If the valve is leaking, the orings need replacing. Plain and simple as far as I am concerned. The bowl is easy to strip, and you can even damage the valve. I would much rather drip fuel for a few days, spend the $5 for orings, and change the orings out than risk over tightening the valve.
 
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Old Dec 10, 2011 | 06:05 PM
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well i will look to see if its lose otherwise i will change orings again i guess just was hopeing was large fuel oring on lid
 
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Old Dec 10, 2011 | 06:07 PM
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Originally Posted by szotty
well i will look to see if its lose otherwise i will change orings again i guess just was hopeing was large fuel oring on lid
If it was that your hood (as well as everything else in the engine compartment) would be soaked.
 
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Old Dec 10, 2011 | 06:08 PM
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Originally Posted by A/Ox4
Just mentioned this in another thread. I wouldnt recommend tightening the screws as a way to fend off a leak .
I did say "a bit". He may not have gotten them tight enough when he replaced the o-rings to begin with.
 
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Old Dec 10, 2011 | 06:10 PM
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Originally Posted by PaysonPSD
I did say "a bit". He may not have gotten them tight enough when he replaced the o-rings to begin with.
Oh. I missed the part where he mentioned that he replaced the orings once already. Very good then. Make sure the valve is snug! 22 in/lbs is the torque spec.

Also, give the valve about 10 turns. That can help seat the stem and oring better. I had that issue and 10 turns fixed my leak after installing a brand new valve.
 
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Old Dec 10, 2011 | 06:11 PM
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leaked not a drop all last winter or this summer till now so think were tight enough just maybe a flat spot oring dont know will find out
 
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Old Dec 10, 2011 | 06:17 PM
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Originally Posted by A/Ox4
.

Also, give the valve about 10 turns. That can help seat the stem and oring better. I had that issue and 10 turns fixed my leak after installing a brand new valve.
Good idea. Exercising the drain valve can help stop a leak.
 
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Old Dec 10, 2011 | 06:28 PM
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Sometimes the obvious goes unmentioned, so... the lid gasket is directional. Make sure up is up.
 
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Old Dec 10, 2011 | 06:30 PM
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Originally Posted by aawlberninf350
Sometimes the obvious goes unmentioned, so... the lid gasket is directional. Make sure up is up.
Originally Posted by A/Ox4
If it was that your hood (as well as everything else in the engine compartment) would be soaked.
Still would get everywhere.
 
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Old Dec 10, 2011 | 08:19 PM
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subscribing... having the same issue as we speak. just did a complete fuel bowl oring rebuild today.
 
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