Leaking diesel, but from where?! - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 05-08-2013, 02:32 PM Thread Starter
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Leaking diesel, but from where?!

I definitely am leaking diesel, noticeable on the ground and the smell in the cab. I've been trying to diagnose where I'm leaking diesel from, but I have not been able to pin-point where/what is leaking.

My lower radiator hose needs to be replaced either as it seems it may be leaking a little bit as well. It's hard to tell where the diesel leak is coming from due because there is saturation in several places.

Any starting points I need to check out? Where the components are located & what they are will be helpful, etc

I've tried to look through other posts, but I haven't worked on my truck that many times so please excuse any newbie questions
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post #2 of 12 Old 05-09-2013, 05:56 AM
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I'd start by checking up around the fuel bowl to see if all of the fittings are secure then start tracing the lines around the area that you notice fuel on the ground. Fuel bowl is on top of the engine attached with the oil bowl. That's just where I'd start because all of that can be done without removing much besides maybe your airfilter for a better view.

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post #3 of 12 Old 05-09-2013, 06:00 AM
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agreed the area around the upper filter and regulator is common

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post #4 of 12 Old 05-11-2013, 03:53 PM Thread Starter
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Sorry it took so long to get back on here, but I just now have had time to check it out. I removed my battery, intake, and degas bottle. I'm not seeing anything easily visible as leaking, and no signs of anything being wet with diesel. I traced the lines all the way down and to the tank with no luck. The leak is showing up on the ground towards the front of the truck. Problem is my lower radiator hose is bad also so now that I have two spots showing up I'm not entirely sure where the leak is.

I've seen in a few other help threads of some kind of seal being an issue with people mentioning diesel leaks. Any info there? Also I noticed a line (or 2?) leading towards the passenger side of the truck from the fuel bowl if I recall correctly.. anything I should be checking there?

I can only smell diesel heavily in the cab when the truck is running or when I'm driving. Now that I think about it, I need to check the fuel filter on the bottom of my truck also.
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post #5 of 12 Old 05-12-2013, 06:28 AM
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The line you see running to the passenger side of the engine is the fuel line which feeds that bank of cylinders. There is also one that runs to the drivers side. There is a banjo bolt with copper sealing washers there. It is possible to have a leak at either of those two spots but unlikely, unless they've been disturbed recently. The most common leak is the FPR housing gasket....6.0 powerstroke fuel leak at the upper fuel filter, good ti - YouTube

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post #6 of 12 Old 05-12-2013, 11:04 AM Thread Starter
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I actually found that video last night and with today being mothers day I'm not going to have time to check on it today most likely. The repair looks pretty straight forward. Any idea on how much that seal costs?
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post #7 of 12 Old 05-12-2013, 12:34 PM
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Well if you haven't upgraded your FPR to the blue spring, then now is the perfect time to do it. Kit comes with all the seals. 69 bux seems to be the avg. going rate, unless you shop around or Ebay that thing....6.0 powerstroke fuel pressure upgrade | eBay

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post #8 of 12 Old 05-12-2013, 04:24 PM
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Whoah whoah whoah, hold the horses, best price ive seen yet...Riffraff Diesel: Ford Fuel Pressure Regulator Blue Spring Kit

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post #9 of 12 Old 05-12-2013, 08:10 PM Thread Starter
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Thanks for the info! Time is a factor in my repair, so I'm going to check so see if the dealership here has the kit for a decent price. I've got to replace my lower radiator hose, hood strut, and I want to do a coolant flush/tstat replacement and they usually get their part orders in on Tuesdays.

Speaking of the lower radiator hose, aren't there two different types?
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post #10 of 12 Old 05-19-2013, 09:38 PM
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I had the same issue pretty much. Fuel leak was at a hose/line behimd the motor towards the top. By the time it ran down everything it looked kike it was coming from some place else. Took it to the dealership and they replaced it. Drive me nuts driving because you could smell the fuel just enough. Hope this helps a little, sorry I could t get into more detail but that's what I remember from them telling me. They said it wasn't to uncommen. Replaced the or actually tighten the fuel lines and it fixed the problem. Could give you a price because I had the #3 injector replaced at the same time and all in all the over all price on everything was $2700
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