Diesel fuel in the valley (leaking somewhere)

[BigRed01]

Ok, when I get home from driving the truck and park it, I notice that it drips a little underneath the truck and it has been progressively getting worse. I researched a couple threads on here and thought I found what the issue was. Well, it turns out I do not believe it was the issue. Anyways, there is diesel fuel building up and sitting in the “valley” of the engine and flows down underneath the truck and makes it look like it is a rear seal main leak; which it’s not. So I checked the HPOP and made sure there were no fluids on the seals or anything and they look dry as can be. So I do not think the “O-rings” on the HPOP is the issue. I do believe it an O-ring issue I just don’t know where else to look. It also smells like diesel whenever I get out of the truck because of this. It is leaking from somehwere and I need some help please. Can someone help me out please? Pictures work great, so if you have any that would be greatly appreciated.

[CHUCK]

if it was diesel leaking anywhere from the HPOP...you'd really have problems....High Pressure Oil Pump.

Check the drain valve on the Fuel Bowl. I've seen to many leaks there!

[Chuckee]

Take a look at your water separater valve. Had the same problem, replaced the valve and all is good. Kind of a bear to get to the screws...good luck

[BigRed01]

I actually think it is coming from their also. I ordered a new one and now o rings for it to see if that is the problem. When they come in I am going to change it out and hope that is the issue. It was just hard to believe that, that is producing a lot of diesel in the valley and dripping down. There is a gold tube that runs from the water separator are down and there is nothing at the end of the tip, it almost reminds me of an overflow drain. Do you know what this is? And should it also be leaking diesel. Because I think it might be?

[Chuckee]

That is the overflow for the water/diesel when you actually open the separater valve. I personnally added an extension to allow me to direct the flow into a container (do not want to make a mess). My indicator stop working some time ago, so I periodically drain it...maybe once every couple of months.

[BigRed01]

Since I think we have narrowed the leaking down to the water separator valve, is it common for the over flow pipe to leak when the water separator valve is leaking? And what were you talking about when you said your indicator light has been out for a while and you drain it every couple of months? You drain what exactly? And you are talking about you put an extension on to it and guided it into a bucket when you changed the water separator valve? Or when?

[Chuckee]

Yes, if the O ring/s are shot, diesel could leak from between the valve body and the fuel filter housing as well as down the overflow tube. You have an indicator on your dash that will stay lit if water is detected. Mine does not work so I periodically drain the filter just to be sure I am getting the water out of the fuel. To drain the water, you open the separater valve; move the yellow lever to the open position (90 degrees and perpendicular to the filter housing). If you drain the water/diesel into a glass container and let is settle, the water will separate if you have any (that way you can visually check for water in your fuel). My drain tube was only about 8" and would flow onto the frame and splatter. By adding the extension I can direct the flow into a container for disposal. Mine is permanent. I think it is a 5/16" clear tube I got at Home Depot.

Be sure to close the valve when it finishes draining....DOH

[BigRed01]

Ok, so let me try and get this straight. I am having diesel fuel in the valley of the engine and leaking from the overflow drain tube. Am I right when I say that the water separator valve and the drain valve on the fuel bowl are the same thing? Maybe I am a little confused. I am still new to all this and learning as much as I can. I just bought some new o rings and they should be in soon, I also ordered a new water separator valve. Because on mine the part where the four screws go and look really wet, and that gold tube all the way down is also wet. I will also try to put some pics up of it a little later today.

[Chuckee]

Yes, the water/diesel separater valve does drain the fuel from the fuel filter housing (bowl thingy). The new valve should come with O rings.

[CHUCK]

same thing...............