Hey guys i have a couple of questions. I have a fuel leak I noticed the last night when i went to pick up the truck that I let a freind borrow. I didn't get a good look at it as it was getting dark. I could tell it was dripping from the X pipe. I just installed injectors about a month ago and think i may not have gotten the lines tight, but the truck runs well. This is also the 2nd tank of ULSD that truck ran on.

My questions are if it is comming left side injectors with it drip from x pipe?
Could it be ULSD erroing seals around filter canister.
Is it save to drive it back home which is about 50 miles?
I am not sure what the heat is at the xpipe, but fuel leaks scare me.:eek:

I've been driving around with fuel leaking onto the X pipe since January. No fires yet! It's my fuel filter canister...many new filters don't want to seal on it anymore. I managed to slow the leak enough so that there is no small puddles left wherever I park it. You should be fine to drive it for a little while. However, pop the hood to confirm the leak location first. I knew mine was coming from the filter so no biggie.

Mine was doing the same thing, i found it at the filter area after chasing it for several days. I'm currently in the process of pulling the intake and changing all the rubber type hoses to/from the filter, IP, return and fuel lines. (among other things) The factory crossover is double-walled so the outside dosen't get as hot as a normal exhaust pipe, IMO- i wouldn't drive it much with a fuel leak. I don't think my leak had anything to do with ULSD.
Don

okay, after a bit of research...don't drive that thing far AT ALL with diesel leaking on the x-over (At least not if you're working it hard). Check out this link: http://hypertextbook.com/facts/2005/EileenTang.shtml

It appears the auto-ignition temp for diesel is lower than I first thought. I believe this is the temp at which it automatically ignites (apparantly around 500 deg. F). Can anyone else confirm the numbers? Maybe I shouldn't have been driving it like that:eek:

Leaking fuel is not a good thing at all, so need to fix it, probably won't flash at temps on exhaust pipe unless idling after really hot drive, air while driving probably keeping fuel from direct spray onto pipe plus keeps pipe cooler with air flow, that said fix the leak.

Fuel filter manager has seal on the top cover, a seal on the bottom of the bowl, for the heater element, and one on the side for the WIF sensor element, bottom & side are O rings which go flat may need replacing, also the rubber fuel line to the IP under intake may be leaking, also the rubber portion to the steel supply & return lines are where I'd look for center/back of engine problems/leaking, if coming from side look at the return jumper lines on the injectors

okay, after a bit of research...don't drive that thing far AT ALL with diesel leaking on the x-over (At least not if you're working it hard). Check out this link: http://hypertextbook.com/facts/2005/EileenTang.shtml

It appears the auto-ignition temp for diesel is lower than I first thought. I believe this is the temp at which it automatically ignites (apparantly around 500 deg. F). Can anyone else confirm the numbers? Maybe I shouldn't have been driving it like that:eek:


Thats the same thing I found which got me concerned.
Thanks for all the replies. I hope it is one of hte pesky return lines
or something simple. I do not look forward to taking the intake off.

Should not have to take intake off, fuel filter mgr held on at back of intake, 2 bolts, 3 lines in-out-drain, and if IP line is leaking rerun it with new line using old one to pull in the new one under the intake, it's all rubber from fuel mgr to the IP. Make sure replacment line is good for Diesel use.

Hey Turbine Doc

Are the o-rings on the sensor and heater a standard size? I can get AS568 viton o-rings from our local supplier, but would help to know the size before I pull the filter unit off the truck.

Just noticed that mine was dripping a lot yesterday after filling up. The lines are ok, but the o-ring on the sensor is getting the sensor all wet.

Thanks