Fuel leak???????? - Dodge Cummins Diesel Forum
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post #1 of 17 (permalink) Old 02-11-2010, 07:20 AM Thread Starter
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Fuel leak????????

i have a 98.5 24 valve and it has a fuel leak if it sits for an hour you can see a bit hanging off the bell housing but absolutly everything is dry?
i didnt have a leak untill the other day after an injector line blew off so i replaced #6 line..... all hoses are dry but if i drive the truck to work or home which is 18km and open the hood it is full of smoke from fuel leaking down somewhere but once again no leaks


1998.5 24 valve 3500 automatic
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post #2 of 17 (permalink) Old 02-11-2010, 11:14 AM
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Fuel does not sweat. You got a leak. Since you were back in never never land lately.
Look at banjo bolt on REAR of head. Look at three way return line fiting behind LP. Look at all fittings and line in that area. Something is damaged or loose. How about #6 line since it is so easy to properlly tighten. My internet eyes can't quite make it out. Maybe if you raised the hood in broad daylight on a South bound interstate I could do better. HaHa

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post #3 of 17 (permalink) Old 02-11-2010, 12:32 PM Thread Starter
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i have checked every fitting includin the banjo on the rear all t fittings and all injector lines i have the hood up everynight afer work looking and looking for the prolem i am just curious if there is something i dont know could a injector be leaking externally is there any other possibilities?

1998.5 24 valve 3500 automatic
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post #4 of 17 (permalink) Old 02-11-2010, 03:34 PM
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Hey bull rider, I have a similar problem with my 2002 truck . I have a fuel leak on top of the engine, and I have tightened the connections at the 3 way fitting and the fitting at the back of the head with no results. I wonder if the leak could be coming from top of the intake manifold since it seems to leak only high speeds. Still scratching my head over this one. Open to any ideas.

2002-NV5600,Edge EZ,Muffler Delete,BHAF,Reman VP44,Isspro Fuel Pressure Gauge,MK1 B3 Boost Gauge,Opti-Lube in fuel, and 325,000 miles and still GOING........
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post #5 of 17 (permalink) Old 02-11-2010, 04:24 PM
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Oh, It could be dribbling straight out of the sky.
Reread post # 2. Get in there with a flash light. Get under the truck. Get on top of the truck. You are SURE it is diesel fuel. Not water, PS fluid, condensate leak from AC.
Injector leak would be from combustion leak at bottom of injector, or leak into crankcase, or leak at line fitting, or connector leak at line fitting. LOOK LOOK LOOK>>

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post #6 of 17 (permalink) Old 02-11-2010, 04:31 PM
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Use baby powder that stuff does wonders on detecting a fuel leak. Just spread it wherever you believe the leak to be coming from. That is how I found the leak on my 99

Edit: Of course make sure you try to remove any fuel or whatever is leaking residue

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post #7 of 17 (permalink) Old 02-13-2010, 03:55 PM Thread Starter
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Quote:
Originally Posted by dozer12216 View Post
Oh, It could be dribbling straight out of the sky.
Reread post # 2. Get in there with a flash light. Get under the truck. Get on top of the truck. You are SURE it is diesel fuel. Not water, PS fluid, condensate leak from AC.
Injector leak would be from combustion leak at bottom of injector, or leak into crankcase, or leak at line fitting, or connector leak at line fitting. LOOK LOOK LOOK>>


once again i have a hoist it has been up on it everynight looking for it i have preassureized fuel system and even goe as far as puuting dye in it and used a black light and still cant see anything

how popular are the injector tubes for leaking?

1998.5 24 valve 3500 automatic
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post #8 of 17 (permalink) Old 02-14-2010, 05:47 PM
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If your injector tube is leaking it will come out through the fitting on the head... I had a fuel leak on my 99 after I changed the fuel filter. It was where the 2 wires go into the top of the fuel filter canister.

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post #9 of 17 (permalink) Old 02-14-2010, 09:27 PM Thread Starter
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top of the canister? or the bottom where the water sensor is?

1998.5 24 valve 3500 automatic
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post #10 of 17 (permalink) Old 02-15-2010, 12:49 PM
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At the top, where the two wires go in there is a rubber grommet sealed by an o ring. but it leaked towards the firewall and unless i put my hand up there it looked like it was coming from the bottom....

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post #11 of 17 (permalink) Old 02-15-2010, 06:32 PM
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Any idea on prices of much a new canister top costs? My 99 is doing the same thing, it is leaking where the wires enter the canister. I haven't checked O'Reilly yet but I will post the price when I find out.

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post #12 of 17 (permalink) Old 02-16-2010, 12:41 PM
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I used epoxy on mine... But later read there is an O Ring inside that can be replaced...

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