Fuel leak on cp3 fitting at high pressure line

[AMassaro]

Fuel leak on cp3 fitting at high pressure line



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Well got under the truck and first thought I had an oil leak somewhere. Nothing ever on the ground in my garage. Just noticed stain(s) on front of front diff. Did clean all areas and found what I thought was oil, but figured out it must be diesel mixed with road grime on crossmember. Oil filter tight and no stains. Then I saw a couple drops of fuel on bottom of ecu(m)?... What I finally found is the only place that was wet with diesel was the fitting on the high pressure line that leads up to the injectors.



What should I do? Give it a good tightening? Anyone else notice a leak in this location? Nothing dripping when I started her up at idle. Couldn't check any other rpm by myself. Will check again after work. Advice please. . !!!

 

[JFielding]

Cp3

I would take it to the dealer. My CP3 was replaced. There appears to be a large number of failures on the 04-05 trucks.



If you put your own wrench on there the dealer may void your warranty.



Joe

 

[Prairie Dog]

Carefull tightening it ~ only 18ft lbs. You could replace the small seals in the fitting and then tighten it if you dont want to deal with a dealer. If that doesnt work you wont have done anything thats evident to the technician.



Scotty

 

[AMassaro]

I'm going to try to tighten it and see what happens.

Thanks...

 

[AMassaro]

Just got thru tightening most of the fittings on the common rail. After I got in there and really looked and felt around, I think the leak was coming from either the overflow valve or one of the fittings that led to an injector. I was able to "snug" the top of the valve and one fitting probably between an eighth and a quarter of a turn (which was surprising, because I was using an open ended wrench and not alot of leverage). The other fittings that I could reach did not move.



Interesting things to note:



1- I'm losing more of my hearing as of today, or whatever I did GREATLY quieted down the engine. Not as much clatter. Just alot quieter and smoother sounding.



2- Does anyone think that this is just something that wasn't tightened enought at the factory OR maybe just worked its way loose a tiny bit? Do you think that is why some of us SWEAR their engines get louder after awhile?

I have only 11,000 miles to date.



Hopefully this took care of the problem

Thanks for your help...

 

[JDerbedrossian]

main line going to the rail was loose on my truck, wouldnt leak at idle but put a load on it and my front diff was covered with fuel, put a wrench to it and got atleast 1/2 turn befor it snugged up.



Jake

 

[AMassaro]

Glad to know I'm not the only one...

 

[mroodzant]

I pulled off the The highway and smelled Diesel. I opened the hood and had diesel pouring out of the fuel lines. this was in April of 2004. The truck had 10000 or less miles. Dealer said they re-torqued the fuel lines. 50000 miles now. I have noticed a large amount of staining under all the high pressure fuel lines. I guess I will see if I can snug them up and clean up the fuel mess. Does this sound like a simple fixed problem or am I missing something?