Well, Saturday was a busy day for me. I replaced the following items, but now I have two fuel leaks. Both of the leaks appear to be happening where the hard fuel line bolts down to the top of the injector. Curiously, the leaks are at the #1 and #5 cylinders. I did the injectors per the write-up on DieselGiant's website. The lines are connected very tightly to the top of each injector and I am afraid to tighten them more. I visited the Mercedes dealer and purchased new fuel return line as well. Two of the old injectors had a small amount of motor oil visible on the end when I removed them...would this indicate bad rings? Here is what I did....I am also suffering from serious lack of power on hills, but I am thinking this relates to the fact that I am leaking fuel.

1) Replaced both fuel filters with Bosch branded filters.

2) Installed one new copper crush washer on #5 injector delivery valve since it was leaking Diesel (this leak is now fixed). Element re-installed and torqued to 57nm.

3) Replaced all five injectors with rebuilt Bosch injectors since the originals were on there with 160k and I had some nailing. I labeled each of the hard lines when I took them off to avoid any confusion when I went to re-install them. New heat sheilds were installed with each injector and positioned properly per DieselGiants write-up. Each injector was torqued to 78nm.

4) New braided injector return line installed which was purchased from local MB dealer.

5) Installed new Hengst air filter

I was very careful to be clean about the job. The new injectors came with blue caps on each end and I left them on until the very last minute when they absolutely needed to come off. The hard fuel lines were not leaking prior to being removed. How much should I tighten the hard fuel lines where they bolt to the injectors? I tightened them pretty tight, but didn't want to be a bruiser about it in fear of breaking something.

Sorry for the long winded post, but it seems that I have fixed one leak (delivery valve) and now I have two leaks both at the injectors.

EDIT: I should also note that there is no visible smoke during the day, but at night if I look in my side mirror, I can see a grey cloud of smoke as I accellerate. She always fires right up almost instantly when I turn the key (after glowing of course). The only thing I have not done is check/clean the tank screen. I have been waiting until I can run the fuel down low enough as I don't want to drain out half a tank of Diesel.

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2008 Jeep Grand Cherokee 3.0 CRD (OM642)