klineta89

On my 01 im noticing a smell of fuel and under a few of my injectors u can see diesel layin on the head so how would i fix this

TurboDeezul

Are your 19mm injector line hold down nuts tight enough? They don't need to be cranked down a ton, just snugged up so no leakage occurs during fuel injection.

klineta89

yea i tried snuggin them up they are pretty tight when i got the truck it had 250 injectors in it and he wanted to keep his injectors so he bought brand new injectors and put them in and since then its been leakin

Tree DR

Do they have orings and did they replace them or reuse, also if they rolled one putting it in might cause leak, even a small blemish might cause leaks.

klineta89

Im not sure on that at all where could i find the o rings at and how do i get injectors out to change the orings

JD730

You don't have to pull the injectors to change these o-rings.

The o-rings everyone is speaking of are on the connector tubes, it goes from where the nut threads into the head into the injector in the middle of the valves. There's a little o-ring on them, most of the time you can just reuse them, but sometimes the get tore up. Cummin's would probably be the best place to get them.

Do you notice any of them leaking at idle? I've had them leak at the high pressure fitting and would only leak if you gave it some fuel. Loosening them up and retightening generally is the best way to seal the high pressure fitting.

There are o-rings on the injectors, but if they were leaking you would have fuel in the oil.

Junk Man

I'm unclear where it is leaking. IF where the hard line connects to the injector tube, pull and clean the tube ends ie with scotch brite or fine (1000 grit) sandpaper, install new Cummins O-ring on injector tube, reinstall. If it still leaks, loosen connection a little & re-seat.

I had this problem when installing my VP & that's what finally stopped the leak. Shop wanted to sell tubes at $24 each. O-rings are $1.79. Torq specs are ~ 24# but it took more to stop the leak.

Dinner

Torque spec is 28ft lbs for the fuel lines at cylinder head, and is very critical with these injector lines and cross over tubes. But I would agree that your o-rings are probably faulty and need replacing

Tate

Take the line off, make sure the tapered ends of the line and the connector tube and try it again. Won't cost you a dime, and will likely fix your issue.