Hi all,
Been a long time since I posted. Truck has been awesome.

So have a hydrolocked motor and looking for a little advice.
Last month and about 1000 miles ago I replaced the #7 injector, nipple cup orings, stand pipe and dummy plug. Everything has been good since then, truck was driving great. Last week took the camper out and on the way home Saturday had some issues. First I lost power on the interstate, could not make it over 50 mph, boost numbers on scangauge looked fine though between 10 and 20 psi like i would normally see on the interstate. Pulled off the next exit and it cutoff on the ramp, restarted at the bottom of the ramp and it blew a ton of white smoke. Was not a safe place to stay stopped so I limped it to a parking lot maybe half mile up the road. Scanned it for codes with forscan and got contribution codes for 1,3 and 7. Called for a tow. When it got home I tried to start it and was hydrolocked, pulled glow plugs on passenger side and got fuel out of # 7. My question is how do I know if its a faulty injector, orings on the injector or the nipple cup orings? Or should I look at something else? Since I only got fuel out of 7 should I be concerned with 1 and 3? Fuel pressure is good, blue spring has been updated and stays between 53 and 60 or so. Whats the chance that major damage has been done, how worried should I be?

As always thank yall so much for the help

 

Number 7 is the one you worked on, number 7 is the one I'd look at first. Lets us know where you got the injector from.

Seven could be a faulty injector or a faulty install. Was the injector bolt hole fully blown out of possible oil, and are you confident in the torque wrench you used to tighten it? I would check the bolt first to see if it's loose, then pull the injector and check the integrity of the o-rings and the tip. A loose injector 7 could introduce compression gas into the fuel rail and disrupt the fuel flow to all others injectors on that circuit, 1,3 and 5.

It would be hard to say if there is any damage without a good running truck. But with the injector out a 5.5mm borescope adapter for your cell phone from Amazon would let you inspect the one part that could get hurt the most, the piston.

 

Injector was from FICM Repair. Im pretty sure I cleaned the bolt hole out good, i used a can of compressed air. I dont have any reason to think the torque wrench is off but I guess it could be, I torqued it to 26. Im going to start tearing into it tonight so Ill update when I have more info. Could it be the nipple cup orings or more likely something injector side?
Thanks

 

The nipple cup o-rings would just leak oil into the rocker box, not into the cylinder.

You can also have an internal failure of the injector, but that's rare.

 

You could try to vac test that inject

If copper washer was intact it would seem most likely bad inject

 

Good suggestion.

Peter has a good pressure test too, I just don't have that link.

 

So I got the #7 injector out, it did seem like hold down may have been a little loose. Going to get a new torque wrench before reinstalling. Orings look fine, tip looked fine no cracks or breaks but copper washer did not come out with injector, will have to try and fish that out tomorrow. Ordered one of the borescope adapters and it should be here tomorrow. You think its pretty safe to say issue was due to improper torque?

 

sorry forgot to ask, whats the best way to try and get the washer out of there? Cant see anything back there

 

When you pull #7 the condition of the O-rings will also tell you if it was installed at a low torque value.
The first one I did dumped me just past the on ramp for that very reason. Pulled the injector out and
what a mess.

Here is a easy way to check your torque wrench.

 

When you get the borescope you'll be able to use it to see better back there, and down the hole for the copper washer.

Sean's post is good for the smaller wrenches, here is another method....

 

Here are a couple pics of the injector. The bottom oring is pretty crusty but doesn’t look damaged to me. What do y’all think

 

Your copper washer was not sealing. It should not look like that at all.
If you're interested in my video that Jack mentioned above, heres the link. You'll see in my video what a good sealing copper washer injector with miles on it is suppose to look like too.

 

As Pete said, you’ve got combustion gases and carbon on the bottom section, a tell that the injector was loose. That would be the cause of the other injectors not getting proper fuel.

You are going to need injector bore brushes to clean out the bore sides and bottom. If you didn’t do that on the last injector install, that could have been the cause of this.

And replace the o-rings and of course the copper washer.

I got my injector bore brushes from XDP at a reasonable price.

 

Here is what the brush set look like. I have an injector cup in there for size comparison.

 

Did you get the copper crush gasket out yet?

To me it doesn't look like it had one on it. Seems like there would be scratch marks on the tips if the gaskets are stuck in the cup. If I remember correctly the copper gaskets have 3 tabs that grip the tips.