Injector Leaking Again!

[jckleewein]

My back driver side injector is leaking again. The first time it leaked, I replaced the copper washer. Any ideas what might be going on?

JC

 

[S Phinney]

The wear plate is on the head wear the hold down sits and tightens down isn't it? If they are missing it could cause something like that or a defective hold down maybe.

 

[dmaxfireman]

when you replaced the washer did you clean out the injector bore?

 

[wes06dmax]

make sure the injector tip is tight make sure it is torqued down to 40 ft lbs

 

[jckleewein]

when you replaced the washer did you clean out the injector bore?

I just got down pulling the injector. The O-ring was blown out, and the entire injector was covered in soot. I did clean the injector bore out, but maybe I didn't do a good enough job. I will try to get a blue shop towel with a screwdriver down there to wipe it clean.

 

[jckleewein]

The wear plate is on the head wear the hold down sits and tightens down isn't it? If they are missing it could cause something like that or a defective hold down maybe.

Nope, the wear plate is still there. I will give everything a once over when I start putting everything back together.

make sure the injector tip is tight make sure it is torqued down to 40 ft lbs

I will double check.

 

[Burn Down]

I would bet that you didn't get it clean enough last time. I had one do the same thing, GM tech was in a hurry & didn't get all the carbon cleaned out of one hole. In the pic you can see the carbon in the face of the copper. Took me about 5 hours to get it pulled out. Anyway you need to make sure the bores are clean & free of carbon.
http://www.duramaxdiesels.com/forum/album.php?albumid=179&pictureid=1409

 

[jckleewein]

Is there anything that I should use to help remove the carbon buildup?

 

[02dirtymax]

brake cleaner and a 12ga shotgun bore brush work well

 

[Burn Down]

^^ That would work. I picked up the injector service kit off of ebay But it wasn't enough to get the carbon loose. I had to use a small Caterpillar bore brush that was pretty square & flat on the end. I then took a piece of very fine scotch brite & pushed it into the bristles so it was fairly flat on the end. Hooked it up to my air drill & very lightly buffed the bottom of the injector bore. If you go this route be extremly gentle with the drill & scotch brite it will eat aluminum in a hurry, just a couple of light taps & the bottom of the bore should look like new again. Brake clean the hole out, use a solvent gun to evac the brake clean and carbon out of the cylinder.

 

[jckleewein]

I will give the bore brush a try. Thanks for the suggestions!:hug:

 

[jckleewein]

Everything is put back together. Hopefully everything works this time.

 

[Burn Down]

If you got it clean you will be good to go.:thumb: