Rebuilding injectors

[ak diesel driver]

So I'm finally getting around to getting set up to rebuild injectors. Still trying to come up with a good source for shims,but I can make my own thin ones now.
So far it appears that an .005 shim raises the pressure approximately 300 PSI, which is about what I want to be above the stock pressure.

 

[ak diesel driver]

My high tech shim containers Anybody got a suggestion for a good product to soak injector parts in to remove carbon?

 

[1994ch]

My high tech shim containersView attachment 49462 Anybody got a suggestion for a good product to soak injector parts in to remove carbon?

hopes #9

 

[3500GMC]

I used my carburetor dip. It's a gallon can with a basket, not the spray kind.

 

[ak diesel driver]

I tried the Hoppes but it's a little thicker than I like and seems to leave a residue of oil. I also tried some carb cleaner and it seemed to work about the same but without the residue.

 

[3500GMC]

 

[3500GMC]

^After a soak overnight, rinse off your parts in hot water. Usually don't need any elbow grease. Stuff is pretty aggressive when new so may not need an overnight soak. It'll eat the plating off stuff if you forget it.

 

[ak diesel driver]

Yep I have a similar can somewhere

 

[ak diesel driver]

Spent most of the day making shims. But I did get 3 injectors done. Worst one I had to stack 4 shims,3 -.005 and 1 -.002. the other 2 where good with 1- .005. Not sure why that one took so much more.

 

[ak diesel driver]

I think I'll mark that one and put it at an easy to get to location so I can pull it after awhile and see if it changes.

 

[Will L.]

Tension of the springs generates the difference.
Along with deck thickness

 

[Will L.]

If you get one really light and one really strong, try swapping spring and two halfs of injector body.

 

[ak diesel driver]

I'm not really too concerned but I have read elsewhere that some say you shouldn't stack shims, so I'd like to find out if there are any issues in doing so.

 

[deejaaa]

what are you using and how are you making your shims?

 

[ak diesel driver]

Brass shim stock. If you look in the first picture at the far left you need see the tool I'm using.

 

[Will L.]

Where AK Driver is at, there is no bio diesel. But for future readers wanting to rebuild their injectors:

No red metals such as brass,bronze, or copper with biodiesel, methonal or ethonal. It causes metal corrosion, and contamination of the fuel.

In the injectors would be particularly bad.
Steel, stainless steel are your go to metals.

I have friends and cousins living in different parts of AK where they do have it, so not a "pass" for all of AK.

 

[ak diesel driver]

which parts Will?

 

[Will L.]

Any parts in contact with fuel. Other
metals like aluminum just corrode a bit, but red metals have some crazy reactions depending on fuel.

Magic answer is steel wins.

 

[ak diesel driver]

LOL no Will what part of AK?

 

[Will L.]

Hahaha! Down to the bottom left. Something about a panhandle. Cant remember names of the towns right now.