Injector problem

[LB7_01DURAMAX]

I put some reman 30% over injectors in my truck from Lincoln diesel in 2015, since then I have only put 30k on the truck. Religiously changed fuel filters and ran hot shots secret additive. I got truck out a couple weeks ago and changed oil and has fuel in oil. So I pulled valve covers and ran the truck with some dye in the fuel filter and number 6 injector is leaking up past the solenoid in between the nut and solenoid. Anyone had that problem? Cracked body? I would assume it is the updated body since I bought them in 2015. Never noticed fuel in oil last year. Also I only drove truck maybe 60 miles before I changed the oil this year.

 

[Yngdmax92]

Contact Brent and see if he can help you out.

 

[LB7_01DURAMAX]

Contact Brent and see if he can help you out.

I have tried calling 3 times no techs or anybody other then sales people answer

 

[2004LB7]

have you tried torquing the solenoid nut down? I've removed and reinstalled the solenoid many times and never had it leak. didn't take much torque

 

[PureHybrid]

have you tried torquing the solenoid nut down? I've removed and reinstalled the solenoid many times and never had it leak. didn't take much torque

What seals it? Diagrams make it appear to have orings, which I don't see how being slightly under torqued would cause a leak

 

[2004LB7]

take a look at this thread of mine on another site from a few years ago. https://www.dieselbombers.com/lb7-performance/111843-duramax-lb7-injector-disassembly.html you can see in the nut an o ring that seals against the solenoid but nothing for the solenoid to the injector body. If I remember right it was just locetite on the threads. this is the low pressure or return side of the injector so it shouldn't take much to keep it leak free. maybe there is restriction in the return causing excessive pressure and leaking?

 

[PureHybrid]

Looks like there's an oring on the body where the bottom of the nut would engage too. I have a hard time believing these orings would leak before anything else in the system if there was a restriction downstream

 

[2004LB7]

Looks like there's an oring on the body where the bottom of the nut would engage too. I have a hard time believing these orings would leak before anything else in the system if there was a restriction downstream

good catch. yeah there is another o ring on the body just below the threads that the nut seals too. probably easiest to just replace those o rings and see if it stops

 

[PureHybrid]

good catch. yeah there is another o ring on the body just below the threads that the nut seals too. probably easiest to just replace those o rings and see if it stops

When you removed the retainer nut for the solenoid, was there much spring pressure? He was debating on trying to fix it without removing from the engine, or at least check to see if one of the orings were torn.

 

[2004LB7]

no pressure by the time you run out of threads. really easy. I replaced two solenoids in mine with the injectors still in the truck. the thread below I explain how to remove and install the solenoid in the truck

LB7: - #1 injector shorted

I swapped out three on my LB7. Ran great with good balance rates after. Keep all of the small parts, etc below the solenoid in place and only swap the coil. After unscrewing the solenoid, carefully lift it straight up and all of the other parts should remain. If you are not comfortable...

www.duramaxdiesels.com

 

[LB7_01DURAMAX]

no pressure by the time you run out of threads. really easy. I replaced two solenoids in mine with the injectors still in the truck. the thread below I explain how to remove and install the solenoid in the truck

LB7: - #1 injector shorted

I swapped out three on my LB7. Ran great with good balance rates after. Keep all of the small parts, etc below the solenoid in place and only swap the coil. After unscrewing the solenoid, carefully lift it straight up and all of the other parts should remain. If you are not comfortable...

www.duramaxdiesels.com

Did you not have the right size socket to remove it? Is that why you made that tool? Or is it not a 12 point nut?

 

[2004LB7]

Did you not have the right size socket to remove it? Is that why you made that tool? Or is it not a 12 point nut?

it not a 12 point. more like a 15 point or something odd

 

[LB7_01DURAMAX]

it not a 12 point. more like a 15 point or something odd

Oh ok. I have looked to see if they just made a socket but I haven’t had any luck finding one.