Since i had a spare LB7 injector laying around, and i consider myself adventurous, i decided to dismantle the injector down as far as possible

Because I haven't posted anything to meaningful in a while, I thought some of you might like to see the photos of this

Stock LB7 injector with an unknown number of miles on it.


the nozzle comes off quite easily


the needle valve comes out of the back of the nozzle with a gentle tap


here is a close up of the pintle


and the back of the nozzle


in this photo you can see some of the spray holes


to get an idea on how small the jets are, here is a measurement of the outside diameter of the nozzle


this is where the nozzle mates up to. the two prongs keep it centered and aligned.


and of course the parts that are in it


there is still more inside it but they come out from the other side


this is the other side. the solenoid removed


this spring sits inside the hole in the center of the solenoid


the top of the solenoid where the wires connect. i have know idea what the numbers mean


some sort of contraption sits under the solenoid. i believe that this is the part that the solenoid pulls up on to allow the fuel to flow


this part lifts out easy. the right side of the photo shows a small "cup" and bearing (ball) that sits under this contraption


this one is tricky to take apart. you have to lift the spring and slide the retainer out from under it. here i have it pulled out half way

 

once that is out, push down on A and slide retainer B out


then it all comes apart


back to the injector body, now a 10mm hex wrench is used


this is where the ball seat resides


close up of ball seat


without the ball


with the ball. on the revised design from bosch this seat and ball are supposed to be chrome plated.


this is how small the check ball is


to remove the fuel fitting, remove the pin and unscrew


with everything removed you can now see into the body of the injector


all of the parts


now this wouldn't be complete without a cutaway


i hoped you enjoyed this

Jason