Ok, so I’ve just removed my injectors and I may be in for more than I bargained for. I’ve got rust, dirt and coking to battle and I’m not sure how to deal with it. It seems that the coking didn’t infect my injectors at all, rather, it all stayed in the pre-cups and combustion chamber. The worst I had to deal with on the injectors was some rusty threads. At first, I thought this was great. My injectors looked good and really didn’t need much more than pop testing and some shims.
The injector holes in the head are a completely different story, though. I’m really not sure how to deal with it. They are full of rust, carbon and plugged with coking. It seems like mist of it will scrape off which is a good thing, but the part that really worries me is what I can’t see.
Check out the video I made with an endoscope. It may not be a good idea to watch full screen if you get motion sickness, so bear with me.
As you can see, they look pretty nasty. What gets me the most, though, is seeing how the coking built up around the injector tip. I don’t understand how it doesn’t seem to have really affected the injectors. I had assumed that the coking issue would be limited to buildup around the tip of the injector similar to this picture:
As for now, I will be brainstorming ways to remedy this while I rebuild my injectors. Any suggestions for cleaning, sans pulling the head, would be greatly appreciated. More updates will come as I progress through this.