I just replaced injector # 3. It's not that bad of a job, a little tedious.
Just keep this in mind:
- The valve cover bolts snap pretty easily. I don't know what the torque spec is on them, but if you tighten them too much they will snap. I should know as I had one snap on me.
I takes some effort to turn over afterwards. The mechanic at the dealer told me to follow this procedure to turn it over after replacing injectors:
- Crank for 10 full seconds, then stop for like 2-3 seconds to give the starter a break. Then repeat. If you are replacing injectors on both banks, then it could take up to 30 full second. It took me about 15 seconds to turn it over after replacing only one injector.
This could be taxing depending on the condition of your batteries and how old they are, etc. Consider using another vechicle and jumper cables to keep you batteries charged during this procedure.
Also, when you drive it around for the first time, you need to purge the system of excess air. Drive your truck at 20 psi on your turbo gauge for a sustained period of time. This will do the trick!
If you are replacing injectors 1,3,5 or 7, your going to need to remove the intercooler pipe. On my test runs after replacing my injector, this pipe popped off a total of 4 times (and believe me, I tighten the hell out of it!) After posting for advice, I was told to use some 1500 grit sand paper and some hairspray was an effective fix. I am about to give it a try.
Good luck! Keep us posted and sorry if I sound like a broken record and you already know this stuff. : )