#4 injector went south on me. I replaced it with a BWD Rebuilt injector from Advance Auto around 6 weeks ago. Truck ran fine for a few weeks. A couple of weeks ago, it start missing bad a mile or so from my house. The next morning, I started it back up and it ran great. I cleaned the EGR and took it to work. The truck ran great when cold, but when the oil temp got over 170°, it started missing badly again. I got a code for cylinder contribution #4, the injector I just replaced. I parked the truck at work. Luckily I have an old beater car.
Misses when hot
Cyl 4 contribution code
Random "pops" heard in exhaust, followed by brief puff of black smoke.
I figure if it runs great cold, it's likely not mechanical, so let's swap the injector out. Today I got a chance to take the valve cover off and removed injector #4. Upon removal, I discovered that one side of the injector coil assembly was not attached to the injector body. The through bolt that holds everything together was BROKEN. Most likely this was due to overtorque on the bolt when the injector was rebuilt. Part of the through bolt remained in the injector, the other part (with the nuts) is lost somewhere in the engine.
Obviously I need a new injector. However how concerned should I be about further damage to the engine with part of the through bolt and nuts floating around who knows where. I fished around the rocker box with a magnet, didn't find anything, but it would be easy for small fragments to hide in there. If it somehow made its way down the oil pan, I guess no real harm (other than a pain in my butt), but how do I know that's where it is?
The injector I installed was a BWD reman from Advance Auto. I'm talking with their store manager tomorrow at lunch time. Basically, I need a little advice on what the best course of action should be. Just install a new injector and move on with life? Tow the truck to PowerStroke Specialties (less than a half hour from where the truck is) and have them diag?