So, my crew cab dually that I purchased brand new in 05 threw a code that the #2 glow plug was dead so today I went out to replace it. Used penetrating oil as recommended and it came out fairly easily. The new Autolite glow plug however took a bit of persuasion to get in to where the threads would pull it in. After installing it I noticed while trying to get the retainer nut back on the electrical lead that there was a tiny bit of motion and that scared me so I pulled it back out to use another new glow plug only the electrode stuck in the head. Now it looks like the entire top end of the motor is coming off to freshen it with only 147K miles on it. Breaks my heart but I don't know what else I could do. Am I just the lucky one or what?