I have taken very good care of my 04 Camry V6, and at 84000+ miles, it runs like new. However, I have not replaced the spark plugs, and I am concerned about the possibility of removing the plugs after being in the engine for that many years. I am reluctant to remove one of the front bank of plugs to find out, concerned that the head threads will come out with the plug, leaving me with no transportation. Comments appreciated.