I've purchased the plugs, manifold gasket, pcv and I'm ready to go. I've changed many spark plugs on all sorts of vehicles, but I'm rather perplexed at one thought. I understand it, but wonder if it's a good idea.
In gathering the information that I need to "get the job done" I came across a Youtube video. Viewing it, the mechanic states that "Ford wants us to warm the engine up for a couple of minutes to aid in the release of the threads form the heads". The Duratec engines can have issue with spark plugs stripping the head threads.
I've more or less always changed spark plugs on engines that were cool. I'm guessing that Ford figures the expansion rate of aluminum and the spark plugs difference will aid in the release of the spark plug threads to the heads.
For those having performed changing your spark plugs on your Edge, or other Duratec 3.5 or 3.7 vehicle, what have you done? Cold or Warm? Have you noticed a difference? Am I just being "paranoid'?