Taking the plunge: 5.4 Triton spark plug change

The big thing is to remove them on a warm engine (not hot). crack them loose, put some WD40 down the hole and let it soak into the carbon for a bit. when the carbon is cold it acts like cement and will not give which is what breaks the plug in the head!

The head/plug design is more than reason enough that I will never buy a 3valve triton..... well maybe if I did I would R&R the plugs about every 30k miles, clean them and put them back in.