If you click on the maintenance icon above it will bring you to a page that members post how to and other mechanical advice. Towards the bottom of that page Etron has written up the Duratec spark plug change. Also try a search on these forums and the archived forums if you need more info. The first thing I said when I bought my car and looked at the engine was "those rear plugs look like a sonofagun" luckily they dont have to be changed every 12k or so.