[THEFERMANATOR]

Originally Posted by aussie

well i dont quite understand how a spark plug can break ----only alot of force can break it so if there tight why keep pushing till they break ---a bit of spray back and forth motion and some patence should get them out ---i see it as a spark plug and a aluminum head which is always a problem the only spark plugs i ever have problems with is from people cross threading them ----why is this desighn different from other engines

They are 3 piece spark plugs soldere together. It's a piss poor design at best, and it is VERY common to break one or two doing them. FORD gets about $400 to fix each one, and it is such a common issue that the price is listed out front on the board with the price of a tune-up.