Posted on 4/28/2011
Some 2004-2005 Ford F-150 and 2005 F-Super Duty, Expedition, and Navigator vehicles with a 5.4L 3-valve engines may experience difficulty with plug removal. This may cause damage to the spark plug and leave part of the spark plug in the cylinder head, requiring an expensive extraction process, and in some cases, even cylinder head removal or replacement. [caption][/caption] There are special procedures Ford has recommended in a Technical Service Bulletin (TSB) that may reduce the number of broken plugs. Unfortunately in the real world, many still break because the spark plugs were not changed early enough. Ford, like many manufactu ... read more