1970boss302 Posted September 21, 2011 Report Share Posted September 21, 2011 What can be done it the spark plugs on the Shelby GT500 so they don't break off when trying to remove them ???? Link to comment Share on other sites More sharing options...
shel-b001 Posted September 21, 2011 Report Share Posted September 21, 2011 What can be done it the spark plugs on the Shelby GT500 so they don't break off when trying to remove them ???? If you are removing them make sure you blow out the cavity & then you could spray some penetrating oil on them but you shouldn`t have to. When you install the new ones apply copper based never seize on the threads. Link to comment Share on other sites More sharing options...
Justin00Stang Posted September 22, 2011 Report Share Posted September 22, 2011 The 5.4 4v still uses an old style plug, so there is no issue like the 04-early 08 4.6 3v. Link to comment Share on other sites More sharing options...
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