1997 Cougar 1997-2008 Grand Marquis 2002-2006 Mountaineer
This article supersedes TSB 07-15-2 to update the vehicle model years.
Some 1997-2008 vehicles equipped with a 4.6L 2V, 5.4L 2V, or 6.8L 2V engine and aluminum cylinder heads may experience a spark plug port with stripped or missing threads.
Follow the Service Procedure steps to correct the condition for non warrantable repairs.
Ford Motor Company now authorizes LOCK-N-STITCH aluminum insert and tool kit as a proper repair procedure.
Follow the procedure included in the tool kit for using the tools and inserts. Tool kits and inserts can be ordered from Rotunda by calling 1-800-Rotunda (768-8632). Choose option two (2), part number 302-00001.
FORD MOTOR COMPANY HAS DETERMINED THAT REPAIRS MADE WITH THESE ALUMINUM INSERTS AND LOCK-N-STITCH TOOLS DO NOT AFFECT THE HEAT TRANSFER FUNCTION BETWEEN THE SPARK PLUG AND THE CYLINDER HEAD.
THIS PROCEDURE IS NOT AUTHORIZED AS A FORD WARRANTY REPAIR. FOR VEHICLES WITHIN WARRANTY, REPLACEMENT OF THE CYLINDER HEAD IS RECOMMENDED.
THIS IS THE ONLY FORD AUTHORIZED PROCEDURE FOR SPARK PLUG THREAD REPAIRS.
THIS PROCEDURE IS AUTHORIZED FOR ESP REPAIRS AND RETAIL REPAIRS.