Engine - Spark Plug Hole Thread Repair Procedure
TSB 07-21-210/29/07
4.6L 2V, 5.4L 2V, OR 6.8L 2V - SPARK PLUG
THREAD REPAIR PROCEDURE - NOT COVERED
UNDER NEW VEHICLE LIMITED WARRANTY
FORD:
1997 Thunderbird
1997-2004 Mustang
1997-2008 Crown Victoria
1997-1999 F-250 Light Duty
1997-2004 Expedition
1997-2008 E-Series, F-150
1998-2004 F-53 Motorhome Chassis,
F-Super Duty
2001-2005 Excursion
2002-2006 Explorer
LINCOLN:
1997-2007 Town Car
1998-1999 Navigator
MERCURY:
1997 Cougar
1997-2008 Grand Marquis
2002-2006 Mountaineer
This article supersedes TSB 07-15-2 to update the vehicle model years.
ISSUE
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.
ACTION
Follow the Service Procedure steps to correct the condition for non warrantable repairs.
SERVICE PROCEDURE
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.
NOTE
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.
NOTE
THIS PROCEDURE IS NOT AUTHORIZED AS A FORD WARRANTY REPAIR. FOR VEHICLES WITHIN WARRANTY, REPLACEMENT OF THE CYLINDER HEAD IS RECOMMENDED.
NOTE
THIS IS THE ONLY FORD AUTHORIZED PROCEDURE FOR SPARK PLUG THREAD REPAIRS.
NOTE
THIS PROCEDURE IS AUTHORIZED FOR ESP REPAIRS AND RETAIL REPAIRS.
WARRANTY STATUS: Information Only - Not Warrantable
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