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TSB Main Page
TSB
08-7-6
  • SPARK PLUG REMOVAL INSTRUCTIONS - 4.6L 3V/5.4L 3V/6.8L 3V
Publication Date: April 1, 2008

FORD:
2005-2008 Mustang
2004-2008 F-150
2005-2008 Expedition, F-Super Duty
2006-2008 Explorer, F-53 Motorhome Chassis
2007-2008 Explorer Sport Trac
LINCOLN:
2005-2008 Navigator
2006-2008 Mark LT
MERCURY:
2006-2008 Mountaineer

This article supersedes TSB 08-1-9 to update Vehicle Applications, Service Procedure and Part List.

ISSUE:

Some 2004-2008 F-150, 2006-2008 Mark LT, 2005-2008 F-Super Duty, Expedition, and Navigator, with 5.4L 3-V engine; 2005-2008 Mustang, 2006-2008 Explorer, Mountaineer, and 2007-2008 Explorer Sport Trac with 4.6L 3-V engine; 2005-2008 F-Super Duty, 2006-2008 and F-Stripped Chassis, with 6.8L 3-V engine may experience difficulty with spark plug removal. This may cause damage to the spark plug and leave part of the spark plug in the cylinder head. Affected engine build dates are as follows: 5.4L 3-V and 6.8L 3-V before 10/9/07, 4.6L 3-V before 11/30/07.

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