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TSB Main Page
Publication Date: April 13, 2009

2003-2005 Excursion
2003-2007 F-Super Duty
2004-2009 E-Series

This article supersedes TSB 08-11-3 to update the Service Procedure, which includes the release of a new Oil Cooler Service Kit. The Oil Cooler Service Kit includes a serviceable heat exchanger, which is to be used to service a restricted oil cooler. Replacement of the entire Oil Cooler assembly due to flow restriction is no longer necessary.


Some 2003-2007 F-Super Duty, 2003-2005 Excursion and 2004-2009 E-Series vehicles, all equipped with a 6.0L engine, may exhibit:

  • Coolant venting from the degas bottle cap
  • Internal engine coolant leak (possibly resulting in a hydro-locked engine)
  • White smoke from tail pipe
  • Coolant loss
  • Lacks power due to overheating
  • No cabin heat

The conditions typically occur when operating the vehicle under a load such as trailer towing, uphill driving, or both.


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