2003 3. O
3.0l Vulcan engine got new redesigned heads in 1999.
One of the changes was downsizing the valves from 8mm to 7mm, many think this is when the problem with valve seats started.
Ford's TSB(technical service bulletin) only covered 2004-2006 Rangers, but any 3.0l '99 to '06 could see this problem
One of the changes was downsizing the valves from 8mm to 7mm, many think this is when the problem with valve seats started.
Ford's TSB(technical service bulletin) only covered 2004-2006 Rangers, but any 3.0l '99 to '06 could see this problem
Last edited by RonD; Apr 24, 2015 at 11:00 AM.
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