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2007+ Expedition & Navigator 2007, 2008, 2009 and 2010 Ford Expedition and Lincoln Navigator

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Old 07-18-2008, 04:39 AM
2005X 2005X is offline
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Differences between Navigator and Expy 5.4L?

In doing some research on a new or slightly used Expy EL, I discovered the Navigator L, didn't know they made a stretch version. Anyway, also noticed the torque peak on the Navigator (at least for 2006 model) is reported to be lower in RPM band than the Expedition. Also, Lincoln suggests premium fuel, and don't thinkg the Ford does. So, what's the difference in these engines? Can you run reg or mid-grade in the Navigator?

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Old 07-18-2008, 10:28 AM
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No dif. Designed for 87 octane.
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Old 07-18-2008, 01:09 PM
montecarlo31 montecarlo31 is offline
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what he said x2
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Old 07-18-2008, 09:56 PM
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Ahhh, thanks.

After seeing your replies, I noticed I was looking at previous years Navigators, like 2004/5. On msnautos.com, the stats section showed the peak torque lower rpm (1k lower to reach peak torque for the Navi than the Expy, but the review also said the manual suggests running the Navi on 91 Premium, but they didn't have any issues w/ mid-grade 89. Now that I went and looked up 2008 - it's the same peak torque and @ same RPM as in the Ford, so if there was a diff in the motors it was prior models, like 2005 or older.

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Old 07-19-2008, 06:00 PM
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Price........
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Old 07-22-2008, 01:13 AM
brandon4 brandon4 is offline
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The navi had a 6 speed auto back to I believe 04-05. This would explain the torque rpm. They also (I think) had a dual overhead cam. Any thoughts?
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Old 07-22-2008, 07:54 AM
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The Navigators had a DOHC engine and the Expy had a SOHC engine
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Old 07-22-2008, 07:54 AM
 
 
 
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