Spark Plug gap and Torque Specs for 1999 5.4

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#16

04-22-2013, 08:37 PM

shapleigh

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Quote:

Originally Posted by Shernius

Figured the factory setting held up for 100,000 miles and they were very tight. The threads looked great so I torqued them to 170 in-Lbs.

did you use ant-seize?
14ft/lbs=168in/lbs which is the standard for these motors '97-'02, I would use a light coat of anti-seize personally.

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#17

04-23-2013, 05:47 AM

Shernius

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Went 170 in-lbs dry. I also check the plugs once a year to make sure they are not loosening up but I guess I can stop now since they haven't.

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#18

04-01-2015, 09:05 AM

tvl

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Correct Spark Plug Torque Setting

I have a Ford Expedition that was purchased new and is just now turningover 100K miles. Therefore, I want to replace the plugs and coils. After much readingand research I feel I am ready to begin; except for onedetail. The Ford manuals and most individuals online state that the correcttorque for the spark plugs is between 80 and 168 inch pounds (7 – 14 ft/lbs). Ijust recently purchased a torque wrench to ensure the plugs were torquedproperly. Then I come across a couple of online sites that state the torquesetting is not enough and has been changed to 26-30 ft/lbs.

Who is correct?
Hasthis spec been changed from what the Ford manuals indicate?

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