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Spark Plug Torque?

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Old Jun 7, 2004 | 10:26 AM
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Spark Plug Torque?


My Haynes book indicates the proper spark plug torque is "84 to 168 in-lbs".
What is this in "ft-lbs"? Is it a simple matter of dividing by 12?
 
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Old Jun 7, 2004 | 10:37 AM
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Yes. 7 to 14 ft/lb
 
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Old Jun 7, 2004 | 06:00 PM
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I found it very tough to measure when installing the back plugs, with the swivel connected. I just cranked them down by feel.
 
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Old Jun 7, 2004 | 06:34 PM
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I was told the spark plugs in the V-10s were rated to last 100,000 miles. Was there a specific reason you changed them, or are you like me and don't chances?
 
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Old Jun 7, 2004 | 09:15 PM
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Ive read several threads that suggest changing them at 70,000. I haven't done it yet, but am seriously considering it if for no other reason than to just know it's been done. I haven't had the truck but a few months.
 
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Old Jun 9, 2004 | 10:44 PM
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I replaced mine at 80K just because I wanted to. They looked like they needed replacing. They had a pretty hefty gap. Torqued them down to wrist tight. My wrist 'clicked' so I know I was dead on.

Pete
 
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Old Jun 10, 2004 | 10:35 PM
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One grunt will suffice...

I know everyone says "foot lbs" or "inch lbs" but have you ever wondered why??? It should be lbs foot. Load first then the distance required to do the work...
 
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Old Feb 26, 2013 | 01:09 PM
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Wow, you do what you're talking about gmsux! For the rest of us torque is measured with a dead wight at a specific distance ford the center of the axis that is being torqued. IE one foot pound is a length of one foot and a weight of one pound hanging parallel to the earth.
John
 
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Old Feb 27, 2013 | 06:54 AM
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A link I keep on my desktop is this: Energy and Work Conversion - FREE Unit Converter Very cool for a lot of things--plug in your numbers existing or desired, units to be displayed and bingo, no math required!

General point though about plug---they barely last 50K miles and anything above that costs you MPG's. Have a look at a set supposedly with 65K miles:

Decide for yourself. FWIW I torque mine to about 22 ft/lbs or lbs/ft, also your choice but my torque wrench isn't that particular about such things! I do use nickel-based anti-seize too, also another option and/or choice.


HTH
 
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