Spark plug Troque spec for 2.5L - Toyota Nation Forum : Toyota Car and Truck Forums
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post #1 of 43 Old 05-19-2019, 09:50 AM Thread Starter
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Spark plug Troque spec for 2.5L

I changed the spark plug yesterday and I troque them to 13 ft pound. Is this right? I bought ngk 96779. I did checked the gap on the new plugs and I found only one of them was at .43
I did not adjust the gap on that one because I didnít know how to adjust them so I went ahead and install them with 13ft pound.

Do I need to worry about about gap at .43?


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post #2 of 43 Old 05-19-2019, 12:02 PM
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Quote:
Originally Posted by cmary14.5 View Post
I changed the spark plug yesterday and I troque them to 13 ft pound. Is this right? I bought ngk 96779. I did checked the gap on the new plugs and I found only one of them was at .43
I did not adjust the gap on that one because I didnít know how to adjust them so I went ahead and install them with 13ft pound.

Do I need to worry about about gap at .43?


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I never depend on plugs being gapped correctly straight out of the box. It is best to get a gapper and do it yourself.

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post #3 of 43 Old 05-19-2019, 12:35 PM
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Quote:
Originally Posted by cmary14.5 View Post
I changed the spark plug yesterday and I troque them to 13 ft pound. Is this right? I bought ngk 96779. I did checked the gap on the new plugs and I found only one of them was at .43
I did not adjust the gap on that one because I didnít know how to adjust them so I went ahead and install them with 13ft pound.

Do I need to worry about about gap at .43?


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From NGK
Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
As far as the Gap, lightly tap it to close or use a flat blade to open the gap up.
Considering most Torque wrenches only used occassionally are not calibrated correctly so I doubt you'll have any issues. As far as your gap question I guess it all depends on which direction it was out and by how much!
Usually the only problem I've seen is the life of the spark plug will be shortened.
Always check gaps and correct prior to installation as mentioned ans use an anti-seize on the threads
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post #4 of 43 Old 05-19-2019, 12:40 PM Thread Starter
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I thought Toyota call for 13 ft pound?


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post #5 of 43 Old 05-19-2019, 01:40 PM Thread Starter
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No one know specifications for spark plug?


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post #6 of 43 Old 05-19-2019, 01:43 PM
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No one know specifications for spark plug?


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Last I saw in a Toyota manual it said 150 inch lbs.
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post #7 of 43 Old 05-19-2019, 02:31 PM
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If engine power and throttle response seems softer and weaker than with the original plugs it's because the NGK plugs come gapped wider than the factory original Denso plugs and NGK says: "Do not change the gap on platinum, iridium or twin tip spark plugs, as the fine electrodes may get damaged."

You should have purchased factory original Denso plugs from a Toyota dealer packaged in a Toyota box because they come correctly pregapped for maximum power. Like these for the 4 cylinder engine: https://www.toyotapartsdeal.com/oem/...k-plug,,19100P
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post #8 of 43 Old 05-19-2019, 03:34 PM Thread Starter
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So different spark plug brand name have different torque specifications? Ngk 18 ft pound spec is too much than factory called for. 18 ft pound is for V6 engine not 2.5L .
12.5 ft pound sound right for 2.5L engine.


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post #9 of 43 Old 05-19-2019, 08:44 PM Thread Starter
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The only issue I have is vibration is more than my previous plug. Does wider ngk plug anything to do with this?


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post #10 of 43 Old 05-19-2019, 09:26 PM
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This is from NGK. Torque depends on the diameter of the plug threads. Also has instructions for those without a torque wrench, and for reinstalling plugs.
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post #11 of 43 Old 05-19-2019, 10:00 PM
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Good and tight with anti-seize.

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post #12 of 43 Old 05-19-2019, 10:28 PM Thread Starter
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Spark plug Troque spec for 2.5L

My plug is 14 mm so if I tighten them up to 18 ft pound is 25 newton meter. Wonít that mess up my cylinder?? Otherwise I will go buy factory Denso from Toyota plug n torque them to 12.5 ft pound.


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post #13 of 43 Old 05-19-2019, 10:41 PM
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Quote:
Originally Posted by cmary14.5 View Post
My plug is 14 mm so if I tighten them up to 18 ft pound is 25 newton meter. Wonít that mess up my cylinder?? Otherwise I will go buy factory Denso from Toyota plug n torque them to 12.5 ft pound.


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Unless you are tightening it with a 1/2" impact and holding the trigger, you don't need to worry about stripping and breaking spark plugs.

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post #14 of 43 Old 05-19-2019, 11:10 PM Thread Starter
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So I can tighten ngk plug to 18 ft pound with 3/8 torque wrench? If I buy Denso plug then I tighten them to 12.5 ft pound right if I go for Denso? Sorry for asking stupid questions I just wanted to make sure.


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post #15 of 43 Old 05-19-2019, 11:17 PM
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Tighten by hand first to make sure you don't have them cross threaded. Then use the socket to get them snug, and turn 1/4 more revolution. That will do it every time.

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