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Altima Nissan Altima Sedan Discussion Forum

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Old 01-11-2017, 10:53 PM
jcg0324 jcg0324 is offline
Enthusiast
2011 Altima Sedan
2011 Altima 2.5s
 
Join Date: Jan 2016
Location: Philadelphia
Posts: 41
Default Spark Plugs

Spark plugs lasts much longer now than 40 years ago. Iridium and other rare exotic materials are one reason. I will have to replace them someday and the manual says about 100,000 miles. But it doesn't mention how to torque them.
After researching here is what I found.
The torque depends on 2 things. #1 ... aluminum cylinder head or iron cylinder head
and #2. diameter of the spark plug measured at the threads.
In my case 2011 Altima 2.5 s I measured 12 mm spark plug thread diameter.
Aluminum cylinder head
The part number is : DILKAR6A-11 and is an NGK spark plug.
The gap when new is supposed to be right. Correct torque may be indicated on the package.
torque for mine is indicated as 10.8 - 14.5 ft lbs. so I set my wrench to 12 ft lbs and was satisfied with that.
Don't use any lubricant or anti-seize compound on the threads as this will distort the torque.
Make sure the threads are clean.
These spark plugs are not cheap I think about $16.50 each. WOW
Install them right and sleep well.

Last edited by jcg0324; 01-14-2017 at 06:17 PM.
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