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Spark plug replacement

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Old May 6, 2017 | 07:24 PM
  #1  
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Geo41
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From: New Berlin Wi.
Spark plug replacement

I have a 2008 Explorer V8 build date Feb 2008. Don't know the engine build date...I'm going in circles trying to figure a plug change. Latest I have read is after nov 2007 there should be no problem, new head design and plug design, so I should not have problem? I looked on the forum for advise and couldn't find it. I have run Techron through it twice, 1oz per gallon, or a little richer, thinking to do it again. And use top tier gas. Will the breaking plug thing be a possibility? Does the build date of truck usually come anywhere near build date of engine?
 
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Old Sep 20, 2017 | 03:09 PM
  #2  
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Geo41
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From: New Berlin Wi.
Sp 509 plug

Originally Posted by Geo41
I have a 2008 Explorer V8 build date Feb 2008. Don't know the engine build date...I'm going in circles trying to figure a plug change. Latest I have read is after nov 2007 there should be no problem, new head design and plug design, so I should not have problem? I looked on the forum for advise and couldn't find it. I have run Techron through it twice, 1oz per gallon, or a little richer, thinking to do it again. And use top tier gas. Will the breaking plug thing be a possibility? Does the build date of truck usually come anywhere near build date of engine?
Just found out from ford it takes a SP 509 plug, so thinking should be no problem...anybody know anything about changing this plug?
 
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Old Sep 21, 2017 | 08:06 PM
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Who told you that plugs break in an Explorer ?
 
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Old Sep 21, 2017 | 09:35 PM
  #4  
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Geo41
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From: New Berlin Wi.
Difficult to remove plug

Originally Posted by steve(ill)
Who told you that plugs break in an Explorer ?
https://repairpal.com/spark-plugs-ma...-to-remove-293. A new article out from ford says change them with a cold engine. I use Techron additive to clean the carbon out of the engine. Also from looking up engine build date it looks like I have the up dated heads and plugs.
 
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