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XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Black Powdery Substance in Spark Plug Cylinder

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  #21  
Old 12-07-2010 | 12:18 AM
bbarcher's Avatar
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From: San Antonio, TX
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Read this page, about "corona discharge"
http://www.ngkspark.com.au/sparkplug_tech.php#
 
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  #22  
Old 04-03-2011 | 05:53 AM
trentaiken's Avatar
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From: New Bern North Carolina
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Note: the material the cover is made of is an aluminum manganese alloy. It does polish up nicely
 
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