Spark plugs are pretty much a universal thread, with some exceptions of course. Spark plug thread chasers are available in most good auto part stores, check the Lisle tool aisle, I think you'll find one there. Warmest wishes for the Season to all my 300 friends! Bob J From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Ronald Kurtz Sent: Saturday, December 24, 2011 6:17 AM To: chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Spark plugs Hello, everyone: During reassembly of engine, drive chain and other parts, I always chase all threads to help assure proper bolt and nut torque with appropriate taps and dies. J10Y plugs are specified as 14mm, according to the shop manual. Can anyone recommend the correct thread pitch to clean out the threads for the spark plugs in the cylinder heads? Best, Ron Kurtz E #292 [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/