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AC spark plug green Rings? #1339455 12/28/2019 5:49 PM
Joined: Aug 2017 Posts: 660 Big Springs CA S Shaffer's1950 'Bolter
Shaffer's1950 'Bolter S Joined: Aug 2017 Posts: 660 Big Springs CA	Hello Bolters, Can someone explain the green rings on AC spark plugs. 4 rings, one thicker ring ect? Thank you. Don, That explains the "GM" on one box re years produced. Thank you. Attachments 20191228_094732.jpg (346.88 KB, 173 downloads) 20191224_114603.jpg (214.39 KB, 174 downloads) Last edited by Shaffer's1950; 12/28/2019 6:15 PM. 1950 Chevy 3100

Entire Thread
Subject	Posted By	Posted
AC spark plug green Rings?	Shaffer's1950	12/28/2019 5:49 PM
Re: AC spark plug green Rings?	2-Ton	12/28/2019 6:08 PM
Re: AC spark plug green Rings?	Wrenchbender Ret.	12/29/2019 3:09 PM

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