<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>On Nov 14, 2016, at 11:15 PM, John Jaranson wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Nov 14, 2016, at 11:04 PM, Keith Park wrote:<br><br><blockquote type="cite">65K! WOW John!<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Generally, in the old days, 15K you replaced the plugs.<br></blockquote><blockquote type="cite">The GM HEI ignitions systems would jump quite the gap and wore the plugs<br></blockquote><blockquote type="cite">down to what Jim described and still ran at 60Kmi or so.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">John, send us a picture of your "Worn knubs" when you get them out.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">:-)<br></blockquote><br>I plan to document the whole process. I will be sure include pictures of what I find as I go through it.</div></blockquote><div><br></div><div>I pulled Sophy's engine yesterday in preparation her freshening over the winter. I pulled the spark plugs and took some pictures. These are Bosch W8AC plugs with over 60,000 miles on them. 3/4 side look really good. 1/2 are a bit more sooted up but the electrodes themselves look fine. All the gaps were still good. Sophy's rough running is likely explained by whatever is causing the poor combustion on the 1/2 side. Further investigation is needed.</div><div><br></div><div>Here is a link to a picture showing each of the plugs....</div><div><br></div><div><a href="http://www.carartbyjohn.com/2016VWStuff/SparkPlug60kMiles.jpg">http://www.carartbyjohn.com/2016VWStuff/SparkPlug60kMiles.jpg</a></div><div><br></div><div>I am definitely impressed with the Bosch plugs....not even close to being "worn knubs"</div><div><br></div><div>BTW, Sophy is running standard point ignition with a stock black 12V coil. Nothing special on that side of things.</div><div><br class="webkit-block-placeholder"></div><div>
<div><div>Later,</div><div>John Jaranson</div><div><a href="http://www.carartbyjohn.com">www.carartbyjohn.com</a></div></div><div><br></div><div><br></div></div></body></html>