Plug gaps erode with with usage. Today's high energy ignition systems will fire plugs with gaps approaching .080-.100 gap. This puts tremendous strain on the ignition system and is usually the reason for failed coil packs etc. A plug that should fire around 40,000 volts that's now requiring 80,000 volts to jump an eroded gap is nothing but potential trouble. + Most cylinder heads are aluminum now days, and you stand a very real chance of the plug corroding to the head which, when it breaks trying to remove it is a real mess. Change often, and anti sieze the threads. I very seldom let anything exceed 20,000 miles. 35 years teaching post secondary automotive in MN Voc schools lets you see EVERYTHING, believe me.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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