Can You Put Copper Grease On Spark Plugs?

Can You Put Copper Grease On Spark Plugs? NGK does not recommend the application of lubricant such as copper grease to spark plug threads as the result is a reduction of frictional forces at the thread faces. It’s very important not to over or under tighten spark plugs during installation. Over tightening can lead to … Continue reading Can You Put Copper Grease On Spark Plugs?