5 Steps to Indexing an E3 Car Spark Plug
Basically, indexing a car spark plug faces the open gap of the plug’s ground electrode toward the direction for the optimal burn of the fuel mix in an engine’s combustion chamber. Although technical experts often disagree as to the actual performance enhancement attained by indexing a car’s spark plugs, it can’t hurt. In fact, with the price of gasoline skyrocketing in today’s economy, do everything possible to reduce the amount of raw fuel that escapes from your car’s engine is probably worth the effort.
Before you begin, you will need a spark plug wrench, a permanent marker and a pack of indexing shims. Almost any auto parts store that sells E3 car spark plugs should carry shim washers of differing thickness. It is also a good idea to check your car’s fuel mileage before you replace your car spark plugs for future comparisons. If you’re ready, let’s get started.
Step One – Use the spark plug wrench to remove the old plugs and purchase the correct E3 replacement plugs (see the Cross Reference Guide in the automotive section of the E3 Spark Plugs Catalog page on the company’s main website).
Step Two - This can require some detailed research but it is something you only have to do once (unless you change your engine’s head). To determine the location of the intake valves and exhaust valves in relationship to your car spark plugs will require a technical manual or a quick call to the service department of your local dealership. If all else fails, stop by any high performance speed shop and ask a professional.
Step Three – Scribe a vertical line with your felt marker from top to bottom on the outside of the ceramic insulator to denote the direction of the open end of the ground electrode. The idea is to orient the spark so the back side of the extending electrode does not block any part of the flame kernel from entering the combustion area. Some high performance engine builders prefer to orient the plug’s gap to face toward the exhaust valves while others recommend directing the spark at the opening for the intake valves. For your personal vehicle, just split the difference with the scribed line on your spark plugs and you should be fine. (more…)