How To - Tuneup Tips
Things to Consider:
Why use dielectric grease on the top ceramic insulator?
One of the normal effects of operating a high voltage electrical system (like the ignition system on your vehicle) is the formation of a "corona voltage" on the external surface of the conductor (wires or insulators). As the voltage increases (as it does when a spark plug gets older and the gap wears larger), this "corona voltage" will increase. By using dielectric grease on the top ceramic insulator and lower edge of the wire or coil boot, this corona voltage is reduced and the plug will last longer before needing replacement.
Why use anti-seize compound on the shell threads?
With longer service intervals for spark plugs and the cold-hot-cold cycles that the spark plug endures during its service life, there is a higher probability that the threads will be more susceptible to seizing or binding when it is time to remove the plug. Using an anti-seize compound when installing the plugs will reduce or eliminate this binding. Be sure to check the recommendation of the manufacturer for the correct type of anti-seize compound. Different thread materials will require different compounds.
Why remove the insert in the spark plug socket wrench?
Applying a side force to a spark plug can cause internal damage. While the outside appears to be OK, inside there could be a crack in the ceramic or the seal may be compromised that would allow leakage and loss of cylinder compression and engine performance.
Copyright 2012 Capt'n Obveeus