The copper core has nothing to do with the electrical performance of the spark plug. A standard material spark plug uses a nickel-alloy that may include a small copper core. Copper is soft with a low melting point and cannot be used for electrodes, as they would wear very quickly. However, this terminology is incorrect, as standard material plugs do not have electrodes made from copper. вЂњCopper spark plugsвЂќ is a term often used to describe a standard material spark plug. Over torquing may cause any of the following: thread damage/breakage, compromised internal seals leading to gas leakage, metal shell stretch leading to poor heat dissipation and pre-ignition. An under-torqued spark plug can lead to excessive vibration and improper heat dissipation, causing spark plug and/or engine damage. Always follow the manufacturer recommended torque specification.

Torque is crucial in the ability of the plug to dissipate heat and perform properly. NGK also recommends adjusting the gap no more than +/- 0.008вЂќ from the factory preset gap. If the gap must be adjusted, use a tool that only moves the ground electrode and does not pry between or against the electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap. Care must be taken to avoid bending or breaking off the fine-wire electrodes. While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Corona stain is completely normal and should not be mistaken for exhaust gas blow-by or a broken seal inside the spark plug. Corona stain is created by the high voltage traveling thru the plug that attracts the dirt or oil particles surrounding the exposed ceramic insulator between the wire/coil boot and spark plug metal shell. It is completely unnecessary and can be detrimental.Д¬orona stain is a light brown or tan discoloration on the outside of the ceramic insulator above the metal shell/hex. Do not use anti-seize or lubricant on NGK spark plugs. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Thread breakage can sometimes involve removing the cylinder head for repair. NGK spark plugs are installed at the factory dry, without lubrication or anti-seize.ДЄnti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. The coating also acts as a release agent during spark plug removal. This silver or chrome-colored finish on the threads is designed to provide corrosion resistance against moisture and chemicals. NGK spark plugs feature trivalent plating. It is advisable to double check that the gap is correctly set to the vehicleвЂ™s recommended setting when installing spark plugs.5 Things You Should Know About Spark Plugs In the past, it was necessary to gap spark plugs, but today spark plugs are usually pre-gapped. Broken spark plugs could, you guessed it, cause misfires AND if pieces of the ceramic enter the cylinder, could cause far worse issues down the road.Дo pre-gapped spark plugs need to be gapped?Дo Spark Plugs Always Have to Be Gapped? Not always. Corroded spark plugs could halt the spark altogether and, again, cause misfires. Incorrectly gapped spark plugs could cause engine misfires. What happens if my spark plugs arent gapped correctly? The number after the вЂ“ indicates the recommended spark plug gap in tenths of a millimeter. The letter вЂњYвЂќ indicates a V-grooved center electrode. The letter вЂњVвЂќ indicates a fine wire gold palladium center electrode. The letter вЂњSвЂќ indicates a copper center core. The letter вЂњPвЂќ indicates a platinum center electrode. What does the P stand for on a NGK spark plug? The electrode has a small split on the end of it to help produce a better spark. They are the same plug, except the YA means it has a V-grooved center electrode. What is the difference between BR9ES and br9eya spark plugs? Thus, your NGK BR9ES is colder than a BR8ES. On NGK spark plugs, the lower the number the hotter the plug (higher numbers are colder). The heat range of a spark plug is indicated by the number in the plugвЂ™s identification sequence. What is the difference between BR8ES and BR9ES spark plugs? What is the factory gap for NGK Spark Plugs?

Are spark plugs pre gapped