The letter “V” indicates a fine wire gold palladium center electrode. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. The letter “S” indicates a copper center core. It does not constitute any contractual term, representation or warranty. The “P” indicates a projected tip spark plug design (1.5 mm projection) that moves the spark deeper into the combustion chamber. It's a diesel engine, so it doesn't have a spark plug. Both of … The “P” indicates a projected tip spark plug design that moves the spark deeper into the combustion chamber. The letters after the heat range can indicate a number of things. The first step is removing the spark plug you want to look at. The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. It is best to use the heat range specified by the manufacturer. Rather, coil packs are used and the whole system is controlled by the computer. A spark plug is a device in the engine of a vehicle which produces electric sparks to make the gasoline burn. As such, Sparkplugs Limited takes no responsibility in respect of any claim whatsoever and howsoever caused arising from use of any information on this website. “P” indicates a 12 mm x 1.25 with a 1/2″ reach. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. Spark plugs require voltage in excess of 20,000 volts from a lower voltage battery. Normal spark plug. Before I get into describing these common conditions, let’s go over on how one would obtain such a … A worn spark plug not only wastes fuel but also strains the whole ignition system because the expanded gap (due to erosion) requires higher voltages. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. NGK is the largest manufacturer of spark plugs for motorcycles and ATVs in the world, and come as original equipment on many vehicles. This can help in identifying suitable replacement parts from NGK or even equivalent from other manufacturers. Now, I’m going to cover the 3 most common conditions, lean, normal, and rich. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. The letters “H” or “Y” indicate a projected tip. “H” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. The letters refer to the center electrode material, projection dimension and ground material. You must have JavaScript enabled in your browser to utilize the functionality of this website. The spark plug ceramic insulator nose length is the distance from the firing tip of the ceramic insulator to the point where the spark plug ceramic insulator meets the metal spark plug shell. If you find it difficult to read, click on the code to open in a larger window. Thread size, thread length, heat range, etc. Information and translations of PLUG in the most comprehensive dictionary definitions resource on the web. The number after the – indicates the recommended spark plug gap in tenths of a millimeter. Using NGK spark plug codes as an example, the code numbers may be BCPR6ES-11 or PFR6A-11A. Each cylinder has a spark plug and a piston. “W” indicates a 14 mm x 1.25 pitch size, “X” indicates a 12 mm x 1.25 size and “U” indicates a 10 mm x 1.0 size. If you find it difficult to read, click on the code to open in a larger window. These are generally a code that the manufacturer uses to designate the specifications of the spark plug. A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark. It is best to use the heat range specified by the manufacturer. The Denso Iridium spark plug does a lot to help the motorist. Below is Champion's spark plug part number decode. The letters “P” or “V” would indicate a platinum electrode. Spark plug codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. Note; Do not use a projected tip spark plug where it is not called for as it could contact the piston and cause catastrophic engine damage. The electrical voltage needed varies with different spark plugs. The first number (8 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. The letter “U” in this location would indicate a surface discharge gap (no ground electrode). Spark plugs in a gasoline engine have an additional purpose of … Denso Symbol Code. Take the spark plug in your hand and begin looking at it for signs of damage. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. This applies to standard copper, platinum and Iridium power plugs. Without knowing the manufacturer of the plug it is difficult to give more information. What these initials mean is that the red and blue cables carry the color information of the video signal. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs). The letter “A” indicates some type of special feature. It is possible, with care, to decode the construction of Champion sparkplugs. The wire runs from the top of the plug to the distributor, which is attached to the coil. Our listing a part does not guarantee its availability. Prices may be subject to change without notice. 1979 10th Aniv 400/4spd 1980 Black SE 301NA 1980 Indy Turbo Pace 301T 1981 Turbo 301T 1981 Black SE 301T 1981 Daytona Pace 301T www.301garage.com This website uses cookies to improve your shopping experience. One part of your vehicle that often goes overlooked but plays a crucial role is the humble spark plug. Here is an example of the Champion basic spark plug code. Copper plugs, for example, have the shortest life, while plugs made of more advanced and durable materials can provide up to four times the life of a copper spark plug. Below is Denso's spark plug part number decode. Normal spark plug More Information. Re: Y in spark plug code Standard projected core nose.Its referring to the center electrode and the distance projecting past the end of the threads.A plug too long would contact the top of the piston(possibly) causing damage.A different letter other than Y(like M) may refer to an extended tip/electrode (like a specialized racing plug),etc. Our listing a part does not guarantee its availability. However I will research for you. Once the voltage exceeds the dielectric strength of the gases, a spark jumps the gap at the plug's firing end. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. Here is an example of the Nippon Denso basic spark plug code. It is best to use the heat range specified by the manufacturer. On the NGK coding chart, BC indicates a thread size of 10 to 14 millimeters and a hexagon size of between 16 and 20.8 millimeters. Spark plug symbol codes; Spark plug symbol codes. Check for white or tan blisters. A normal spark plug will have brown or grayish-tan deposits on the side electrode. The second letter of the Champion spark plug code (in this case an “L”) indicates the thread size and reach of the spark plug. “A” indicates a 12 mm x 1.25 with a 3/4″ reach. Here are the most common spark plug codes by brand. The firing end is the end that the connected to the spark wire. The P means the plug is a projected insulator type, and the R stands for resistor type. The letter “P” indicates a platinum center electrode. Overlooked, that is, until they give out. There are three spark plug thread sizes currently being used in motorcycles and ATVs. What is a Spark plug? The “R” indicates a resistor type spark plug. Spark plug definition is - a part that fits into the cylinder head of an internal combustion engine and carries two electrodes separated by an air gap across which the current from the ignition system discharges to form the spark for combustion. Here is an example of their basic spark plug code. The letter “K” in this location would indicate a 3/8″ hex (wrench) size. Resistor type spark plugs reduce the amount of radio frequency interference (rfi) that can cause ignition misfires and static on the radio, if so equipped. A carbon-fouled plug will have black, dry soot on the electrodes and insulator tip. You may need to click again to zoom in depending on your web browser. How to read the spark plug condition and what the NGK part numbers mean . “L” indicates a 14 mm x 1.25 pitch size with a 1/2″reach. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. As such, Sparkplugs Limited takes no responsibility in respect of any claim whatsoever and howsoever caused arising from use of any information on this website. “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size. If there is no number at the end of the spark plug code, it should be gapped to .7 mm or .028″ unless specified differently by the vehicle manufacturer. Basic Spark Plug Operation; How Spark Plugs Wear; Other Factors That Can Affect Spark Plug Life; Opportune Times To Replace Spark Plugs; Spark plugs are a key ingredient of gasoline engines when it comes to serving up a dish of solid power. On devices with component video inputs and outputs, the connections may also carry the designations of Y, Pb, Pr or Y, Cb, Cr. There are three size spark plug threads and two reaches currently being used in motorcycles and ATVs. There are three size spark plug threads currently being used in motorcycles and ATVs. A -8 should be gapped to .8 mm or .032″, -9 should be gapped to .9 mm or .035″, -10 should be gapped to 1.0 mm or .040″ and -11 should be gapped to 1.1 mm or .044″. There are two size reaches currently being used in motorcycles and ATVs. Nearly all of the world's plug makers use a number-based code to designate heat range: foreign firms follow a system in which higher numbers mean colder plugs; American companies do just the opposite, assigning hotter plugs higher numbers. A -8 should be gapped to.8 mm or.032″, -9 should be gapped to.9 mm or.035″, -10 should be gapped to 1.0 mm or.040″ and -11 should be gapped to 1.1 mm or.044″. So far I have been able to figure out that this is an NGK spark plug The actual contact surface areas are going to be covered by the time you make contact. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. Below is NGK's spark plug part number decode. Generally speaking, a colder heat range is used under high temperature conditions such as racing, while a hotter heat range is used under colder climate conditions. Special Fasteners and Tightening Procedures. An 8 should be gapped to .8 mm or .032″, 9 should be gapped to .9 mm or .035″, 10 should be gapped to 1.0 mm or .040″ and 11 should be gapped to 1.1 mm or .044″. The letter “B” indicates two ground electrodes. In contrast, the green cable carries the black and white or "luminance" (brightness) portion of the video signal. It is possible, with care, to decode the construction of Denso sparkplugs. 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