The letter “V” indicates a fine wire gold palladium center electrode. 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″. Spark plug resistors operate in the range of about 5,000 ohms. Each cylinder has a spark plug and a piston. The firing end is the end that the connected to the spark wire. “A” indicates a 12 mm x 1.25 with a 3/4″ reach. “P” indicates a 12 mm x 1.25 with a 1/2″ reach. However I will research for you. 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 Normal spark plug. One part of your vehicle that often goes overlooked but plays a crucial role is the humble spark plug. It is best to use the heat range specified by the manufacturer. The Denso code provides a key to Denso spark plug features as described by the Denso part code NGK Plug types images and brief details of various types of plug from NGK such as Iridium IX, Platinum EVX, GV, G etc. 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. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. 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. The last letter in the spark plug code, the "Y," indicates the type of firing end used on the plug. The letter “Y” indicates a V-grooved center electrode. Information and translations of PLUG in the most comprehensive dictionary definitions resource on the web. Spark plug reach is the distance between the end of the spark plug threads and the seat or sealing surface of the plug. The letter “K” in this location would indicate a 3/8″ hex (wrench) size. Prices may be subject to change without notice. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. This can help in identifying suitable replacement parts from Champion or even equivalent from other manufacturers. The letters “IX” indicate an iridium center electrode. Here are the most common spark plug codes by brand. Denso Plug types images and brief descriptios of various parts from Denso including Iridium power and ZU platinum plugs. NGK is the largest manufacturer of spark plugs for motorcycles and ATVs in the world, and come as original equipment on many vehicles. A normal spark plug will have brown or grayish-tan deposits on the side electrode. 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. 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. JavaScript seems to be disabled in your browser. This website uses cookies to improve your shopping experience. This applies to standard copper and platinum plugs. Spark plugs in a gasoline engine have an additional purpose of … Plug reach determines how far the plug reaches through the cylinder head. Since the insulator tip is the hottest part of the spark plug, the tip temperature is the primary factor in pre-ignition and fouling. So far I have been able to figure out that this is an NGK spark plug 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″. You will likely see one of the following conditions. The “R” indicates a resistor type spark plug. References There are three size spark plug threads currently being used in motorcycles and ATVs. 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. There are additional decodes available for NGK US specification plugs. This applies to standard copper and platinum plugs. 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. It's a diesel engine, so it doesn't have a spark plug. The second letter of the Champion spark plug code (in this case an “L”) indicates the thread size and reach of the spark plug. You may need to click again to zoom in depending on your web browser. 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 letters “P” or “V” would indicate a platinum electrode. Reading spark plugs is an easy way to determine how an engine is running. Rather, coil packs are used and the whole system is controlled by the computer. It’s explicitly designed to improve performance, which is a big demand for any vehicle today. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. If spark plug reach is too long, the spark plug will protrude too far into the combustion chamber and the piston at TDC may strike the electrode. The letter “S” indicates a copper center core. The “-U” indicates that the ground electrode has a U groove made into it to provide a better initial flame kernel. 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 refer to the center electrode material, projection dimension and ground material. 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. Our listing a part does not guarantee its availability. When the piston reaches the top of its stroke, the spark plug emits a spark to ignite the fuel. The letter “A” indicates some type of special feature. More Information. “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. Thread size, thread length, heat range, etc. The letter “G” indicates a precious metal center electrode. If you find it difficult to read, click on the code to open in a larger window. Any white or light tan blisters with a bubbling look to them can … The letters “H” or “Y” indicate a projected tip. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. A carbon-fouled plug will have black, dry soot on the electrodes and insulator tip. Carbon fouled. These are generally a code that the manufacturer uses to designate the specifications of the spark plug. There are three size spark plug threads and two reaches currently being used in motorcycles and ATVs. 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). “N” indicates a 14 mm x 1.25 with a 3/4″ reach. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. This can help in identifying suitable replacement parts from NGK or even equivalent from other manufacturers. 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. “Z” indicates a 10 mm x 1.0 with a 1/2″ reach. Once the voltage exceeds the dielectric strength of the gases, a spark jumps the gap at the plug's firing end. You may need to click again to zoom in depending on your web browser. Read on … The letter “J” indicates a 12 mm x 1.25 size with two ground electrodes. Take the spark plug in your hand and begin looking at it for signs of damage. Here is an example of their basic spark plug code. 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. However I will research for you. Both of … You must have JavaScript enabled in your browser to utilize the functionality of this website. Spark plug is a electrical device present inside a IC engine. Below is NGK's spark plug part number decode. There are three spark plug thread sizes currently being used in motorcycles and ATVs. The wire runs from the top of the plug to the distributor, which is attached to the coil. Located somewhere in the lower part of the spark plug well, the O-ring seals’ function is to ensure that oil does not get to the spark plugs. Below is Champion's spark plug part number decode. The actual contact surface areas are going to be covered by the time you make contact. The letter “B” indicates two ground electrodes. The letters “GV” indicate a gold palladium center electrode. 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. The letter “Y” indicates a V-grooved center electrode. This is a high enough amount of resistance to cut down on ignition noises, but not so high that engine performance suffers. Thread size, thread length, heat range, etc. [YC] Firing End Design - The letters after the heat rating indicates a special spark plug construction feature called the firing end design. So far I have been able to figure out that this is an NGK spark plug “G” indicates a 10 mm x 1.0 with a 3/4″ reach. “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. The number at the end indicates the recommended spark plug gap in tenths of a millimeter. How to pick the right spark plug for your engine, What is spark plug gap and how to gap a spark plug What is spark plug heat range? It does not constitute any contractual term, representation or warranty. Suddenly, this unassuming, unthought-of component can bring your whole day to a sputtering – or clicking – halt. The first number (8 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. It is possible, with care, to decode the construction of Denso sparkplugs. “H” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. Normal spark plug Follow these instructions on how to remove a spark plug. Overlooked, that is, until they give out. The letter “P” indicates a platinum center electrode. The letter “C” indicates a copper core. Without knowing the manufacturer of the plug it is difficult to give more information. The “P” indicates a projected tip spark plug design (1.5 mm projection) that moves the spark deeper into the combustion chamber. What these initials mean is that the red and blue cables carry the color information of the video signal. How to read the spark plug condition and what the NGK part numbers mean . On devices with component video inputs and outputs, the connections may also carry the designations of Y, Pb, Pr or Y, Cb, Cr. This can be caused by a dirty air filter, excessive driving at low speeds, too rich of a fuel/air mixture or idling your vehicle for too long. It is best to use the heat range specified by the manufacturer. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. The letter “G” indicates a fine wire nickel alloy center electrode. What does PLUG mean? 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. The letter “B” or “C” in this location indicates a spark plug designed for racing applications. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. In contrast, the green cable carries the black and white or "luminance" (brightness) portion of the video signal. The number after the – indicates the recommended spark plug gap in tenths of a millimeter. These are generally a code that the manufacturer uses to designate the specifications of the spark plug. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. The number (24 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. It is possible, with care, to decode the construction of Denso sparkplugs. 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. The letter “S” in this location indicates it is a standard (non-projected tip) type, while the letter “X” indicates a 2.5 mm projected tip. However, if you have a distributor-less ignition, you have no spark plug wires. It does not constitute any contractual term, representation or warranty. “L” indicates a 14 mm x 1.25 pitch size with a 1/2″reach. Any information provided on this website is for general guidance only. The “R” indicates a resistor type spark plug. Spark plugs require voltage in excess of 20,000 volts from a lower voltage battery. 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. 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. Most auto manufacturers suggest having new spark plugs installed about every 30,000 miles; however, spark plug longevity depends on the condition and type of spark plug. The first step is removing the spark plug you want to look at. Prices may be subject to change without notice. “F” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. 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. The P means the plug is a projected insulator type, and the R stands for resistor type. If you find it difficult to read, click on the code to open in a larger window. Look at end of the spark plug that was in the cylinder and examine it. Special Fasteners and Tightening Procedures. ... spark plug, sparking plug, plug (noun) electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark. 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. This applies to standard copper, platinum and Iridium power plugs. The “P” indicates a projected tip spark plug design that moves the spark deeper into the combustion chamber. The letter “P” indicates a platinum center electrode. The letters after the heat range can indicate a number of things. The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. There are two size reaches currently being used in motorcycles and ATVs. The Denso Iridium spark plug does a lot to help the motorist. Knowing which plugs are hotter or colder than the ones you presently have in your bike is easy if you're content to stay with the same brand. It is best to use the heat range specified by the manufacturer. Using NGK spark plug codes as an example, the code numbers may be BCPR6ES-11 or PFR6A-11A. yes, but plugs and sockets (in residential applications especially) are DESIGNED to not allow that arc / spark to be visible, because visible = potentially capable of starting a fire. Check for white or tan blisters. The electrical voltage needed varies with different spark plugs. Each spark plug is connected to a spark plug wire (in conventional and electronic ignitions). The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. Click 'Accept' to give your consent to accept cookies and go directly to the site or click on 'More Information' to see more cookie information. Mirage Spark plug Recommendations: (low boost=6psi-13psi high boost=14psi+) Brand - type - part# - stock# - gap 4G (1993-1996) 1.8 Standard: NGK V-Power BKR5E-11 # 6953 0.044 Turbo (low boost): Below is Denso's spark plug part number decode. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. 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. 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″. The number after the – indicates the recommended spark plug gap in tenths of a millimeter. What is a Spark plug? Our listing a part does not guarantee its availability. Now, I’m going to cover the 3 most common conditions, lean, normal, and rich. 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. Here is an example of the Champion basic spark plug code. Before I get into describing these common conditions, let’s go over on how one would obtain such a … Denso Symbol Code. Without knowing the manufacturer of the plug it is difficult to give more information. There are two size reaches currently being used in motorcycles and ATVs. It is possible, with care, to decode the construction of NGK spark plugs. Therefore, when this component is faulty, it paves a way for oil to pass through the valves and leak into the spark plugs. It is possible, with care, to decode the construction of Champion sparkplugs. Disclaimer: Any information provided on this website is for general guidance only. k This is often caused by over advanced ignition, timing, poor engine cooling system efficiency (scale, stoppages, low level), a very lean air/fuel mixture, or a leaking intake manifold. The letter “U” in this location would indicate a surface discharge gap (no ground electrode). Spark plug symbol codes; Spark plug symbol codes. Here is an example of the Nippon Denso basic spark plug code. Spark plug codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. Center electrode high that engine performance suffers in identifying suitable what does the y mean on a spark plug parts unless you are confident using. Goes overlooked but plays a crucial role is the humble spark plug gap tenths! 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