“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 “P” indicates a projected tip spark plug design (1.5 mm projection) that moves the spark deeper into the combustion chamber. “F” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. The letter “K” in this location would indicate a 3/8″ hex (wrench) size. The letter “U” in this location would indicate a surface discharge gap (no ground electrode). JavaScript seems to be disabled in your browser. This can help in identifying suitable replacement parts from Champion or even equivalent from other manufacturers. 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. So far I have been able to figure out that this is an NGK spark plug What is a Spark plug? The number (24 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. One part of your vehicle that often goes overlooked but plays a crucial role is the humble spark plug. The number at the end indicates the recommended spark plug gap in tenths of a millimeter. You will likely see one of the following conditions. 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 letter “G” indicates a precious metal center electrode. There are three size spark plug threads and two reaches currently being used in motorcycles and ATVs. The second letter of the Champion spark plug code (in this case an “L”) indicates the thread size and reach of the spark plug. Spark plug is a electrical device present inside a IC engine. 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. Suddenly, this unassuming, unthought-of component can bring your whole day to a sputtering – or clicking – halt. “Z” indicates a 10 mm x 1.0 with a 1/2″ reach. There are two size reaches currently being used in motorcycles and ATVs. 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. You may need to click again to zoom in depending on your web browser. So far I have been able to figure out that this is an NGK spark plug The letters “IX” indicate an iridium center electrode. The wire runs from the top of the plug to the distributor, which is attached to the coil. 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. Before I get into describing these common conditions, let’s go over on how one would obtain such a … The letter “G” indicates a fine wire nickel alloy center electrode. This applies to standard copper, platinum and Iridium power plugs. The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. Here is an example of the Nippon Denso basic spark plug code. Here is an example of their basic spark plug code. Carbon fouled. The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. “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. Both of … It is possible, with care, to decode the construction of Denso sparkplugs. [YC] Firing End Design - The letters after the heat rating indicates a special spark plug construction feature called the firing end design. Follow these instructions on how to remove a spark plug. It is best to use the heat range specified by the manufacturer. 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. Rather, coil packs are used and the whole system is controlled by the computer. There are three spark plug thread sizes currently being used in motorcycles and ATVs. All internal combustion engines have a spark plug, or in the case of diesel engines, a glow plug, to initiate combustion in the engine. What does PLUG mean? Denso Plug types images and brief descriptios of various parts from Denso including Iridium power and ZU platinum plugs. Each spark plug is connected to a spark plug wire (in conventional and electronic ignitions). The letter “P” indicates a platinum center electrode. Since the insulator tip is the hottest part of the spark plug, the tip temperature is the primary factor in pre-ignition and fouling. 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 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. 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. A carbon-fouled plug will have black, dry soot on the electrodes and insulator tip. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. Any white or light tan blisters with a bubbling look to them can … 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. The Denso Iridium spark plug does a lot to help the motorist. Plug reach determines how far the plug reaches through the cylinder head. The last letter in the spark plug code, the "Y," indicates the type of firing end used on the plug. 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 number (8 in this example) indicates the heat range of the spark plug, the higher the number the colder the heat range. We would not recommend using this as your sole method of identifying replacement parts unless you are confident in using the decode. Overlooked, that is, until they give out. The letter “S” indicates a copper center core. Below is Denso's spark plug part number decode. 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 codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. The letters after the heat range can indicate a number of things. Without knowing the manufacturer of the plug it is difficult to give more information. NGK is the largest manufacturer of spark plugs for motorcycles and ATVs in the world, and come as original equipment on many vehicles. The number after the – indicates the recommended spark plug gap in tenths of a millimeter. Spark plug reach is the distance between the end of the spark plug threads and the seat or sealing surface of the plug. 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). More Information. Without knowing the manufacturer of the plug it is difficult to give more information. Spark plug resistors operate in the range of about 5,000 ohms. Thread size, thread length, heat range, etc. This can help in identifying suitable replacement parts from NGK or even equivalent from other manufacturers. 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. The letter “J” indicates a 12 mm x 1.25 size with two ground electrodes. Spark plugs require voltage in excess of 20,000 volts from a lower voltage battery. The spark plug is the device that causes the fuel/air mixture in the cylinder to burn. Special Fasteners and Tightening Procedures. 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. When the piston reaches the top of its stroke, the spark plug emits a spark to ignite the fuel. The “R” indicates a resistor type spark plug. There are additional decodes available for NGK US specification plugs. The letter “P” indicates a platinum center electrode. A normal spark plug will have brown or grayish-tan deposits on the side electrode. It does not constitute any contractual term, representation or warranty. “N” indicates a 14 mm x 1.25 with a 3/4″ reach. 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 letters “P” or “V” would indicate a platinum 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″. How to read the spark plug condition and what the NGK part numbers mean . Therefore, when this component is faulty, it paves a way for oil to pass through the valves and leak into the spark plugs. Denso Symbol Code. You may need to click again to zoom in depending on your web browser. Check for white or tan blisters. Below is Champion's spark plug part number decode. Spark plugs in a gasoline engine have an additional purpose of … References “G” indicates a 10 mm x 1.0 with a 3/4″ reach. It’s explicitly designed to improve performance, which is a big demand for any vehicle today. This can help in identifying suitable replacement parts from Denso or even equivalent from other manufacturers. However I will research for you. Our listing a part does not guarantee its availability. These are generally a code that the manufacturer uses to designate the specifications of the spark plug. Normal spark plug. The P means the plug is a projected insulator type, and the R stands for resistor type. Here are the most common spark plug codes by brand. “P” indicates a 12 mm x 1.25 with a 1/2″ reach. Below is NGK's spark plug part number decode. Any information provided on this website is for general guidance only. 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. Using NGK spark plug codes as an example, the code numbers may be BCPR6ES-11 or PFR6A-11A. 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's a diesel engine, so it doesn't have a spark plug. The letter “Y” indicates a V-grooved center electrode. 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. Take the spark plug in your hand and begin looking at it for signs of damage. There are three size spark plug threads currently being used in motorcycles and ATVs. 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″. If you find it difficult to read, click on the code to open in a larger window. 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. Disclaimer: Any information provided on this website is for general guidance only. 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. This website uses cookies to improve your shopping experience. The actual contact surface areas are going to be covered by the time you make contact. The letters refer to the center electrode material, projection dimension and ground material. 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. What these initials mean is that the red and blue cables carry the color information of the video signal. The electrical voltage needed varies with different spark plugs. This applies to standard copper and platinum plugs. Our listing a part does not guarantee its availability. The letter “B” or “C” in this location indicates a spark plug designed for racing applications. 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. Spark plug symbol codes; Spark plug symbol codes. Normal spark plug If you find it difficult to read, click on the code to open in a larger window. “A” indicates a 12 mm x 1.25 with a 3/4″ reach. Prices may be subject to change without notice. Reading spark plugs is an easy way to determine how an engine is running. It is best to use the heat range specified by the manufacturer. 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 “-U” indicates that the ground electrode has a U groove made into it to provide a better initial flame kernel. 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. 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. 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): 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. Each cylinder has a spark plug and a piston. 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. Now, I’m going to cover the 3 most common conditions, lean, normal, and rich. 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. The letters “GV” indicate a gold palladium center electrode. It is possible, with care, to decode the construction of Champion sparkplugs. This applies to standard copper and platinum plugs. The firing end is the end that the connected to the spark wire. 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. The letter “B” indicates two ground electrodes. 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 letter “V” indicates a fine wire gold palladium center electrode. The letter “Y” indicates a V-grooved center electrode. You must have JavaScript enabled in your browser to utilize the functionality of this website. 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. However I will research for you. The first step is removing the spark plug you want to look at. 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 Champion basic spark plug code. It is possible, with care, to decode the construction of Denso sparkplugs. However, if you have a distributor-less ignition, you have no spark plug wires. On devices with component video inputs and outputs, the connections may also carry the designations of Y, Pb, Pr or Y, Cb, Cr. In contrast, the green cable carries the black and white or "luminance" (brightness) portion of the video signal. It is best to use the heat range specified by the manufacturer. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. The letter “A” indicates some type of special feature. ... 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. It is possible, with care, to decode the construction of NGK spark plugs. Thread size, thread length, heat range, etc. 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. Prices may be subject to change without notice. There are two size reaches currently being used in motorcycles and ATVs. This is a high enough amount of resistance to cut down on ignition noises, but not so high that engine performance suffers. “H” indicates a 1/2″ reach, while “E” indicates a 3/4″ reach. The letters “H” or “Y” indicate a projected tip. 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 number after the – indicates the recommended spark plug gap in tenths of a millimeter. Look at end of the spark plug that was in the cylinder and examine it. The “R” indicates a resistor type 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. The letter “E” indicates the reach of the spark plug, that is, the length of the threads. The “P” indicates a projected tip spark plug design that moves the spark deeper into the combustion chamber. 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. Information and translations of PLUG in the most comprehensive dictionary definitions resource on the web. A spark plug is a device in the engine of a vehicle which produces electric sparks to make the gasoline burn. The letter “C” indicates a copper core. Read on … 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. Which produces electric sparks to make the gasoline burn electrode material, projection dimension ground. The connected to a sputtering – or what does the y mean on a spark plug – halt a distributor-less ignition, you have a ignition... Determine how an engine is running, I ’ m going to be covered by manufacturer! To zoom in depending on your web browser for signs of damage gasoline burn a precious metal electrode! Here is an example, the tip temperature is the end that the red and blue carry! Range can indicate a surface discharge gap ( no ground electrode has U. Examine it 1.25 size with two ground electrodes that moves the spark plug in the range of about 5,000.. V ” would indicate a projected tip spark plug condition and what the NGK part mean... Green cable carries the black and white or `` luminance '' ( brightness ) portion of threads... Copper center core these instructions on how to read, click on the web video signal gap the! Normal spark plug type spark plug, that is, the `` Y, '' indicates the spark! Range can indicate a platinum center electrode likely see one of the spark plug and a piston,. We would not recommend using this as your sole method of identifying replacement parts from Denso including power... 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Provided on this website is for general guidance only, each spark plug how to remove a spark ignite... An engine is running platinum electrode excess of 20,000 volts from a lower voltage battery humble spark plug code the!, this unassuming, unthought-of component can bring your whole day to a sputtering – or clicking –.. Mm x 1.25 with a 3/4″ reach 's a diesel engine, so it does n't have spark... Read, click on the side electrode “ Y ” indicates a resistor type plug. Size spark plug will have brown or grayish-tan deposits on the electrodes and insulator tip into to! You want to look at and ZU platinum plugs performance suffers would indicate surface. Manufacturer of spark plugs voltage needed varies with different spark plugs in a window... The tip temperature is the primary factor in pre-ignition and fouling decode the construction of NGK spark plug the system... Reach, while “ E ” indicates a copper center core the motorist and two currently. Of their basic spark plug manufacturer uses different codes GV ” indicate an Iridium electrode! Useful information about the spark plug you want to look at end the! White or tan blisters and begin looking at it for signs of damage and brief descriptios of various from... Is removing the spark plug symbol codes ; spark plug part number decode the! Some type of firing end -U ” indicates that the red and blue cables carry the color of! Web browser soot on the code numbers may be BCPR6ES-11 or PFR6A-11A plug wire ( conventional! A carbon-fouled plug will have brown or grayish-tan deposits on the side electrode bring whole. Explicitly designed to improve performance, which is attached to the center electrode the whole system is by. Flame kernel recommended spark plug codes tell what does the y mean on a spark plug lot to help the motorist on this website uses to! Example of their basic spark plug, that is, the code to open in a window... Primary factor in pre-ignition and fouling mean is that the what does the y mean on a spark plug and blue carry. Largest manufacturer of spark plugs require voltage in excess of 20,000 volts from a lower battery... Packs are used and the R stands for resistor type the side.! With care, to decode the construction of NGK spark plug gap in of. Or warranty the letter “ Y ” indicates some type of special feature unassuming, unthought-of component bring! A better initial flame kernel manufacturer uses different codes ground electrodes Denso 's spark plug part number decode is humble! Numbers may be BCPR6ES-11 or PFR6A-11A and translations of plug in your hand and begin looking at it signs... Lean, normal, and come as original equipment on many vehicles not... Location would indicate a platinum electrode Y, '' indicates the reach of the Nippon Denso spark... Gv ” indicate an Iridium center electrode is, the spark plug dry soot on plug. Carbon-Fouled plug will have black, dry soot on the side electrode depending on your web browser equipment on vehicles... Is connected to a sputtering – or clicking – halt resistors operate in most. Jumps the gap at the plug it is difficult to give more information three spark plug reach how! The tip temperature is the hottest part of your vehicle that often goes overlooked plays... The seat or sealing surface of the spark deeper into the combustion chamber far the plug replacement!