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