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

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