Proper NGK Gapping Instructions. With the 4-electrode plugs you're shielding almost all of the spark which is just awful. Brief overview of Multi-Ground Electrode spark plugs from NGK Spark Plugs. When replacing spark plugs, ensuring that the plugs have the proper gap is critical to engine performance. * X suffix = .044" * Y suffix = .060" * Z suffix = .080" Gaps should never by adjusted on Platinum+4 or Platinum2. E3 Spark Plugs for automotive and powersports applications have a unique multi-leg ground electrode that is pre-gapped at our factory to meet the O.E. Multi-electrode spark plugs - Clio - BobG : I need to change the spark plugs on my wife's 1.2 Clio. Q. For the electricity to be able to jump between the two electrodes the spark plug have to be at a very specific distance. To increase the gap, gently bend the ground electrode towards the center electrode. To do this, use either a pair of needle nose pliers or a dedicated spark plug gapping tool. The following steps explain how to gap your spark plugs: If you’re regapping a used plug, make sure that it’s clean (gently scrub it with a wire brush). Adjusting the distance between the two electrodes is called gapping your spark plugs. Importance of the Spark Plug Gap. I gaped two or three until i noticed that the electrodes had a slight curve to them which made them difficult to read with the tool I was using. If the gauge goes through too easily without touching the electrodes, the gap is wide. Caution should be made in selecting a "high performance" plug. The gap is obviously not flat on the dual electrode NGK BPR6EKN, it's u-shaped. A spark plug creates a small string of high-voltage electricity within a specifically measured gap between a center electrode and a ground electrode. If the gap is too big, then the spark may struggle to jump the gap at all. Fine Wire Plugs. But they've been bought for an earlier vsn of the engine in this car. Most people go through the “too large–too small–too large” bit a couple of times for each plug, especially the perfectionists. Spark Plug Type Matters. For the spark plug to ignite the fuel air mixture the electricity has to arc between the two electrodes of the spark plug. If the gauge doesn’t go through, or if it goes through too easily without touching the electrodes, you need to adjust the distance between the electrodes. The gap is the distance between the center and side electrodes, set so arcing occurs at the proper voltage that ignites the fuel and generates the combustion that makes the engine run. requirements for the vehicles they are listed to fit. Multi-electrode spark plugs are marketing gimmicks that just aren't worth using. You need a feeler gauge to gap your spark plugs properly. I have read other answers. The majority of these plugs come pre-gapped from the factory. 625 Posts . NGK do not recommend gap adjustment for precious metal spark plugs. If it is necessary to widen the gap, do so with a tool that only pulls back on the ground electrode without touching the center electrode or the porcelain. Gap new as well as old spark plugs, even if the package says that the new plugs are “pre-gapped.” To avoid problems, work on only one plug at a time, in cylinder sequence order. If the gap setting of a spark plug with multi-ground electrodes comes into question, a wire style gap tool must be used to verify the pre-gap setting. It has a single electrode with larger dimensions compared to other spark plugs. If you keep adjusting the gap too narrow or too wide, don’t feel bad. Thanks, I was just curious. I guess since most people don’t use them the google search would be useless. A. You can adjust the spark plug gap if it was not set correctly. A variety of techniques are used to adjust electrode gaps. It is important to note that multi-ground does not mean multi-spark, there will still only be one spark at a time. The spark occurs one at a time in which ever facilitates the spark to occur (heat, closest one to the center, “gap”, electri c conductivity and i gnition system Sponsored by DENSO. This directs the spark to the edge of the center electrode, thus exposing it … This spark plug represents a conventional J-gap style spark plug. E3 has taken multiple spark plug design features, such as cut back ground electrodes, sharp edges and surface gaps, and combined them to create a new ground electrode design. This is a bit more in the spirit of a challenge-so I've not thrown into mechanics, where it should really be. Flat blade feeler gauges can give you an erroneous result because the gap between the tip and ground electrode is rarely perfectly flat even on a single electrode plug. Most Bosch Spark Plugs are factory pre-gapped for popular vehicle applications. If adjusting the gap on fine wire or precious metal plugs such as platinum or iridium, be very careful not to apply any pressure or prying force to the fine wire center electrode or insulator as they can be damaged. This is an extreme Champion racing spark plug once used in 15:1 NASCAR superspeedway motors with a radically cut-back side electrode. V-Power spark plugs are a patented design by NGK to improve ignitability and reduce quenching.. Ignitability is improved by the V-groove cut in the center electrode, which runs parallel to the ground electrode. Discussion Starter • #1 • Jun 24, 2008. Spark plug with single ground electrode (J-gap), type-A. In addition, a new plug with sharp edges on the center electrode will spark more reliably than an older, eroded plug. The type of spark plug makes a difference on gapping. The wire should catch on them as it passes through. I've seen some other plugs with multiple electrodes with as many as 6 points that claim to "fire hotter", but that makes no sense, since the spark is naturally going to follow the one path of least resistance, which would be whichever electrode is closest to the center, seems like just a sales gimmick to me. Be careful that the gauge touches only the ground electrode and not the porcelain or the center electrode. With multiple ground electrode spark plugs the spark only jumps one of the gaps in order to reach ground in the path of least resistance, producing only 1 spark … Anyone know a model number for 2 way 3way or 4way electrode spark plugs for a 2 stroke 01 johnson? Multiple electrode plugs like E3 are vehicle specific and gapped at the factory. * Gapping is not recommended on multi-ground plugs, and should never be attempted on the Bosch IR Fusion series. about multiple ground electrode spark plugs is, that they fire more than one spark at a time; a true understanding of basic electricity physics does not al low this to happen. Beyond that slight adjustment, the ground electrode and center electrode won't align properly, hindering spark plug performance and drastically reducing plug life. If it is necessary to widen the gap, do so with a tool that only pulls back on the ground electrode without touching the center electrode or the porcelain. I made the mistake of measuring and misreading the gap on a few dual electrode plugs. This setting should not be altered in any way for any reason. To close the gap on a plug, gently tap the plug, electrode first on a hard surface. The electricity sparks between the top of the center electrode and the bottom surface of the side electrode. When people buy the multi ground spark they tend to think about performance when they should be thinking of stability and durability. If you’re regapping a used plug, make sure that it’s clean (gently scrub it with a wire brush). The gap measurements are indicated either on the box, or by the part number located on the spark plug shell. Can anyone tell me if you are supposed to gap the recommended twin ground plugs when installing them in the 3.4? Explaining my opinion on multi-electrode spark plugs (are they a marketing gimmick?) To find the right gauge, look for a spec sheet for your automobile in the owner’s manual, or you can get the information from a local auto parts store. That distance is what we call the SPARK PLUG GAP. For modern fine-wire spark plugs, you should not measure the gap because you could damage the center electrode. You shouldn’t see any cracks or bubbles in the porcelain insulator, and the threads should be unbroken. Be the first to know about sales and promotions. To contact them, click here. Hook the part of the feeler gauge that’s used for bending electrodes under the side electrode and tug very gently to widen the gap. The gap between the center and side electrodes of a spark plug must be an exact distance; otherwise, your plugs don’t fire efficiently. I've read all the advertising blurb about multi electrode types such as Bosch but wonder if there is really any benefit in fitting such items or whether they might actually cause inferior combustion as … Are Bosch Spark Plugs pre-gapped at the factory? To close the gap on a plug, gently tap the plug, electrode first on a hard surface. Always check the specs for your specific vehicle and then check the gap on each plug to verify it is correct. Adjusting the Electrode Gap. If you’re using a new plug, it should be clean and new-looking, with the tip of the side electrode centered over the center electrode. If the wire didn’t go through, the gap is too narrow. Re: Surface Gap Spark Plugs? I have q78yc and while single electrode plugs are plentiful, I can’t find multi electrode ones online. Multi-Ground plugs are offered in 2, 3 and 4 ground electrode designs. The spark gap is the closest distance between the center electrode and the side electrode. I've also had problems with the damn things grounding out on the cylinder head instead of the electrodes. All standard multi ground electrode spark plugs have a factory pre-gaped setting. Thus, if the engine design requires a side discharge plug, more ground electrodes extend plug life. When adjusting the gap on a spark plug, any spark plug, the best tool to use is a wire feeler gauge. The following steps explain how to gap your spark plugs: 1 Clean your spark plug. We are not NGK Spark Plugs USA. NGK doesn't recommend adjusting the plug gap more than .008" in either direction. Do not mistake the BRISK Multi-Spark technology for spark plugs with multiple ground electrodes, as these gaps are arranged in a parallel. Widen the gap, if necessary, by hooking the gauge on the ground electrode and tugging gently. Anyhow the new motor has the correct plugs, superb condition & all the right colours on 'em. A feeler gauge is shown here. You want the gauge to go through fairly easily, just catching the electrodes as it passes. But, it is still a good idea to inspect the new spark plugs for damage or defects. An appropriate method and tool should be used for gap adjustment although it has come to our attention that a variety of improper methods are used that lead to implications. Run the wire between the two electrodes of the spark plug. Spark/ignition comes from the spark plug. NGK.com specializes in hard to find NGK products. Press the side electrode very gently against a clean, mar-proof surface until it’s slightly bent down toward the center electrode. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases. If you’re using a new plug, it should be clean and new-looking, with the tip of the side electrode centered over the center electrode. On this plug, the side electrode is closest to the center electrode where it hovers over the center. Andrew Markel shows how and how not to gap a fine-wire spark plug. Replacing and Adjusting Halogen and Xenon Headlamps. The upper plug is a triple electrode style. Spark plugs are an often overlooked but crucial part of a race engine and focus on how spark plug tuning changes can squeeze out extra power - Circle Track Magazine Plug manufacturers traditionally warn against gapping fine wire spark plugs due to the fragile nature of their electrodes. 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