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Topic: Spark plug

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	Howstuffworks "Spark Plug"
		The spark plug is quite simple in theory: It forces electricity to arc across a gap, just like a bolt of lightning.
		The spark plug must have an insulated passageway for this high voltage to travel down to the electrode, where it can jump the gap and, from there, be conducted into the engine block and grounded.
		Spark plugs use a ceramic insert to isolate the high voltage at the electrode, ensuring that the spark happens at the tip of the electrode and not anywhere else on the plug; this insert does double-duty by helping to burn off deposits.
	auto.howstuffworks.com /ignition-system2.htm (0 words)

	How you can read spark plugs and select them - by Gordon Jennings.
		In the "surface-fire" plug the spark gap was between the center electrode and the flanged-inward end of the metal shell, and the insulator material filled its interior out almost flush with the electrode's tip.
		A final variation on the basic spark plug theme you should know about is something NGK calls a "booster gap," and is known at Champion as an "auxiliary gap." By any name it's an air gap built into a plug's core, and it improves resistance to fouling.
		Retard the spark timing in small (two or three degrees) increments and as you get close to the optimum advance you'll find two things happening: first, the whole plug will be running colder; second, the center electrode will begin to acquire a film of fuel deposits extending out from the insulator nose toward its tip.
	strappe.com /plugs.html (4710 words)

	Spark plug construction - Patent 3940649
		In some instances spark plug construction has moved in a direction of spark plugs which may not be disassembled for cleaning purposes and in other instances the path of spark plug development has extended in the direction of spark plugs which may be disassembled for cleaning.
		The spark plug of the instant invention has been specifically designed so as to be capable of being disassembled for cleaning and has further been designed to substantially fully shield the spark gap end of the center electrode portion thereof.
		Further, the spark plug of the instant invention has also been designed in a manner enabling the center electrode to be readily replaced, if desired, and to also enable partial cleaning of the spark plug spark gap area without removal of the spark plug from an associated engine.
	www.freepatentsonline.com /3940649.html (1133 words)

	Spark plug at AllExperts
		Spark plugs have an insulated center electrode which is connected by a heavily insulated wire to an ignition coil or magneto circuit on the outside, forming, with a grounded terminal on the base of the plug, a spark gap inside the cylinder.
		A spark plug is composed of a shell, insulator and the conductor.
		The metal case of the spark plug bears the torque of tightening the plug, serves to remove heat from the insulator and pass it on to the cylinder head, and acts as the ground for the sparks passing through the center electrode to the side electrode.
	en.allexperts.com /e/s/sp/spark_plug.htm (3350 words)

	How to Replace Spark Plug Wires - eHow.com
		Each spark plug wire is connected to a spark plug, and brings the electrical spark to the spark plug in order to ignite the fuel inside the engine's cylinders.
		Although replacing the spark plug wires should be part of a 30,000-mile tuneup, many shops don't include this because the cost of spark plug wires brings up the cost of the tuneup.
		Spark plug wires - To test spark plug wires, wait until it is dark outside, turn your car on and lightly rev your engine while another person watches your wires.
	www.ehow.com /how_16427_replace-spark-plug.html (802 words)

	Spark plug, Spark plug wire, spark plug gap, spark plug cross reference and ignition wires at Sparkplugs.com
		Spark plug, Spark plug wire, spark plug gap, spark plug cross reference and ignition wires at Sparkplugs.com
		We have all those hard to find high performance spark plugs that you are looking for.
		We stock Iridium spark plugs, Platinum spark plugs and even hand made racing spark plugs from companies like NGK, Denso, Champion and Autolite.
	www.sparkplugs.com (0 words)

	Reading and Selecting Spark Plugs
		It conducts a spark that is generated in the ignition coil into the combustion chamber and provides a gap for that spark to jump across.
		When a spark plug provides these three basic items, it is then capable of initiating the combustion process, There is a large amount of technology which goes into the design and manufacture of a spark plug that meets these requirements and provides long life and superior engine performance.
		The spark plug is the correct heat range and was a victim of the engine's condition, not the cause of it.
	www.nightrider.com /biketech/spkplghnbook.htm (1878 words)

	Pelican Technical Article: BMW 3-Series E36 Spark Plug Replacement
		Install your new plugs using a torque wrench to measure the amount of torque applied to the plug (Figure 18).
		This means that the threads of the spark plug don't mesh properly with the ones in the head, instead choosing to "cut their own path." This damages the threads on the head, and in extreme cases, may destroy the threads in the cylinder head entirely.
		Torque the spark plugs to 25 Nm (18.4 ft-lbs).
	www.pelicanparts.com /bmw/techarticles/E36-Spark-Plugs/E36-Spark-Plugs.htm (2411 words)

	Champion Spark Plugs (Site not responding. Last check: )
		The length of the threaded portion of the spark plug, as measured from the end of the threaded area to the seat, varies from.375" to.750".
		Spark plugs with small diameter center electrodes (.050") were originally designed to improve starting and anti-fouling characteristics in small two-stroke engines such as snowmobiles, chain saws, and dirt bikes.
		The words "hot" or "cold," when used in referencing spark plugs, are often a source of confusion and misunderstanding, since normally a hot spark plug is used in a cold engine (low horsepower) and a cold plug in a hot engine (high horsepower).
	www.edelbrock.com /automotive/sparkplugs.html (1370 words)

	How you can read spark plugs and select them - by Gordon Jennings.
		In the "surface-fire" plug the spark gap was between the center electrode and the flanged-inward end of the metal shell, and the insulator material filled its interior out almost flush with the electrode's tip.
		A final variation on the basic spark plug theme you should know about is something NGK calls a "booster gap," and is known at Champion as an "auxiliary gap." By any name it's an air gap built into a plug's core, and it improves resistance to fouling.
		Retard the spark timing in small (two or three degrees) increments and as you get close to the optimum advance you'll find two things happening: first, the whole plug will be running colder; second, the center electrode will begin to acquire a film of fuel deposits extending out from the insulator nose toward its tip.
	www.strappe.com /plugs.html (4710 words)

	Stealth 316 - 3S Spark Plug Information
		Spark plugs are designed to work with the insulator tip and center electrode temperature within the ideal heat range of about 500ºC to about 850ºC (~930ºF to ~1560ºF).
		Spark gap - the voltage needed to ionize the electrode gap is directly proportional to the gap width and the required voltage increases with a larger gap.
		Therefore, spark plugs must be periodically inspected, the electrodes cleaned (special care is required with platinum or iridium tips) and the spark gap corrected to the proper width.
	www.stealth316.com /2-sparkplugtech.htm (2854 words)

	Spark Plug FAQ
		In identical spark plug types, the difference from one heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber.
		A longer the nose on a spark plug forces the heat from the tip to travel farther before it is absorbed by the cylinder head, which reatins more of the heat in the plug tip - making the plug "hotter" than a similar plug with a shorter nose.
		Whether a spark plug is installed in a lawn mower, boat, truck, or race car, the plug tip temperature must remain between 450° C and 850° C. If the tip temperature is below 450°C, the insulator area surrounding the center electrode will not be hot enough to burn off carbon and combustion chamber deposits.
	dodgeram.org /tech/gas/spark_plugs/s_plug_faq.htm (1322 words)

	NGK Spark Plug Information
		A spark plug part number might fit hundreds of engines and, although the factory will typically set the gap to a pre-selected setting, this may not be the right gap for your particular engine.
		Whether the spark plugs are fitted in a lawnmower, boat, or a racecar, the spark plug tip temperature must remain between 500C-850°C. If the tip temperature is lower than 500°C, the insulator area surrounding the center electrode will not be hot enough to burn off carbon and combustion chamber deposits.
		In identical spark plug types, the difference from one heat range to the next is the ability to remove approximately 70°C to 100°C from the combustion chamber.
	home.alltel.net /jfarrell/NGKSparkPlugInformation.html (2885 words)

	Spark Plug Wires - Accel Spark Plug Wires - Taylor Spark Plug Wires - Performance Spark Plug Wires
		The spark plug wires on your car, truck, van, or SUV are responsible for harnessing tens of thousands of volts and delivering that juice to the spark plugs every time, without fail.
		Any breakdown in the spark plug wire gives the electricity somewhere else to go, and the result is engine misfiring, fouled spark plugs, and rough running.
		With thick silicone spark plug wire jackets and excellent RF suppression, our Accel and Taylor high-performance spark plug wires can deliver a hotter spark for better combustion, and that means more power and torque to the pavement.
	www.car-stuff.com /sparkplugwires.htm (316 words)

	Resistor composition for spark plug having a resistor enclosed therein - Patent 4173731
		The spark plug as claimed in claim 10, wherein said non-oxide compound is a nitride selected from the group consisting of Si.sub.3 N.sub.4, AlN, BN and Si.sub.2 ON.sub.2, or a mixture thereof.
		The present invention is concerned with a resistor composition for a spark plug having a resistor sealed therein.
		3, the peak electric current of the spark plug in accordance with the present invention is considerably decreased as compared to that of conventional spark plug A and it is understood that spark plug B containing the resistor of this invention is effective for preventing noise.
	www.freepatentsonline.com /4173731.html (2974 words)

	Champion - A Complete Guide To Spark Plug Performance
		When a spark plug provides these three basic items, it is then capable of initiating the combustion process, There is a large amount of technology which goes into the design and manufacture of a spark plug that meets these requirements and provides long life and superior engine performance.
		The shell of a spark plug is a threaded metal hex that is used to seal the combustion chamber and provide a means to remove and install the spark plug.
		The spark plug is the correct heat range and was a victim of the engine's condition, not the cause of it.
	dodgeram.info /Engine-Gas/SparkPlugs/spkplghnbook.html (3093 words)

	Tech Info - Spark Plugs Overview
		Spark plugs are the "window" into the engine, and can be used as a valuable diagnostic tool.
		A sufficient amount of voltage must be supplied by the ignition system to spark across the spark plug's gap.
		The temperature of the spark plug's firing end must be kept low enough to prevent pre-ignition, but high enough to prevent fouling.
	www.ngksparkplugs.com /techinfo/spark_plugs/techtips.asp?nav=31000&country=US (217 words)

	Spark Plugs
		Spark plugs should be checked at least yearly, and replaced as often as necessary.
		In identical spark plugs, the differences from one heat range to the next is the ability to remove approximately 70°C to 100°C from the combustion chamber.
		You see, the larger the spark kernel that is generated by the spark jumping the electrode gap, the more complete burn, the better power and efficiency and the smoother the car will run for longer periods of time.
	www.centuryperformance.com /spark.asp (4117 words)

	Land Rover Spark Plug Wire - Partstrain.com
		The Land Rover spark plug wire is made of several layers of materials capable of having a lot of resistance.
		That’s why your Land Rover spark plug wire has the power to carry tens of thousands of volts from the distributor cap going to the spark plug every time the engine is started.
		This is because the insulation and core of your Land Rover spark plug wire are hidden under its surface.
	www.partstrain.com /ShopByDepartment/Spark_Plug_Wire/LAND_ROVER (499 words)

	Spark Plugs, a Window into Your Engine [Rocky Mountain Harley-Davidson & Buell]
		Spark plugs not only deliver the necessary jolt to ignite your fuel and air mixture, they also enable you to look inside your motorcycle's engine and determine if it is running properly.
		If the tip of the plug has a light tan coloring and has no significant deposits on the electrode, this is an indication that you are getting a complete burn of fuel and air in your combustion chamber and that your motorcycle's engine is running properly.
		Your spark plugs may be old, your fuel/air mixture may off, or you may have simply left your enrichener on too long.
	www.rmh-d.com /service/spark_plugs.php (528 words)

	The Coso Artifact: Mystery from the Depths of Time
		Spark plugs of the 1960's era typically terminated with no visible threading and tapered to a dull point.
		Spark plug collectors are quite familiar with spark plugs that have been found in unusual places.
		It was a 1920s-era Champion spark plug that likely powered a Ford Model T or Model A engine, modified to possibly serve mining operations in the Coso mountain range of California.
	www.talkorigins.org /faqs/coso.html (5180 words)

	Hummer Spark Plug Wire - Partstrain.com
		The Hummer spark plug wire connects the distributor on to the spark plugs, and then a similar wire connects the distributor on to the coil.
		The distributor then is the one that sends the voltage on to one spark plug at a time that is through the Hummer spark plug wire.
		Such breakdown in the Hummer spark plug wire is definitely not good news, for any breakdown gives the electricity to go somewhere else and the result would be misfiring of the engine, fouled spark plugs, and Hummer vehicle having a rough running.
	www.partstrain.com /ShopByDepartment/Spark_Plug_Wire/HUMMER (485 words)

	Replacing Spark Plug Wires - Popular Mechanics
		The plug wire usually is more accessible at the coil end, but it may not be a simple push-on.
		The spark plug wire has a seemingly simple job: Carry the high-voltage electricity produced by the ignition coil to the terminal of the spark plug.
		Once at the plug, the electricity travels to the other end of the plug, and jumps a gap between electrodes to produce the “spark” that ignites the fuel mixture.
	www.popularmechanics.com /how_to_central/automotive/1272351.html?page=2 (1143 words)

	Audi A4 1996-2001 Spark Plug Change Procedure
		Spark plugs used on all Audi engines are classified as "long life" by their manufacturers and generally need replacement only during scheduled maintenance services.
		Spark plugs are generally pre-gapped by the manufacturer during production but should be checked before installation.
		Spark plug specifications and part numbers may also be found in the applicable Fuel Injection and Ignition section, Repair Group 28.
	www.bentleypublishers.com /tech/audi/audi.b5.spark.plugs.replace.htm (535 words)

	Spark Plug Analysis (Site not responding. Last check: )
		If only one or two plugs in a set are fouled, it is a good practice to check for sticking valves, a cracked distributor cap, or bad secondary ignition wires.
		Fouling of the entire set might result from an incorrect heat range spark plug or an over-rich air/fuel mixture caused by a clogged air cleaner filter element, a sticking heat riser valve, or a faulty choke.
		It may originate from glowing combustion chamber deposits, hot spots in the combustion chamber due to poor control of engine heat, cross-firing (electrical induction between spark plug wires), or the plug heat range is too high for the engine or its operating conditions.
	www.gnttype.org /techarea/engine/plugs.html (1271 words)

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