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Spark
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Spark
Plugs Technical
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| All information and images on this website are copyright of spark-plugs.co.uk, provided as a courtesy to our customers and should NOT be used for commercial gain. Please request our approval before using any content from this site for anything other than personal use. |
| Spark plugs FAQ is a collection of questions which we get asked quite regularly. Please check to see if your enquiry is answered in our FAQ before mailing for help. |
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| About Iridium spark plugs provides information about NGK Iridium IX and Denso Iridium Power such as benefits, theory and comparisons between manufacturers parts. |
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| NGK Iridium X-reference lists common NGK plug part numbers and their close equivalent constructed using Iridium tipped centre electrodes. |
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| Manufacturers X-ref cross references common Bosch, Champion and Denso applications to their NGK equivalents. |
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| The NGK code provides a 'breakdown' key to spark plug features as described by the NGK part code. Use this code to learn more about NGK's plugs specifications for your part number. |
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| The Champion code provides a key to Champion spark plug features as described by the Champion part code. |
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| The Denso code provides a key to Denso spark plug features as described by the Denso part code |
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| NGK Plug types images and brief details of various types of plug from NGK such as Iridium IX, Platinum EVX, GV, G etc. |
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| Denso Plug types images and brief descriptios of various parts from Denso including Iridium power and ZU platinum plugs. |
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| Analysis contains images and cause explainations of common faults associated with incorrect firing conditions. This is a good place to begin troubleshooting ignition related problems. |
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| Gap
settings. This is a table of equivalent metric and imperial plug
gap settings - useful if you have imperial feeler gauges and a metric
setting (and vice versa). Many parts by NGK and Denso are suffixed
by a number (e.g. -11, -13 etc.) these numbers actually specify the
factory preset gap setting as 1.1mm, 1.3mm etc. |
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| Torque settings This is a table of general values for recommended tightening torques for various cylinder head (i.e. aluminium, cast iron), plugs seat type (i.e. tapered or flat with gasket) and plug size/diameter (i.e. 8mm thru 18mm). It is important to use the correct torque setting when fitting to avoid damage to the cylinder head and spark plug. |
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| NGK Supercessions is a table of old/obsolete NGK part numbers and their current equivalent. | |
| Champion Supercessions is a table of old/obsolete Champion part numbers and their current equivalent. | |
| NGK Sparkplug cap symbol key |
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| Nitrous Oxide (NO2, NOS etc) recommendations. Strictly a FAQ but too long to include in our FAQ section |
| Please check our FAQ to see if your enquiry has already been answered before sending emailing any additional enquiries. |
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