I have some work shop manuals on dvd rom ur welcome to have a copy.. if it is any help to u .

tim

replace them at 100,000 km if you run a stock engine, stock ecu,

othewise for the sake of $30, replace them at every service interval, especially if you run big boost or poor fuel.

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Long live the WRC

$30? What plugs are you using?


I change my plugs yearly, even at that interval you get the odd plug which is not in tip top condition. Definitely something not to be left for 4-5 years between changes.