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Registered
Join Date: Mar 2019
Location: Saarland, Germany
Posts: 1,231
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Regarding copper paste or other grease in the spark plug thread: I don't use it and don't recommend it. There are other opinions here.
My concern: "contact corrosion" between the copper and aluminum cylinder head and the steel thread of the spark plug in between. The greased thread can also lead to the torque being exceeded. Finally, the grease can insulate so that the heat cannot be dissipated from the spark plug as intended. Too much concerns for me. Clean the threads by brush and gently screwing the spark plug and applying the torque with the torque wrench.
Thomas
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1981 911 SC Coupé, platinum met. (former tin (zinc) metallic), Bilstein shocks, 915/61,930/16,WebCam20/21, Dansk 92.502SD,123ignition distributor with Permatune box as amplifier,Seine Systems Gate Shift Kit,Momo Prototipo. Want to get in touch with former owners of the car. Last registration in US was in 2013 in Lincolnshire/lL.
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