Quote:
Originally Posted by John99Boxster
Porsche, published a bulletin indicating that it doesn't recommend using anti-seize compound on spark plugs for any of their engines (Porsche Technical Bulletin 9102, Group 2 identifier 2870). The bulletin applies retroactively to all models and the theory is that the anti-seize tends to act as an electrical insulator between the plug and the cylinder head. This could have detrimental effect on the firing of the spark due to the loss of a good, consistent ground connection.
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It also represents one of the worst technical pronouncements they have ever made. The first time you encounter a seized plug, and end up having to re-tap the opening; or worse yet, install a threaded insert after the original threads are destroyed by removing the old plugs, you will understand why anti seize is critical on dissimilar metals exposed to high temperatures.
We have used anti seize on Porsche street and race engines for several decades, and never once had any plug firing issues...............