Quote:
Originally Posted by funola
I am not seeing this description clearly. The (pre-chamber end) would be the tip end only?
Here's a pic of the glow plug. Where is the carbon packing?

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Between the threads and the taper where it is supposed to seal. Sometimes they don't seal well at the taper, and carbon packs in the void around the main body of the glow plug. At least that is my understanding. I usually apply antiseize to this area as well as the threads.