Quote:
Originally Posted by Oakundeisen
+1 on 'its not the threads that seize' - been there done that. The carbon below the threads seizes the GP. The neck snaps off below the threaded body. Hence the strong advise to use Neverseize on the GP.
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I was under the assumption that the threaded portion of the the glow plug was the area that becomes seized. Now that I have a better understanding of where the carbon is actually building up, that changes everything.
If I understand correctly there is a chamfer near the bottom of the glow plug body and the electrode protrudes beyond that approx. an inch or so.
The chamfer near the bottom of the glow plug body seats at the bottom of the pre chamber in the head where it has a chamfer at the bottom as well.
If the bottom of the glow plug is not seated at the chamfer, carbon will migrate and impact the length of the glow plug body up to the underside of the threaded portion.
If I am correct, this would be like trying to remove a bolt that is embedded in concrete!?