Then think again which part of the plug is closest to the heat generated by the combustion process and therefore gets the hottest... the ground electrode and the center electrode not the insulator. If anything the center electrode would be trying to dissipate it's excess heat into the insulator not the other way around.
Without work done, heat travels from a zone of high temperature to a zone of lower temperature, not the other way around.
Originally Posted by claymore
Without work done, heat travels from a zone of high temperature to a zone of lower temperature, not the other way around.
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