Quote:
Originally Posted by Number_Cruncher
I think that using an anti-sieze upon reassembly is important, but ensuring a good seal on this taper is IMO vital. To this end, I think that putting the glow plug in at a reduced torque (in a mis-guided attempt to make it easier to remove next ime) might actually be counter-productive, because the reduced end-load will compromise the taper seal.
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Yes, Yes, Yes...it is making sure that the plug seats all the way and makes the proper seal that is key to making sure that carbon does not build up around the thicker tapered end.
I believe that when they are not seated all the way, more than anything else, is what causes them to get stuck when they are attempted to be removed the next time around.