Nope
Before you remove the glow plug spray brake cleaner and blow any residue out of the glow
plug depression - if the female threads require cleaning, you can use a fine wire brush with a taper and then make sure you vacuum out the cylinder before you put the new glow plug in.
Lubricant is not required - just snug up
the plug & then back out and tighten
carefully - I replace all the glow plugs
when I service my diesel.
Jim
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