These nuts need to be removed and re-installed about once a month.
This is to prevent rust from seizing them (oh yes, oh yes) and to ensure they don't work themselves loose.
Loc-tite will burn and may cause further seizure issues.
And if you don't want to replace the cylinder head, do NOT tighten them back up without a torque wrench!
Torque to 8 ft.lbs.
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