The correct answer is; both technicians are correct.
Further Explanation:
The studs can be installed using both methods. The thread locker is used by many people daily when installing studs and this causes no issues. The studs can also be installed finger tight and still have no issues. So both technicians are correct.
When putting together an engine, there are some types things that must be used only with the thread locker to get the right fit and this will make the bolt doesn't move. Same with screwing something in and it only being finger tight, many things on an engine can't be so tight that they can't be taken back off easily.
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