Rich S. wrote:

Just a comment, take it for what it's worth. The aircraft engine shop where
I have my work done has an excellent reputation. Not just good, or better,
but excellent! One thing they will *not* allow in their shop is RTV. Not
ever.
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Apples vs oranges. Many car and truck engines REQUIRE the use of RTV
gasket compounds at one place or another. Specs for their use define
the bead diameter and location, open-cure time and final torqing
values. This has been the case for more than thirty years with some
manufacturers. Some gasket sets even include the required RTV.

-R.S.Hoover