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Your logic is good, but....it is a steel bolt into aluminum. You will not find to many aluminum bolts. You should use anti seize on steel bolts and your spark plug threads if they are threaded into aluminum.
Loctite is used when you don't want things to come apart. Usually steel on steel.
anti-sieze is something you put on threads that are usually in a high heat area, or a area that rusts so that you can get the assembly apart again.
Loc-tite is something you put on assembly threads that keeps the nut or screw or bolt from backing off temporarily so that you can tighten a bolt or screw or nut and it will stay put till you want it to come off with a wrench. Think of it as paint for the threads. when the paint dries, the nut is tight till you turn it.
Then there's no locking feature to the loc-tited threads if you re-tighten the nut/bolt/screw.
with not pulling the intake manifold if it's not leaking, BUT if you have already gotten that far I would do it and if done correctly this will save alot of time for future repairs.
I basically only have the thermostat left to pull and the manifold will be ready to come off. It has visible oil leakage on the back side, slightly in the front. I had to order the Fel-Pro gasket kit, no hurry, I'm this far and I hate leaks !! Also got gaskets for the valve covers I noticed oil leakage around these as well. Nothing that is causing a drip spot, but I want to stop any chances of it getting worse. I figured the valve covers wouldn't be any easier than right now while the runners are out of the way. I will place the runners on and mark the covers to grind down for future removal. The oil pressure switch looks like it is leaking where it is screwed into the block. Is it possible to remove it clean it up and reset ? Or is replacement the only alternative ? Today would have been a good day to make loads of progress, but wasn't feeling well and had to put the project on hold, will use this down time for more research.
If you do pull off the intake, before installing it again think about this.
It has been suggested by others on the FORUM and I have used this on my Corvette and also my Blazer. Dimple the front and rear of the block between the heads (where the rubber gasket is installed) with a center punch. Do the same on the intake. Forget the rubber gasket and use Permatex "The Right Stuff" on the intake gaskets and run a bead about 3/8" in diameter on the front and rear of the block. These dimples help hold the Permatex in place. The Right Stuff is better than silicone, you can torque the manifold in place (and put everything back together) and fire the engine up without a wait period. If you use silicone you should wait about 24 hours.
You don't have to hit the center punch hard, you don't want deep holes, just small depressions. Hey it works.
Remember preperation work goes along way, especially with the intake manifold and most anything else. If everything is not cleaned and ready for installation, you will have a poor outcome. JMO.
I agree, go ahead and replace the oil pressure switch.