Try it out and see has worked for a lot of people. Not all fans are engineered with no wiggle room, and likely most would fail sooner, but on the other hand, an

Try it out and see has worked for a lot of people. Not all fans are engineered with no wiggle room, and likely most would fail sooner, but on the other hand, an immersed computer is more likely to run continuously, and startup is harder than continuous running. The oil likelu provides better heat disipation for all parts of the fan as well, which could also prolong life. Otherwise, with better disipation, you can probably remove fans from many components, possibly swapping heatsinks in some cases.