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All of this was written when the properties of Loctite 640 were not well understood. With my squirters, they just tap in there with a light press fit and the 640 holds them. No staking is necessary.
With a stock squirter, I would not even consider staking them. Staking the squirters is a placebo; it does NOTHING to keep them in there more than the 640 does.
In my own testing, I could not break my squirters loose after using 640. I had to use 250 degrees C of heat to break the adhesive....that's like 450 degrees F, way hotter than the engine would ever run at.
Also, Henkel, the manufacturer of Loctite 640 has a great spec sheet that shows their strength testing of 640.....immersed in ENGINE OIL at 125 degrees CELCIUS for...wait for it....1000 hours with no measurable loss in strength.
I would fully stick them in there with adhesive and not even bother staking them.
That is how my squirters work; no staking of any kind. Trust the adhesive, it really works.
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