The part that was factually incorrect is: "injectors always spray fuel onto the GP ( when hot ) to fire the engine."
I agree the engine is toast.
To control drill depth you can buy different size drill stops with set screws. I don't like them and prefer a stiff tube over the drill bit as a stop. Ball point pen, nylon tubing etc cut to length works much better. I would not rely on tape as a depth marker on the drill bit because when the drill punches through the hole, you can not stop it.
Quote:
Originally Posted by ah-kay
Isn't it FACTUALLY CORRECT as per the picture that the injector is over the GP?
It took a lot of effort for the PO to drill through the pre-chamber plus the aluminum head, and a looong drill. The head is toasted. What was done was done, move on. It may be possible to remove the pre chamber and plug the hole with a set screw. But with no dis-respect to the PO, I would leave it to the professional.
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