If you have a spare, it should work if you torch out a tip to put on it. My experience is they are much too hard to drill.
I used an old injector line nut and ferrule to adapt an air line to do a blow down test. Blew a hole in an old tip to put on it.
No, nothing to seal into the precombustion chamber.
The injector hold down nut is torqued to 100 pound-foot and compresses the joints between the tip and the precombustion chamber and the body and the tip. The o-rings etc are only to keep dust etc out of the crevices.
If he is going to do a compression test, he will be dealing with more pressure than that.
Just take a 3/4 inch brass nipple and run a 1 inch unf thread down one end of it. That will then screw into the precombustion chamber.
Could I just unscrew the injector and stick a bore scope in the injector hole to inspect the cylinder or no?
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