Do they? That would explain it then. Every one of my injectors was covered in a stick goo.

Next time I'll chase the threads. I didn't mess them up that badly. Just the first thread or two was torn out.

My prechambers are currently soaking in cleaner. I'll see how easily it threads after cleaning them.

I can say the metal the tool is made of is stronger than the metal the prechamber is made of. The tools threads are not damaged in the slightest.

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.