They make a special reamer that will fit on a socket wrench but if I remember correctly its a tad expensive. I read on here that a drill bit of the same size works and thats what I did. Crank it for a second or two to blast that carbon out of the prechamber. I probably won't do it the next time I need plugs done. I only did it this time because it was my first change and not a lot of carbon came out.
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Seth
1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo
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