(1) Think about getting a new mechanic, because he should obtain that tool to use on yours, and for other customers. (2) I have a 4-cylinder, so I can't offer hands-on advise for your model, but here's what I've read here (do your own search, please). Some vehicles may need the engine to be jacked up a small amount to improve access. You (or he) may need to buy a spark plug socket with a built-in universal joint, should be less than $15; better tool manufacturers have these. You (or he) may need to grind down a spark plug socket to obtain better clearance, my own 13/16 magnet plug socket was ground down over 30 years ago to get better clearance with my VW aftermarket intake manifolds. With the variety of extensions, etc., a real mechanic should be able to do this. You don't state how old your plugs or vehicle is, but if the other 5 looked fine, possibly you could just leave it there....but with that you increase your risk of threads seizure in the future, if the metal "welds".