Wow Serious erosion of the top of the piston on number two cylinder.
I would be leaning toward fouled injector.
Wow, that's crazy looking! How on earth did the top of the piston bond to the head like that? Does it break off, or is it welded on there good?
I thought fuel injectors that were dribbling usually melted the swirl chamber away first?
I initially thought it cut a hole in the pre chamber and did the damage but upon review of head pictures that is not the case. So some sort of oil issue with that cylinder?
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