Just been out and had a look and the hole is completly shagged my M12 tap slide straight in and out of the hole without touching the sides. So it looks like a new head or engine and at this point I'm leaning towards a new engine which I expect will be a DET when I can afford it as one of these is easier to find than an ET, So that's another S12 off the road for the fore seeable future, cleaning the soot from under the bonnet will keep me occupied for the time being though.
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