I didn't have the head or block skimmed Paul, when I swopped the block over.
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My reason for suspecting the head gasket is that the plug is normal in condition.
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If the rings were gone I would expect an oily plug.
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This is what happened last time, so the symptoms are not the same.
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I did not notice any corrosion.
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Mark fastidiously cleaned up the surfaces.
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I didn't check whether they were true or not.
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I admit, if the block needs decking, it's scrap and I will just look at changing for another engine.
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If the ringlands have gone as you say, Paul, then yes, I did suspect that there might be a fueling problem which wasn't addressed last time.
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Again, if the bottom end does have to come out then I will look to see what it is, but this time, I'd likely just replace the whole engine for a stock one.
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There was no smoke from the exhaust and no burning of oil as such.
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It doesn't seem to fit the criteria for the rings having gone.
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I've covered 25,000 kms since I put it back together.
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