Block is not as good as we were hoping, the rot is pretty bad at cylinder 3 and cylinder 6.. more evidence as to why it's crucial to do a proper drain and a flush of the block when doing a coolant change every couple of years, instead of just the lower rad hose which only empties the pipe system.
The rot is right were the block drain plugs are. The water/coolant pools there, rots and spreads.
unfortunately on mine it has also spread to the oil galley behind the oil pump feed.. Not good.
This, we "think" is where the oil was getting into the inlet manifold system, it was leaking into the combustion chamber and some leftover oil that wasn't burned off was escaping "up" when the inlet valve was opening and spreading into the manifold..
The engine as a result was starting to burn a little oil to.. So overall better than other blocks that we've seen but a real let down that the rot comprised the oil galleys as well..
A Couple of the con rod bearings where wearing out to, thankfully the con rods themselves are fine.. All the bottom end bearing and shells will be replaced as a matter of course anyways..
Next step is to thoroughly clean down the block and get rid of the sludge and silt and then blast it to see what's left.. This will 100% verify if the block is toast or not
Fun times!
Shane