Well,
After a good look at the water ways (as much as I could see in there) there is definately a fair bit of sediment, rusty and 'muddy' sediment, in a compacted layer at the bottom of the water jacket. It is quite thin, but there all the same. It just goes to show that all the flushing and good coolants mean nothing if it's early life has been neglected. The service book showed regular servicing on his travels around OZ while under warranty, a few other workshops for a year or so and then us up till now.
I reckon judging by what I have seen, a mixture of poor casting,(Thin and possibly bubbled?) and early cavitation/ corrosion are the prime suspects.
The coolant I drained out was bright green and clear, and was flushed last 20K ago, at last service when a 'P' gasket was done and Timing belt.
Radiator will be recored now too, 189K and 13 years the fins are getting soft.
New block will be back on Wednesday from the machinists and it'll be reassembled and back on the road hopefully by Friday
JC
The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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