I have dug the cylinder heads and inlet manifold out.
I found some unusual rust in the core plug under the manifold - glad I spotted this - I'd have been blaming the water pump, or the inlet manifold gaskets in due course. The hole is shown by the self tapper in the following picture.
The heads have already had the valves and guides replaced, and the seats recut. However when these were inspected the castings were porous in some areas, so I had them welded. They pass pressure testing OK now, but as you can see some of the combustion chambers are a funny shape round the edge where weld has been let in. This needs shaping, and the sharp chamber edges smoothing off (to prevent detonation - pinking).
Its a lot of work and expense, but worth it as the heads are low mileage and haven't warped, and haven't been excessively skimmed.
I am going to cheat a little as these are being delivered to Roy Burrell tomorrow so he can work his magic upon them, I may get them ported a little at the same time too. This engine is going to need all its horse power to overcome 4wd losses
So that's one set of jobs underway, when they come back and I get them bolted on I will try and fire up the engine for the first time in many many years
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