23-05-2022, 11:06 PM
It would be worth checking to make sure that the head is reasonably flat. Put a straight edge along it and see if you can get a thin feeler gauge anywhere along the length. Anything more that about 2 thou and I would get the head skimmed. Given that the gasket has blown between Nos: 2na d3, I would pay particular attention to the head between those cylinders. And yes, a blown gasket between the two middle cylinders is noisy, as when one is on the firing stroke, the other is on the inlet stroke and the mixture in the cylinder that is trying to charge itself will burn and tend to blow back into the inlet manifold.