J, the cracks are near or part of older pin repairs. Its leaking around the pins too - The picture shows the older pin repair right on the thin bridge between the exhaust valve seat and the precombustion chamber - The crack is hard to see but extends down into the valve chamber - The other problem looks identical but without the crack in the lower valve chamber - Both could probably be repaired with a bigger pin or furnace welding. I dont know if it would be worth doing or if it would hold up- We only have a couple shops in Jax for head work Ill call around Monday for the other one. The 2nd picture is the top of my Piston after the insert in the Head came loose There are two like this - ok275 at bellsouth dot net
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