To much build up pressure in coolant system!
If I may.
The entire green circled area is suspect, and the red is where the compression burn has been going.
The arrows point to water ports where the gasses were entering the cooling system, and quite possibly even the two big holes at the back of the block.
(Just forgot to circle those)
On the head the circled area is where it's burned the surface from getting past the gasket and gone into the water jacket on the upper side of the gasket.
It wouldn't surprise me one bit that this was all only caused by a really old head gasket failure, but of course it should all be checked.
If I may.
The entire green circled area is suspect, and the red is where the compression burn has been going.
The arrows point to water ports where the gasses were entering the cooling system, and quite possibly even the two big holes at the back of the block.
(Just forgot to circle those)
On the head the circled area is where it's burned the surface from getting past the gasket and gone into the water jacket on the upper side of the gasket.
It wouldn't surprise me one bit that this was all only caused by a really old head gasket failure, but of course it should all be checked.
