Cylinder Heads for Waterboxers: The Full Story (Updated ...
Where the Spanish failed from the onset was in regard to quality control of the parts they used and the workmanship. Specifically, the valves used—and the valve job (grinding of the valve seats and valve faces)—were both very, very poor. The photo above (left) is of an intake valve removed from an AMC cylinder head with 29,782 miles on it ...
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