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The slab is 15 inches thick in most places, but the pipe is 6 inches in diameter and the bell housing at the end of the pipe is 10.4 inches in diameter, meaning that over the pipe the slab was just 4 to 6 inches thick — not much better than a common sidewalk, Bea said.

A pressure fitting is provided on the right side of the clutch bell housing.

What remained of the back half of the motor lay in the bilge, with barely recognizable bits of mounts and bell housing and oil pan sprayed about the engineroom.