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The cylinder block uses
four separate foam sections assembled into a single pattern. With
these four sections, the following detailed features are cast
directly into the cylinder block --
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A 580-mm long and 12 mm diameter main
oil passage to feed high-pressure oil to the balance shaft and
crankshaft bearing surfaces and the cylinder head. This eliminated
three long drilling operations.
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Six 75-mm long, 7-mm diameter oil
feed holes from the main oil passage to each crankshaft bearing
surface, eliminating drilling.
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Four 75-200 mm long, 7-mm diameter
oil feed holes from the main oil passage to both balance shaft bearing
surfaces, eliminating drilling and four sealing plugs.
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Cast-in-place balance shaft covers
eliminate the need for two separate covers, two gaskets and eight
mounting bolts for each cover as well as eliminate machining for the
cover mounting face and bolt and dowel holes.
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Four oil holes of varying size are
cast-in for the oil filter, eliminating two drilling operations.
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