V6 Chevy 90 degree engines
(→Intake manifolds) |
(→Blocks) |
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==Blocks== | ==Blocks== | ||
The Chevy 90º V6 is formed by the removal of the #3 and #6 cylinders of a SBC. All three V6 engines share the same 4.4" bore spacing and 9.025" deck height of the SBC engine. | The Chevy 90º V6 is formed by the removal of the #3 and #6 cylinders of a SBC. All three V6 engines share the same 4.4" bore spacing and 9.025" deck height of the SBC engine. | ||
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| + | The early engines and 4.3L (without balance shafts) shared the accessory drive used with the SBC including the pulleys, harmonic balancers, and water pumps. Marine applications used a short water pump and a 6.75" harmonic balancer. Like the SBC, two-piece rear seals were used until the end of the 1985 model year; 1986-present are one-piece. 1987 saw the use of roller lifters. | ||
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| + | Production 1992 4.3L with RPO L35 had modified cylinder blocks where a balance shaft are used. The balance shaft are gear-driven off the front camshaft gear; camshafts for use with balance shaft motors have a longer dowel pin, which cannot be interchanged with non-balance shaft engines. The current engine block in production since 1995 eliminated the front and rear freeze plugs with extra strengthening ribs, whereas the oil pan used was changed from stamped steel to aluminum alloy. The engine block has 10 oil pan bolts, making the early and late oil pans incompatible. | ||
==Displacements== | ==Displacements== | ||
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