Which style of cylinder block is least expensive to manufacture?

The one-piece cylinder block with integral cylinders is considered the least expensive to manufacture due to its simpler production process. This design eliminates the complexity involved in making separate components that need to be assembled later. As a single unit, it typically requires fewer machining operations and less assembly labor, which reduces manufacturing costs significantly.

In addition, a one-piece design enhances structural integrity and eliminates potential weak points that can occur in multi-piece configurations. This streamlined approach allows for efficiencies in production and lower overall material costs.

Other styles, such as two-piece with removable cylinders, involve additional components and assembly processes that can increase labor and material costs. Modular cylinder blocks often require specialized designs and tooling, adding to their expense. Cast iron blocks, while durable, can also involve higher material and machining costs depending on the complexity of the design. Thus, the integral style stands out as the most cost-effective option in cylinder block manufacturing.