Lost Foam for Fine Features

The lost foam casting process allows more complex and detailed passages and other features to be cast directly into the cylinder block.

In the cylinder block, oil galleries, crank case ventilation channels, oil drain back passages, and coolant passages are cast into the block.
These features would otherwise require drilling or external plumbing (with a potential for leaks).

Lost Foam castings have tighter dimensional tolerances compared to sand castings, because variations caused by core shift and core variability are eliminated and there is much less tool wear over the production life.

The direct result is a significant reduction in machining costs and infrastructure investment and fewer opportunities for errors in machining and assembly.

Lost Foam Casting is a highly efficient and reliable process for producing complex castings for the new GM high performance engines.