Which part is the cylinder head bolted to?

The cylinder head is bolted to the block, which is the main component of the engine that houses the cylinders and serves as the foundation for the engine assembly. The block provides structural support and alignment for the cylinder head.

When the cylinder head is installed, it forms a critical sealing interface that is essential for maintaining the combustion chamber's integrity, allowing the engine to build compression and contain gases produced during the combustion process.

This connection is vital for the engine's overall performance, as a properly mounted cylinder head ensures that the engine can operate efficiently and effectively, contributing to the overall power output and reliability. Other components like the crankshaft or oil pan do not provide this direct structural connection to the cylinder head, thus making the block the correct part to which the cylinder head is bolted.