Cylinder Head Assembly: Description and Operation

Cylinder Head:

Cylinder Head - Cross Section View:

The cylinders of the Boxster also have a range of special construction features, e.g. four-valve technology, camshaft adjustment, and hydraulic valve clearance compensation which helps to reduce necessary maintenance.

The four-valve technology improves cylinder filling. The implementation of liquid cooling in this engine which can compensate the increased thermal load placed on the engine resulting from the multi-valve concept allows four valves per combustion chamber to be used.

Three-Part Cylinder Head:

The cylinder head construction comprises the actual cylinder head, the camshaft housing, and the cylinder-head cover. Since the cylinder head comprises three parts, all of the oil channels can be formed in the casting pro cess which means that virtually no holes have to be drilled. Cleaning processes during production are no longer necessary and process safety is increased. The materials and production processes for the individual components are selected to suit the specific application. As a result, parts used for flat-base tappet bearings have a more wear-resistant material composition than those which take the valve seats. A distinction is therefore made according to the specific function and material.