Cylinder Head

Cylinder Head

The cylinder heads in the new engines are designed as a single piece without a separate housing for the hydraulic bucket tappets. It was possible to reduce the weight of the new cylinder heads compared to the previous models (two-piece cylinder heads with a separate bucket tappet guide housing) by using an improved casting process.







Also on the new Boxster and Cayman models, the intake ports and valve-seat rings have been designed for optimized flow and production based on extensive simulations and form the basis for achieving high specific power output and torque values. The intake and outlet camshafts have also been re-adjusted for improved gas exchange. This allows both high maximum torque and power output values as well as high torque even at low engine speeds.







Cylinder-head gasket

To ensure the excellent sealing quality of the surface of the multi-layer steel seal, it is covered with high temperature-resistant plastic. The advantage of this steel seal is that the heat can be conducted very well away from the cylinder head.

Camshaft bearing

The camshafts are guided directly in the cylinder head by means of individual bearing saddles in the bearing seat. The camshaft bearings at the chain box are designed as bearing saddles. To avoid confusion, the bearing saddles are stamped with the matching numbers and the letters "E" for intake and "A" for exhaust.







Cylinder head cover

The cylinder head cover is a separate part made of light alloy. To ensure excellent sealing, a moulded elastomer seal is fitted between the cylinder head and cylinder head cover.