125000252 - 1016E CYLINDER HEAD/S - VARIOUS OPERATIONS

OPERATION

OPERATION

The cylinder head is one-piece in aluminium alloy and silicon.The four valves per cylinder are operated by two camshafts by means of hydraulic tappets.

The arrangement of the spaces allows the combustion chamber to house:

  • the four valve heads
  • the opening for the centre spark plug
  • the opening for the side spark plug
with the advantage of improving the thermal efficiency of the engine and reducing harmful exhaust emissions.
The valve guides are an interference fit in the cylinder head seats.A special reamer is used to produce the correct inner diameter after fitting.The gasket between cylinder head and crankcsae is metal and the head does not require retightening throughout the engine life.