The cylinder head is the monolithic type made from aluminium alloy.The four valves per cylinder are mounted in their respective guides, operated by two camshafts via hydraulic tappets.The valve guides are installed by interference fit in their seats in the cylinder head.The inner diameter is finished off after assembly, using a specific reamer.The camshafts are fitted in two integral camshaft housings, without a tappet cover.The cylinder head gasket is the two layer metal type 0.5 mm thick and there is no need to retighten the cylinder head at all during the life of the engine.
