2585384 - Introduction - CYLINDER HEAD/S (BIPOWER)
The cylinder head is the monolithic type made from aluminium alloy. The two valves per cylinder are mounted in their respective guides, operated by a camshaft via mechanical tappets and adjustment shims.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 cylinder head gasket is of the Aramide fibre type, and there is no need to retighten the cylinder head at all during the life of the engine.
DESCRIPTION
The cylinder head is the top part of the engine, secured by bolts (or studs) to the engine block.It is of determining importance for the characteristics of a propulsion unit, on which performance, consumption and polluting emissions depend.Together with the piston crown, it determines the shape of the combustion chambers.It houses the valves, in nearly all engines, and the entire timing gear.The following elements make up the cylinder head:
- camshaft
- camshaft bearings
- tappets
- lubrication pipe
- inlet and exhaust valves
- valve guides
- valve seats
- tappet cover
- studs for fixing exhaust and inlet manifolds
The head contains:
- inlet ducts (with Venturi pipe shaped profile) (1)
- exhaust ducts; valve seats
- coolant ducts
- lubricant ducts; threaded spark plug seats
- the holes for attachment to the engine block, and the combustion chambers.
