Cylinder Head Assembly: Description and Operation

DESIGN
Cylinder heads are sand cast aluminum incorporating dual quench combustion chambers. Valve guides are hardenable iron inserts and valve seats are cast steel inserts, press fit into the cylinder head. A multilayer steel type gasket is used between head and block. High turbulence cylinder heads allow a 9.6:1 compression ratio.

VALVE TRAIN
Valve train has hydraulic roller lifters. Rocker arms are common either right or left, and installed on individual rocker arm pedestals attached to the cylinder head. Viton valve stem seals provide positive intake and exhaust valve sealing. Conventional type hollow push rods, retainers and valve stem locks are used. The relative high engine speed and high lift cam require dual valve springs. Valve spring seats are used to protect the aluminum cylinder heads and guides.