Patent ID: 8555627

Claim:
A one-piece liquid-cooled cylinder head and liquid-cooled exhaust manifold comprising: a cylinder head defining a gasket surface for attachment to a cylinder block of an internal combustion engine, a first internal cooling chamber, a first inlet channel extending from said gasket surface to said first cooling chamber, and a first outlet channel extending away from said first cooling chamber, an exhaust manifold defining a second internal cooling chamber spaced from said first cooling chamber, a second inlet channel extending from said gasket surface to said second cooling chamber, and a second outlet channel extending away from said second cooling chamber, said second outlet channel connecting with said first cooling chamber, and a valve in one of said first inlet channel, said first outlet channel, said second inlet channel and said second outlet channel, said valve being selected from a thermostat valve and an electric switching valve, so that liquid flow through said first and second cooling chambers can be separately adjusted.