CYLINDER HEAD CONSTRUCTION [L3 Turbo]
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• A lightweight, quenched aluminum alloy with excellent heat conductance has been adopted for the cylinder head.
• Compact, pentroof-type combustion chambers have been adopted. The spark plugs are mounted at the top of the combustion chambers to improve combustion efficiency.
• The intake/exhaust port layout is a cross flow type, (the angle between two valves is 39°, there are two intake valves and two exhaust valves per cylinder) which improves air intake/exhaust efficiency.
• The cylinder head bolts are plastic region tightening bolts to be tightened in five motions to insure tightening stability.
• With the adoption of direct injection, the structure of the cylinder head consists of an injector with an edge that reaches the combustion chamber.
