Cylinder Head

• The cylinder head structure has been simplified by separating the cam journal portion (camshaft housing) from the cylinder head.

• The cylinder head, which is made of aluminum, contains a pentroof-type combustion chamber. The spark plug is located in the center of the combustion chamber in order to improve the engine's anti-knocking performance.

• The intake ports are on the inside and the exhaust ports are on the outside of the left and right banks respectively.

• Upright intake ports are used to improve the intake efficiency.

• A taper squish combustion chamber is used to improve anti-knocking performance and intake efficiency. In addition, engine performance and fuel economy have been improved.

• The siamese type intake port is used to reduce the overall surface area of the intake port walls. This prevents the fuel from adhering onto the intake port walls, thus reducing HC exhaust emissions.

Intake Valve

Spark

Plug

Hole

Exhaust Valve

Intake Side

Camshaft Housing pi

Intake Side

Spark

Plug

Hole

Exhaust Valve

Cylinder Head For Toyota Rav4

Intake Side

Upright Intake Port

Taper Squish A - A Cross Section

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Intake Side

Upright Intake Port

View from Back Side

Taper Squish A - A Cross Section

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Siamese Type

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