Toyota Camry Hybrid AHV40 Manual page 197

D The liners are the spiny-type which have been manufactured so that their casting exteriors form large
irregular surfaces in order to enhance the adhesion between the liners and the aluminum cylinder block.
The enhanced adhesion helps heat dissipation, resulting in a lower overall temperature and heat
deformation of the cylinder bores.
D Water jacket spacers are provided in the water jacket of the cylinder block. They suppress the water flow
in the center of the water jackets, guide the coolant above and below the cylinder bores, and ensure uniform
temperature distribution. As a result, the viscosity of the engine oil that acts as a lubricant between the bore
walls and the pistons can be lowered, thus reducing friction.
ENGINE - 2AZ-FXE ENGINE
Irregularly shaped outer
casting surface of liner
A
A
A
A
Cylinder Block
A - A Cross Section
Water Jacket
Water
Jacket Spacer
A - A Cross Section
EG-9
Liner
01NEG27Y
01NEG28Y