The forged steel crankshaft is fully balanced with eight counterweights and supported by five main bearings. The cylinder block is an open-deck, midi-skirt die-cast aluminium type with cast-in iron liners and a die-cast aluminium lower crankcase and a stamped oil pan. The engine series features many advanced technologies including slant- squish combustion chambers, offset cylinder and crank centers, and the VVT-i continuously variable intake valve timing system. The AZ series uses an aluminium engine block with cast iron cylinder liners and aluminium DOHC cylinder head. The Toyota AZ engine family is a straight-4 piston engine series.
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June 2023
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