Toyota ZZ engine

Toyota ZZ engine
2005 Toyota Corolla S engine
Overview
Manufacturer	Toyota
Production	1997–2008
Layout
Configuration	Straight-4
Displacement	1.4 L; 85.3 cu in (1,398 cc) 1.6 L; 97.5 cu in (1,598 cc) 1.8 L; 109.5 cu in (1,794 cc) 1.8 L; 109.6 cu in (1,796 cc)
Cylinder bore	79 mm (3.11 in) 82 mm (3.23 in)
Piston stroke	71.3 mm (2.81 in) 81.5 mm (3.21 in) 85 mm (3.35 in) 91.5 mm (3.60 in)
Cylinder block material	Aluminium, Cast iron
Cylinder head material	Aluminium
Valvetrain	DOHC 4 valves x cyl. with VVT-i and VVTL-i (some versions)
Compression ratio	10.0:1, 11.5:1
Combustion
Supercharger	TRD (some versions)
Fuel system	Multi-point fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Chronology
Predecessor	A engine
Successor	ZR engine (for 1ZZ and 2ZZ series)

The Toyota ZZ engine family is a straight-4 piston engine series. The ZZ series uses a die-cast aluminium engine block with thin press-fit cast iron cylinder liners, and aluminium DOHC 4-valve cylinder heads.^[1] The camshafts are chain-driven. The two 1.8 L members of the family, the 1ZZ and 2ZZ, use different bore and stroke. The former was optimised for economy, with torque emphasised in lower revolutions per minute operating range, while the latter is a "square" design optimised for high-RPM torque, yielding higher peak power. The ZZ family replaced the extremely popular cast-iron block 4A engines.

Toyota engine names are interpreted as follows. The leading number denotes the generation, and the next one or two letters, specify the engine family. The remaining letters, following a hyphen, describe the engine's major features. For example, the 2ZZ-GE can be decoded as being the second generation of the ZZ engine series and features a performance-oriented cylinder head with widely angled valves (G) and electronic fuel injection (E).^[2]