Toyota SZ engine
| Toyota SZ engine | |
|---|---|
1SZ-FE engine in transverse mounting | |
| Overview | |
| Manufacturer | Daihatsu, Toyota |
| Production | 1999–2022 |
| Layout | |
| Configuration | Naturally aspirated straight-4 |
| Displacement | 1.0 L (998 cc) 1.3 L (1,296 cc) 1.3 L (1,298 cc) 1.5 L (1,495 cc) |
| Cylinder bore | 69.0 mm (2.72 in) 72.0 mm (2.83 in) |
| Piston stroke | 66.7 mm (2.63 in) 79.6 mm (3.13 in) 79.7 mm (3.14 in) 91.8 mm (3.61 in) |
| Cylinder block material | Cast-iron |
| Valvetrain | DOHC 4 valves x cyl. with VVT-i |
| Compression ratio | 10.0:1, 11.0:1 |
| RPM range | |
| Max. engine speed | 6,500 rpm |
| Combustion | |
| Fuel system | Electronic fuel injection Port injection |
| Fuel type | Petrol |
| Cooling system | Water-cooled |
| Output | |
| Power output | 50–80 kW (67–107 hp; 68–109 PS) |
| Torque output | 90–141 N⋅m (66–104 lbf⋅ft) |
| Dimensions | |
| Dry weight | 68–102 kg (150–225 lb) |
| Chronology | |
| Predecessor | Toyota E engine Daihatsu H-series engine |
| Successor | Toyota NR engine (for some models) Toyota KR engine (I3, for 1SZ-FE) |
The Toyota SZ engine family is a series of compact straight-4 piston engines. Toyota Motor Manufacturing (UK) in Deeside produces SZ engines for the Yaris. All three types of the SZ engine are built in Tianjin FAW Toyota Engine Co., Ltd. (TFTE) Plant No. 1 in Xiqing District, Tianjin, China. The 2SZ-FE and 3SZ-VE variations are also manufactured by PT Astra Daihatsu Motor's Karawang Engine Plant in Indonesia.
This engine family has offset crankshaft center to cylinder center-line called the Désaxé, thin-wall cast-iron engine block, single-row chain-operated DOHC 4-valve, variable valve timing that allows Miller cycle operation for partial-throttle condition, and the 1.3L and 1.5L versions have the design to adopt to both longitudinal and transverse mounting. Further, these larger versions also adopt to longitudinal mounting with the engine canted nearly 90° to the left (exhaust-side down) for under-seat horizontal positioning.