Description
The Toyota 1NZ-FE is a 1.5 L (1,497 cc, 91.35 cu-in) straight-four 4-stroke natural aspirated gasoline engine from Toyota NZ-family. The 1NZ-FE engine was manufactured on Kamigo Plant since 1999.
The 1NZ-FE engine features a lightweight aluminum block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). Compression ratio rating is 10.5:1. Cylinder bore and piston stroke are 75.0 mm (2.95 in) and 84.7 mm (3.34 in), respectively.
The Toyota 1NZ-FE engine has electronic fuel injection system, VVT-i (Variable Valve Timing with intelligence) system on the intake side, ETCS-i (Electronic Throttle Control System-intelligent) and DIS-4 ignition system with individual ignition coil for each spark plug.
The 1NZ-FE engine was redesigned in 2003 due to the introduction of Euro IV emissions regulations. The following changes were made to the engine:
- Piston shape was changed;
- The shape of the exhaust manifold was modified;
- Construction of the three-way catalytic converter was changed;
- Three-way catalytic converter was fitted;
- The 16 bit ECU was changed to 32 bit.
The engine produced 110 PS (81 kW; 109 HP) at 6,000 rpm of maximum horsepower and 143 Nm (14.6 kg·m; 105.6 ft·lb) at 4,000 rpm of peak torque.
The breakdown of the engine code is as follows:
- 1 – 1-st generation engine
- NZ – Engine family
- F – Economy narrow-angle DOHC
- E – Multi Point Fuel Injection
| Engine Specifications | |
| Engine code | 1NZ-FE |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline (petrol) |
| Production | 1999- |
| Displacement | 1.5 L, 1,497 cm3 (91.35 cu in) |
| Fuel system | Electronic Fuel Injection (EFI) |
| Power adder | None |
| Power output | 110 PS (81 KW; 109 HP) at 6,000 rpm |
| Torque output | 143 Nm (14.6 kg·m; 105.6 ft·lb) at 4,000 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x W x H): | – |
| Weight | 87 kg (191.2 lbs) |
| Cylinder block | ||
| Cylinder block alloy | Aluminium | |
| Compression ratio: | 10.5:1 | |
| Cylinder bore: | 75.0 mm (2.95 in) | |
| Piston stroke: | 84.7 mm (3.34 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter (standard): | 75.000-75.013 mm (2.9527-2.9528 in) | |
| Piston skirt diameter (standard): | 74.945-74.955 mm (2.9506-2.9510 in) | |
| Piston pin outer diameter: | 18.001-18.004 mm (0.7087-0.7088 in) | |
| Piston ring side clearance: | Top | 0.030-0.070 mm (0.0012-0.0027 in) |
| Second | 0.020-0.060 mm (0.008-0.0024 in) | |
| Oil | 0.070-0.150 mm (0.0027-0.0059 in) | |
| Piston ring end gap: | Top | 0.25-0.35 mm (0.0098-0.0138 in) |
| Second | 0.35-0.50 mm (0.0138-0.0197 in) | |
| Oil | 0.10-0.35 mm (0.0039-0.0138 in) | |
| Crankshaft journal diameter: | 45.988-46.000 mm (1.8105-1.8110 in) | |
| Crankpin diameter: | 39.992-40.000 mm (1.5745-1.5748 in) | |
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