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Toyota 1nz engine

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)

Description

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 tit 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)

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