Toyota 1NZ-FE/FXE 1.5L Engine
Here in this post, I have gathered information about the Toyota 1NZ-FE/FXE 1.5L Engine from its official website, including its specifications, Problems, and Reliability.
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This article, which has been updated, has all the information you require about the Toyota 1NZ-FE/FXE 1.5L Engine.
Originally released in 1997, the Toyota NZ family is a line of gasoline engines with a very modest displacement.
The XW10 Prius utilizes the 1NZ-FXE, a 1.5-litre four-cylinder gasoline engine, whereas the 1NZ-FE is a standard Otto cycle variant of this engine.
This 1.5L engine was used in Toyota vehicles such as the Yaris/Echo, Auris, Probox, Scion xB, and other compact sedans and hatchbacks sold primarily in Japan and Asia.
A smaller 1.3-liter 2NZ-FE engine is also available as part of the NZ series.
The 1NZ-cylinder FE’s block is an aluminium alloy “open deck” design, and its liners are thin-walled spiky-type cast iron.
8 mm is the distance between bores. The crankshaft is 12 mm off-centre from the centerline of the cylinder bores in the engine block’s intake configuration.
The crankshaft position was monitored by a sensor built into the forged steel crankshaft’s five journals.
The pistons in the 1NZ engine are made from aluminium alloy and feature semi-floating type piston pins, low-tension rings, and a friction-reducing polymer coating.
The connecting rods are made from forged steel.
Engine Specifications |
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| Engine code | Toyota 1NZ-FXE |
| Layout | Four-stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline (petrol) |
| Production | 1997- |
| Displacement | 1.5 L, 1,497 cm3 (91.35 cu in) |
| Fuel system | Electronic Fuel Injection (EFI) |
| Power adder | None |
| Power output | 76 PS (56 kW; 75 HP) at 5,000 rpm |
| Torque output | 110 Nm (11.2 kg·m; 81.2 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 head |
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| Valve Arrangement: | DOHC, chain drive | |
| Valves: | 16 (4 valves per cylinder) | |
| Valve head diameter: | INTAKE | 30.5 mm (1.20 in) |
| EXHAUST | 25.5 mm (1.00 in) | |
| Valve length: | INTAKE | 89.25 mm (3.5138 in) |
| EXHAUST | 87.90 mm (3.4606 in) | |
| Valve stem diameter: | INTAKE | 4.970-4.985 mm (0.1957-0.1963 in.) |
| EXHAUST | 4.965-4.980 mm (0.1955-0.1961 in.) | |
| Valve spring free length: | 59.77 mm (2.3531 in.) | |
| Camshaft cam height: | INTAKE | |
| EXHAUST | 44.046-44.146 mm (1.7341-1.7380 in.) | |
| Outer camshaft journal diameter: | №1 | 34.449-34.465 mm (1.3563-1.3569 in.) |
| Other journals diameter |
22.949-22.965 mm (0.9035-0.9041 in.)
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Valve clearance |
|
| Intake valve | 0.17-0.23 mm (0.007-0.009 in) |
| Exhaust valve | 0.27-0.33 mm (0.011-0.013 in) |
Compression pressure |
|
| Standard | 9.0 kg/m2 (128 psi) |
| Minimun | 7.0 kg/m2 (99 psi) |
| Compression differential limit between cylinders | 1.0 kg/m2 (14 psi) |
Oil system |
|
| Oil consumption, L/1000 km (qt. per mile) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 5W-30, 10W-30 |
| Oil type API | SJ or higher |
| Engine oil capacity (Refill capacity) | With filter change 3.4 l Without filter change 3,7 l |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
Ignition system |
|
| Spark plug | DENSO: SK16R11, NGK: IFR5A11 |
| Spark plug gap | 1.0-1.1 mm (0.039-0.043 in) |
Cylinder block |
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| Cylinder block alloy | Aluminium | |
| Compression ratio: | 13.0-13.5:1 | |
| Cylinder bore: | 75.0 mm (2.95 in) | |
| Piston stroke: | 84.7 mm (3.34 in) | |
| A number of piston rings (compression/oil): | 2 / 1 | |
| A 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 | 0.020-0.070 mm (0.0008-0.0027 in) |
| Second | 0.020-0.060 mm (0.0008-0.0024 in) | |
| Oil | 0.020-0.060 mm (0.0008-0.0024 in) | |
| Piston ring end gap: | Top | 0.20-0.30 mm (0.0079-0.0118 in) |
| Second | 0.30-0.45 mm (0.0118-0.0177 in) | |
| Oil | 0.10-0.40 mm (0.0039-0.0158 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) | |
VehicleApplications
| Model | Years Produced |
| Toyota Prius | – |
| Toyota Prius C | – |
| Toyota Yaris | – |
| Toyota Corolla (Axio/Fielder) | – |
| Toyota Sienna | – |
Toyota 1NZ-FE/FXE 1.5L Engine Problems & Reliability
Toyota 1NZ-FE/FXE 1.5L Engine FAQ
How strong is 1NZ engine?
Production ranges from 141 to 148 horsepower (105 to 110 kW; 143 to 150 PS) at 6000 rpm and 196 to 200 Newton-meters (145 to 148 lb-ft) of torque at 4200 to 4800 rpm.
The highest possible RPM is 6400.
What is the best engine oil for 1NZ?
CASTROL EDGE 5W-30 A3/B4
Can you turbo a 1NZ-FE?
The turbo kit will allow owners of the Toyota Vios with the 1NZ-FE engine to increase the vehicle’s performance.
Alternatively, a Toyota Vios can be turbocharged by installing a turbocharged engine in the vehicle’s engine compartment.
Setting up a turbocharger system for a Vios often involves installing a turbo kit.
Is 1NZ-FE a reliable engine?
Up to 100,000 kilometres, 1NZ-FE and FXE engines nearly never experience any issues. However, after that point, substantial oil consumption is to be expected, especially on extended rides at high rpm.
Stuck piston rings and faulty valve seals are the most common causes of excessive oil consumption.
Is 1NZ-FE a good engine?
One of the most trustworthy of Toyota’s newer engines, the 1NZ-FE, has an excellent reputation for dependability.