Toyota 1NZ-FE is a 1.5 L (1,497 cc, 91.35 cu-in) inline-four four-stroke naturally aspirated gasoline engine, production of which was launched in 1999 at Kamigo Plant.
It keeps a block of aluminum and a cylinder head featuring a double overhead camshaft and 4 valves for every cylinder. The compression index equals 10.5. The cylinder bore is 75 millimeters (2.95 inches), while the piston stroke is 84.7 millimeters (3.34 inches).
This motor features an electronic fuel injection system, VVT-i (Variable Valve Timing with intelligence) on the inlet part, ETCS-i (Electronic Throttle Control System with intelligence) plus a DIS-4 ignition system with a separate ignition coil for every spark plug.
1NZ-FE output is 109 hp (110 PS, 81 kW) at 6,000 rpm and a torque of 143 Nm (14.6 kg/m, 105.6 lb/ft) at 4,000 rpm.
1NZ-FE Engine Specs
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
|Layout||Four-stroke, Inline-4 (Straight-4)|
|Fuel type||Gasoline (petrol)|
|Displacement||1.5 L, 1,497 cm3 (91.35 cu in)|
|Fuel system||Electronic Fuel Injection (EFI)|
|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|
|Dimensions (L x W x H):||–|
|Weight||87 kg (191.2 lbs)|
1NZ-FE Cylinder Head and Camshaft Characteristics
1NZ-FE gained an aluminum cylinder head containing a water jacket betwixt exhaust port and spark plug boss, helping to retain the temperature necessary for the combustion chamber wall. Double overhead camshafts were controlled by a roller timing chain with an 8-millimeter pitch. Oil from oil jet got to the timing chain, lubricating it.
The chain was supplied with a chain tensioner, chain tension arm, and a chain guide to decrease motor sound and friction loss. A chain tensioner with a ratchet-type non-return system kept chain tension using spring and oil pressure. Monoblock aluminum timing chain covering closed-up cylinder block front and cylinder head. A gap was left in the cover for chain tensioner repair.
What Cars Have A Toyota 1NZ Engine?
- Toyota Vios/Belta
- Toyota Yaris/Echo
- Scion xA/ist
- Scion xB (1st generation)/Toyota bB (1st generation)
- Toyota Raum
- Toyota Porte
- Toyota Platz
- Toyota Ist
- Toyota Auris
- Toyota Fun Cargo
- Toyota Premio
- Toyota Allion
- Toyota Sienna
- WiLL VS
- Toyota Probox
- Toyota Ractis
- Toyota Corolla (Axio/Fielder, RunX, Allex)
- Geely CK (Produced under license)
- Geely MK (Produced under license)
- Great Wall C10
1NZ-FE engine control unit counted favorable valve timing from motor and car speed, mass air flow, throttle location, and water temperature inlets along with managing intake camshaft within the limits of 60 degrees of crankshaft angle. Thus, motor got valve overlap between -5 and 55 degrees. Additionally, the motor gained an intake duration of 225 degrees and an exhaust duration of 224 degrees.
Is 1NZ-FE a Good Engine?
In general – yes. Mileage on 1NZ-FE/FXE engines up to 100,000 miles is essentially flawless. However, after that point, expect significant oil usage, which usually rises with extended riding at high rpm.
1NZ-FE Engine Problems And Reliability
- Excessive oil consumption. Having run for more than 100,000 miles (150,000 kilometers), 1NZ motors begin to consume lots of oil. It’s necessary to substitute valve stem seals plus piston rings.
- Motor tapping. Being also common trouble of 1ZZ engine, it happens after engine runs more than 100,000-150,000 miles (150,000-200,000 kilometers) and means that the timing chain is tense. To escape from knocking, acquire a fresh timing chain. Additionally, it’s advisable to examine the timing chain tensioner.
- Rough idle. It’s reasonable to clean the throttle body plus the idle control valve.
- Motor whistling. Its reason is an outworn alternator belt, which is in need of thorough examination.
- High vibrations. Engine mounts, including anterior ones, require examination. Besides, dirty injectors along with outwearing fuel filter may cause vibrations. By cleaning injectors and placing a fresh filter, the problem will be solved.
Moreover, you may face troubles with oil pressure sensor malfunction and rear crankshaft oil seal leakage. As the cylinder block isn’t subjected to repairs, it’s necessary to buy a new motor after 150,000 miles (200,000 kilometers) run.
To prevent the majority of these malfunctions, it’s required to buy only good quality oil, as advised by Toyota. Besides, don’t forget to take care of it regularly.
The information provided in this article is for general informational purposes only. The author and publisher make no representations or warranties of any kind, express or implied, regarding the accuracy, adequacy, validity, reliability, availability, or completeness of any information presented. The reader is advised to consult a qualified professional, such as a mechanic or dealership, before making any decisions related to their vehicle's engine oil or maintenance.