Engine 1UZ-FE V8 Toyota Lexus

Content

Specifications 1UZ-FE
Modifications
Problems
Where is the engine number
Tuning 1UZ-FE
Video review of the 1UZ-FE engine

The Toyota 1UZ-FE engine with a distributed injection system appeared on the market in 1989. This model is equipped with a contactless ignition system with 2 distributors and 2 coils, a timing belt drive. The volume of the unit is 3969 cubic meters. cm, maximum power - 300 liters. with. The 1UZ-FE has eight in-line cylinders. The pistons are made of a special alloy of silicon and aluminum, which ensures a tight fit to the cylinders and the durability of the entire engine.

Specifications 1UZ-FE

Engine displacement, cc	3968
Maximum power, hp	250 – 300
Maximum torque, N * m (kg * m) at rpm.	353 (36) to 4400 353 (36) to 4500 353 (36) to 4600 363 (37) to 4600 366 (37) to 4500 402 (41) to 4000 407 (42) to 4000 420 (43) to 4000
Fuel used	Petrol Premium (AI-98) Gasoline AI-95
Fuel consumption, l / 100 km	6.8 – 14.8
engine's type	V-shaped, 8-cylinder, 32-valve, DOHC
Add. engine information	VVTs
Maximum power, h.p. (kW) at rpm	250 (184) to 5300 260 (191) to 5300 260 (191) to 5400 265 (195) to 5400 280 (206) to 6000 290 (213) to 6000 300 (221) to 6000
Compression ratio	10.5
Cylinder diameter, mm	87.5
The piston stroke, mm	82.5
Number of valves per cylinder	4

Modifications

In 1995, the model was revised: the compression level was increased from 10,1 to 10,4, and the connecting rods and pistons were lightened. Power increased to 261 hp. from. (in the original version - 256 liters. from.) The torque was 363 N * m, which is 10 units more than the value in the original version.

In 1997, a VVT-i gas phase distribution system was installed, and the compression level increased to 10,5. Such changes made it possible to increase power up to 300 horsepower, torque - up to 407 N * m.

Thanks to such modifications in 1998-2000. the 1UZ-FE engine was included in the TOP-10 of the best engines of the year.

Problems

With proper maintenance, 1UZ-FE does not give car owners "headaches". You only need to change the oil every 10 km and change the timing belts, as well as spark plugs after 000 km.

The power parts of the motor are quite durable. However, the unit contains many attachments that, when used, can wear out earlier than expected. In the new versions, the most "capricious" contactless ignition system, which at the slightest breakdown requires only professional intervention and does not tolerate amateur performance.

Another problematic element is the water pump. The bending moment of the belt constantly acts on it, and the pump loses its tightness. The car owner needs to regularly check the condition of this element, otherwise the timing belt may break at any time.

Where is the engine number

The engine number is located in the center of the block, just behind the radiator.

Tuning 1UZ-FE

To increase the power of the Toyota 1UZ-FE, you can install a turbo kit based on the Eaton M90. It is recommended to purchase a fuel regulator and direct-flow exhaust for it. This will allow reaching a pressure of 0,4 bar and developing power up to 330 "horses".

To obtain a power of 400 liters. from. you will need ARP studs, forged pistons, 3-inch exhaust, new injectors from the 2JZ-GTE model, Walbro 255 lph pump.

There are also turbo kits (Twin turbo - for example, from TTC Performance), which allow you to inflate the engine up to 600 hp, but their cost is very high.

Cars on which the 1UZ-FE engine was installed:

Lexus LS 400 / Toyota Celsior;
Toyota Crown Majesta;
Lexus SC 400 / Toyota Soarer;
Lexus GS 400 / Toyota Aristo.

Toyota 1UZ-FE engines are popular with motorists who prefer to carry out various manipulations on their car. Despite the recommendations for using such motors on Japanese cars, drivers successfully equip domestic cars with them, improving their characteristics.