| Toyota UZ Engine | |
|---|---|
 3UZ-FE engine | |
| Overview | |
| Manufacturer | Toyota Motor Corporation |
| Production | 1989–2013 |
| Layout | |
| Configuration | 90°V8 |
| Valvetrain | DOHC4 valves x cyl. w/VVT-i |
| Combustion | |
| Fuel system | Multi-point fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 191–373 kW (256–500 hp; 260–507 PS) |
| Torque output | 353–441 N⋅m (260–325 lb⋅ft) |
| Chronology | |
| Predecessor | Toyota V engine |
| Successor | Toyota UR engine |
TheToyota UZ engine family is agasoline[1] fueled32-valvequad-camshaftV8piston engine series used in Toyota's luxury offerings andsport utility vehicles.[2] Three variants have been produced: the 1UZ-FE, 2UZ-FE, and 3UZ-FE. Production spanned 24 years, from 1989 to mid 2013, ending with the final production of the 3UZ-FE-powered Toyota Crown Majesta I-FOUR.[3] Toyota's UZ engine family was replaced by theUR engine family.
| 1UZ-FE | |
|---|---|
 1UZ-FE (rear view) | |
| Layout | |
| Displacement | 4.0 L (3,969 cc) |
| Cylinder bore | 87.5 mm (3.44 in) |
| Piston stroke | 82.5 mm (3.25 in) |
The 4.0 L (3,969 cc; 242.2 cu in) all-alloy1UZ-FE debuted in 1989 in the first generationLexus LS 400/Toyota Celsior and the engine was progressively released across a number of other models in the Toyota/Lexus range. The engine isoversquare by design, with a bore and stroke size of 87.5 mm × 82.5 mm (3.44 in × 3.25 in).[2] It has proven to be a strong, reliable and smooth powerplant with features such as 6-bolt main bearings and belt-driven quad-camshafts. The water pump is also driven by the timing/cam belt. Theconnecting rods andcrankshaft are constructed of steel. The pistons arehypereutectic.
TheFV2400-2TC derivative is one of the few road-going engines that isFAA approved for use in an airplane.
Its resemblance to a race engine platform (6 bolt cross mains and over square configuration) was confirmed in 2007 by David Currier (in an interview with v-eight.com), vice president of TRD USA, stating that the 1UZ platform was based on CART/IRL engine design. It was planned to be used on GT500 vehicles, however its subsequent use in the Daytona Prototype use had not been planned.[citation needed]
In its original, Japanese domestic market trim with 10.0:1 compression, power output is 191 kW JIS (256 hp; 260 PS), torque of 353 N⋅m (260 lb⋅ft).[2] The European-market version produces a claimed 245 PS DIN (180 kW; 242 hp).
The engine was slightly revised in 1995 with lighter connecting rods and pistons and an increased compression ratio to 10.4:1 resulting in peak power of 195 kW (261 hp; 265 PS) at 5,400 rpm and torque of 365 N⋅m (269 lb⋅ft) at 4,400 rpm.
In 1997, Toyota'sVVT-i variable valve timing technology was introduced along with a further compression ratio increase to 10.5:1,[2] bumping power and torque to 216 kW (290 hp; 294 PS) at 5,900 rpm and 407 N⋅m (300 lb⋅ft) at 4,100 rpm. For the GS 400, output was rated at 224 kW (300 hp; 305 PS) at 6,000 rpm and 420 N⋅m (310 lbf⋅ft) at 4,000 rpm.
The 1UZ-FE was voted to theWard's 10 Best Engines list for 1998 through 2000.[4][5]
Applications (calendar years):
| 2UZ-FE | |
|---|---|
 | |
| Layout | |
| Displacement | 4.7 L (4,664 cc) |
| Cylinder bore | 94 mm (3.70 in) |
| Piston stroke | 84 mm (3.31 in) |
The2UZ-FE was a 4.7 L; 284.6 cu in (4,663 cc) version built inTahara, Aichi,Japan and atToyota Motor Manufacturing Alabama. Unlike its other UZ counterparts, this version uses a cast iron block to increase durability, as it was designed for low-revving, high-torque pickup and SUV applications. Its bore and stroke is 94 mm × 84 mm (3.70 in × 3.31 in).[2] Output varies by implementation, but one VVT-i variant produces 202 kW (271 hp; 275 PS) at 4800 rpm with 427 N⋅m (315 lb⋅ft) of torque at 3400 rpm.JDM versions produce 173 kW (232 hp; 235 PS) at 4800 rpm and 422 N⋅m (311 lb⋅ft) at 3600 rpm, while Australian models produce 170 kW (228 hp; 231 PS) at 4800 rpm and 410 N⋅m (302 lbf⋅ft) at 3600 rpm.[2]
Like the 1UZ-FE, it has aluminumDOHC cylinder heads,multi-port fuel injection, 4 valves per cylinder with bucket tappets, one-piece cast camshafts, and a cast aluminum intake manifold. For 2010, it was replaced by the1UR-FE or3UR-FE, depending on the country.
Applications (calendar years):[7]
Toyota Racing Development offered a bolt-onsupercharger kit for the 2000–2003 Tundra/Sequoia and the 1998–2003 LX 470.
Another 2UZ-FE variation addsVVT-i,electronic throttle control, and a plastic intake manifold.
Applications (calendar years):[7]
| 3UZ-FE | |
|---|---|
 | |
| Layout | |
| Displacement | 4.3 L (4,293 cc) |
| Cylinder bore | 91 mm (3.58 in) |
| Piston stroke | 82.5 mm (3.25 in) |
The3UZ-FE is a 4.3 L; 261.9 cu in (4,292 cc) version built inJapan. Bore and stroke is 91 mm × 82.5 mm (3.58 in × 3.25 in).[2] Output is 216 to 224 kW (290 to 300 hp; 294 to 305 PS) at 5600 rpm with 441 N⋅m (325 lb⋅ft) of torque at 3400 rpm. The engine block and heads are aluminum. It has aDOHC valvetrain with 4 valves per cylinder andVVT-i. It uses SEFIfuel injection. In 2003, the engine was paired with a six-speed automatic transmission, resulting in improved fuel economy over the previous five-speed automatic.[2] The maximum engine speed is 6,500 RPM.
A 4.5 L version replaced the3S-GTE as the engine used in Toyota's 500 hp (373 kW)Super GT race cars up to 2009[citation needed] and a 5.0 L version was used in the Grand American Road Racing (Grand Am) Series.[8]
Applications (calendar years):[2]
In 1997, the USFederal Aviation Administration granted production certification for the FV2400-2TC, atwin-turbocharged airplane powerplant based on the 1UZ-FE.[9] The 360 hp (268 kW; 365 PS) FV2400 was developed in partnership withHamilton Standard, which provided the digital engine-control system.[9] The goal was to produce a four-seat propeller aircraft.[10]
In 1998, a marine derivative of the UZ powerplant was produced for boating applications. The 4.0 L VT300i engine, producing 224 kW; 304 PS (300 hp) at 6000 rpm and 420 N⋅m (310 lb⋅ft) at 4200 rpm, used the same block as the UZ engine on the Lexus SC 400, GS 400, and LS 400.
Applications (calendar years):
