Toyota UZ engine

The 4.0 L (3,969 cc; 242.2 cu in) all-alloy 1UZ-FE debuted in 1989 in the first generation Lexus LS 400/Toyota Celsior and the engine was progressively released across a number of other models in the Toyota/Lexus range. The engine is oversquare 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. The connecting rods and crankshaft are constructed of steel. The pistons are hypereutectic.

 

The FV2400-2TC derivative is one of the few road-going engines that is FAA 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's VVT-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 the Ward's 10 Best Engines list for 1998 through 2000.^[4][5]

Applications (calendar years):

• 1989–2000 Lexus LS 400/Toyota Celsior^[6]
• 1989–2002 Toyota Crown/Toyota Crown Majesta
• 1989–2004 Toyota HiAce HiMedic Ambulance (Japan only)
• 1991–2000 Lexus SC 400/Toyota Soarer^[6]
• 1992–1997 Toyota Aristo
• 1997–2000 Lexus GS 400^[6]
• 1995–1997 SARD MC8/MC8-R
• 2006–2012 Mooncraft Shiden MC/RT-16 (non-production)

 

The 2UZ-FE was a 4.7 L; 284.6 cu in (4,663 cc) version built in Tahara, Aichi, Japan and at Toyota 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 aluminum DOHC 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 the 1UR-FE or 3UR-FE, depending on the country.

Applications (calendar years):^[7]

• 2002–2004 Lexus GX 470
• 1998–2005 Lexus LX 470
• 1998–2005 Toyota Land Cruiser
• 2002–2004 Toyota 4Runner
• 1999–2004 Toyota Tundra
• 2000–2004 Toyota Sequoia

Toyota Racing Development offered a bolt-on supercharger kit for the 2000–2003 Tundra/Sequoia and the 1998–2003 LX 470.

Another 2UZ-FE variation adds VVT-i, electronic throttle control, and a plastic intake manifold.

Applications (calendar years):^[7]

• 2004–2009 Lexus GX 470
• 2005–2007 Lexus LX 470
• 2005–2009 Toyota 4Runner
• 2005–2011 Toyota Land Cruiser
• 2005–2009 Toyota Tundra
• 2004–2009 Toyota Sequoia
• 2007–2012 Lexus LX 470 (Hong Kong only)

 

The 3UZ-FE is a 4.3 L; 261.9 cu in (4,292 cc) version built in Japan. 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 a DOHC valvetrain with 4 valves per cylinder and VVT-i. It uses SEFI fuel 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 4.5L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (373 kW) Super GT race cars up to 2009^{[citation needed]} and a 5.0L version was used in the Grand American Road Racing (Grand Am) Series.^[8]

Applications (calendar years):^[2]

• Lexus LS 430 (2000–2006)
• Lexus GS 430 (2000–2007)
• Lexus SC 430/Toyota Soarer (2001–2010)
• Toyota Crown Majesta (2004–2013)
• Hongqi HQ430 (2006–2010)
• Super GT
  • Toyota Supra GT500 Race Car (2003-2005)
  • Lexus SC 430 GT500 Race Car (2006–2008)

In 1997, the US Federal Aviation Administration granted production certification for the FV2400-2TC, a twin-turbocharged airplane powerplant based on the 1UZ-FE.^[9] The 360 hp (268 kW; 365 PS) FV2400 was developed in partnership with Hamilton 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):

• 1998 Toyota Epic S21^[11]
• 1999–2001 Toyota Epic S22/SX22^[12]
• 1999–2001 Toyota Epic X22^[13][14]

 

Wikimedia Commons has media related to Toyota UZ engines.

• List of Toyota engines