Toyota UZ engine

The 4.0 L; 242.1 cu in (3,968 cc) 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 proved 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 cam belt. The connecting rods and crankshaft are constructed of steel. The pistons are hypereutectic.

1UZ-FE (rear view)

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.

In its standard, original trim with 10.0:1 compression, power output is 191 kW (256 hp; 260 PS), torque of 353 N⋅m (260 lb⋅ft).[2]

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 GS400, 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]
• 1992–2000 Lexus GS 400/Toyota Aristo[6]
• 1995–1997 SARD MC8/MC8-R

2UZ-FE

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, MFI 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
• 2003–2004 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 and electronic throttle control.

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)

3UZ-FE

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. It has an aluminum engine block and aluminum DOHC cylinder heads. It uses SEFI fuel injection, has 4 valves per cylinder with VVT-i. In 2003, the engine was linked to a six-speed automatic in applications with improved fuel efficiency.[2]

A 4.4L version replaced the 3S-GTE as the engine used in Toyota's 500 hp (373 kW) Super GT race cars up to 2009 and a 5.0L version was used in the Grand American Road Racing (Grand Am) Series.[8]

Applications (calendar years):[2]

• Lexus LS 430
• Lexus GS 430
• Lexus SC 430/Toyota Soarer
• Toyota Crown Majesta
• Super GT
  • Toyota Supra GT500 Race Car
  • 2006-2008 Lexus SC 430 GT500 Race Car
• 2009 Hongqi HQ430

Wikimedia Commons has media related to Toyota UZ engines.

• List of Toyota engines