Toyota UZ engine

The Toyota UZ engine family is a gasoline<ref name=WikiMotors>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> fueled 32-valve quad-camshaft V8 piston engine series used in Toyota's luxury offerings and sport utility vehicles.<ref name=uzguide>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> 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.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Toyota's UZ engine family was replaced by the UR engine family.

1UZ-FE

The Template:Convert 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 Template:Convert.<ref name=uzguide/> 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.Template:Cn

In its original, Japanese domestic market trim with 10.0:1 compression, power output is Template:Cvt, torque of Template:Convert.<ref name=uzguide/> The European-market version produces a claimed Template:Cvt.

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 Template:Convert at 5,400 rpm and torque of Template:Convert 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,<ref name=uzguide/> bumping power and torque to Template:Convert at 5,900 rpm and Template:Convert at 4,100 rpm. For the GS 400, output was rated at Template:Convert at 6,000 rpm and Template:Convert at 4,000 rpm.

The 1UZ-FE was voted to the Ward's 10 Best Engines list for 1998 through 2000.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>Template:Cite news</ref>

Applications (calendar years):

• 1989–2000 Lexus LS 400/Toyota Celsior<ref name="ward-1998-01-01">Template:Cite news</ref>
• 1989–2002 Toyota Crown/Toyota Crown Majesta
• 1989–2004 Toyota HiAce HiMedic Ambulance (Japan only)
• 1991–2000 Lexus SC 400/Toyota Soarer<ref name="ward-1998-01-01"/>
• 1992–1997 Toyota Aristo
• 1997–2000 Lexus GS 400<ref name="ward-1998-01-01"/>
• 1995–1997 SARD MC8/MC8-R
• 2006–2012 Mooncraft Shiden MC/RT-16 (non-production)

2UZ-FE

The 2UZ-FE was a Template:Convert 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 Template:Convert.<ref name=uzguide/> Output varies by implementation, but one VVT-i variant produces Template:Convert at 4800 rpm with Template:Convert of torque at 3400 rpm. JDM versions produce Template:Convert at 4800 rpm and Template:Convert at 3600 rpm, while Australian models produce Template:Convert at 4800 rpm and Template:Convert at 3600 rpm.<ref name=uzguide/>

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):<ref name="MSN Autos">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

• 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):<ref name="MSN Autos"/>

• 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 Template:Convert version built in Japan. Bore and stroke is Template:Convert .<ref name=uzguide/> Output is Template:Convert at 5600 rpm with Template:Convert 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.<ref name=uzguide/> The maximum engine speed is 6,500 RPM.

A 4.5 L version replaced the 3S-GTE as the engine used in Toyota's Template:Convert Super GT race cars up to 2009Template:Citation needed and a 5.0 L version was used in the Grand American Road Racing (Grand Am) Series.<ref>Template:Cite press release</ref>

Applications (calendar years):<ref name=uzguide/>

• 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)

Derivatives

FV2400-2TC

In 1997, the US Federal Aviation Administration granted production certification for the FV2400-2TC, a twin-turbocharged airplane powerplant based on the 1UZ-FE.<ref name=fv2400/> The Template:Convert FV2400 was developed in partnership with Hamilton Standard, which provided the digital engine-control system.<ref name=fv2400>Template:Cite news</ref> The goal was to produce a four-seat propeller aircraft.<ref>Template:Cite news</ref>

VT300i

In 1998, a marine derivative of the UZ powerplant was produced for boating applications. The 4.0 L VT300i engine, producing Template:Cvt at 6000 rpm and Template:Cvt 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<ref>Template:Cite magazine</ref>
• 1999–2001 Toyota Epic S22/SX22<ref>Template:Cite news</ref>
• 1999–2001 Toyota Epic X22<ref>Template:Cite news</ref><ref>Template:Cite news</ref>

See also

• List of Toyota engines