Toyota MZ engine

Toyota MZ engine
1MZ-FE engine in aToyota Windom
Overview
Manufacturer	Toyota Motor Corporation
Production	1993–2014
Layout
Configuration	V6
Displacement	2.5 L (2,496 cc) 3.0 L (2,994 cc) 3.3 L (3,310 cc)
Cylinder bore	87.5 mm (3.44 in) 92 mm (3.62 in)
Piston stroke	83 mm (3.27 in) 69.2 mm (2.72 in)
Cylinder blockmaterial	Aluminium alloy
Cylinder headmaterial	Aluminium alloy
Valvetrain	DOHC4 valves x cyl.
Combustion
Supercharger	TRD kit(in some versions)
Fuelsystem	Multi-port fuel injection
Fuel type	Gasoline
Cooling system	Water cooled
Output
Power output	194–242 hp (145–180 kW; 197–245 PS)
Torque output	180–242 lb⋅ft (244–328 N⋅m)
Chronology
Predecessor	Toyota VZ engine
Successor	Toyota GR engine

TheToyotaMZ engine familyis apistonV6 engineseries. The MZ series has an aluminium engine block and aluminium alloyDOHCcylinder heads.The cylinders are lined with cast iron, and is of a closed deck design (no open space between the bores). The engine is a 60 degree V6 design. It usesmulti-port fuel injection(MFI),four valves per cylinder,a one-piece cast camshaft and a cast aluminiumintake manifold.The MZ family is a lightweight V6 engine of an all-aluminium design, using lighter weight parts than the heavier duty VZ block engines in an effort to lower production costs, decrease engine weight, and decrease reciprocating weight without sacrificing reliability. Toyota sought to enhance the drivability pattern of the engine (over the 3VZ) at exactly 3000 rpm, since that was the typical engine speed for motors cruising on the highway. The result was less cylinder distortion coupled with the decreased weight of rotating assemblies, smoother operation at that engine speed, and increased engine efficiency.

This engine has been phased out in most markets, replaced by variants of the newGRseries.

1MZ-FE

Toyota 1MZ-FE engine without VVT-i

The1MZ-FEis a 3.0 L (2,994 cc) dual overhead cam (DOHC) V6 engine.Boreandstrokeis 87.5 mm × 83 mm (3.44 in × 3.27 in). Output is 194–201 hp (145–150 kW; 197–204 PS) at 5200–5400 rpm with 183–209 lb⋅ft (248–283 N⋅m) of torque at 4400 rpm. Horsepower ratings dropped after theSociety of Automotive Engineersimplemented a new power measurement system for vehicle engines, Toyota engines rated on 87 octane dropped the most, compared to the same engines used by Lexus rated on 91 octane. It has bucket tappets and was designed for good fuel economy of 19 mpg_‑US(12 L/100 km; 23 mpg_‑imp) city and 25 mpg_‑US(9.4 L/100 km; 30 mpg_‑imp) highway without an overall performance trade-off. These engines are prone to oil gelling. Another name for the issue was "engine sludge".There was a class action lawsuit due to this problem.It is very important to the life of these engines that oil changes are done on a regular basis.

The 1MZ-FE was onWard's 10 Best Engineslist for 1996.

Applications:

• 1993–2002Toyota Camry(V6)
• 2002–2006Toyota Camry (MCV36R)(Australian/New Zealand domestic market)
• 1993–2003Lexus ES 300&Toyota Windom(Japanese domestic market)
• 1994–2004Toyota Avalon& 2000 Toyota Pronard (Avalon for Japanese domestic market)
• 1997-2003Toyota Harrier(non-US markets)
• 1997–2002Toyota Sienna
• 1997–2001Toyota Mark II Wagon(Japanese domestic market)
• 1998–2003Toyota Solara(V6)
• 2000–2005Toyota Estima/Toyota Tarago/Toyota Previa

Toyota Racing Developmentoffered a bolt-onTRD supercharger kitfor the MY1997–2000 Camry, MY1998–2000 Sienna and MY1999–2000 Solara. Power output was bumped to 242 hp (180 kW; 245 PS) and 242 lb⋅ft (328 N⋅m) of torque.

The 1MZ-FE withVVT-iis used in the Avalon, Highlander, Sienna and Camry. Output is 210 hp (157 kW; 213 PS) at 5800 rpm with 222 lb⋅ft (301 N⋅m) of torque at 4400 rpm. Early versions of the VVT-i 1MZ used a dualthrottle body,cast aluminum intake manifold, and EGR block off plates on the exhaust manifolds. Later versions used a drive-by-wire/electronic throttle control.

Applications:

• 1998–2003Lexus RX 300(US market)
• 1999–2003Lexus ES 300
• 2000–2004Toyota Avalon
• 2000–2003Toyota Highlander/Kluger
• 2001–2003Toyota Sienna
• 2002–2008Toyota Alphard(Japanese domestic market)
• 2003–2006Toyota Camry(V6)

2MZ-FE

Toyota 2MZ-FE engine

The2MZ-FEis a 2.5 L (2,496 cc) engine replacing the 4VZ-FE as the worldwide 2.5 L V6. Bore and stroke is 87.5 mm × 69.2 mm (3.44 in × 2.72 in). Output is 197 hp (147 kW; 200 PS) at 6000 rpm with torque of 180 lb⋅ft (244 N⋅m) at 4600 rpm.

Applications:

• 1996-2001Toyota Camry(Japanese, NZ and some other Non-US markets)
• 1996-2001Toyota Windom(Japanese domestic market)
• 1997–2001Toyota Mark II Qualis(Japanese domestic market)

3MZ-FE

3MZ-FE in a 2004 Lexus ES330

The3MZ-FEis a 3.3 L (3,310 cc) version. Bore and stroke is 92 mm × 83 mm (3.62 in × 3.27 in). Output is 225 hp (168 kW; 228 PS) with 240 lb⋅ft (325 N⋅m) of torque in the Camry and 230 hp (172 kW; 233 PS) with 242 lb⋅ft (328 N⋅m) of torque in the Sienna and Highlander. It also featuresVVT-i,ETCS-i (Electronic Throttle ControlSystem — intelligent/DBW),PA6plastic intake, and increased throttle body diameter over the 1MZ. The 3MZ uses a new flat-type knock sensor, which is a departure from the typical resonator type knock sensor used on the previous MZs. Previous MZs had poor knock control, or perhaps oversensitivity when detecting knock, and power loss up to 20 hp (15 kW) may be realized due to erraticignition timingwhen using an octane lower than 91. The new flat-type knock sensor is a completely different design and detects more frequencies than the traditional resonator type. This provides theECUwith more accurate data. A bolt goes through the center of the knock sensor, which then mates the sensor to the block on each bank.

Applications:

• 2004-2007Toyota Highlander
• 2004–2008Toyota Camry Solara(V6)
• 2004–2006Toyota Sienna
• 2004–2006Toyota Camry (XV30)(SE V6)
• 2005–2010Toyota Highlander Hybrid(reduced power output)
• 2004–2006Lexus RX 330
• 2006–2008Lexus RX 400h(reduced power output)
• 2004–2006Lexus ES 330
• 2006-2014Mitsuoka Orochi

See also

• List of Toyota engines
• List of Toyota transmissions