Toyota 2AZ engine

2000 TO 2012
Overview
Manufacturer	Toyota Motor Corporation
Production	2000–2015
Chronology
Predecessor	Toyota S engine
Successor	Toyota AR engine

The Toyota AZ engine family is a straight-4 piston engine series. The AZ series uses an aluminium engine block with cast iron cylinder liners and aluminium DOHC cylinder heads. The engine series features many advanced technologies including slant-squish combustion chambers, offset cylinder and crank centers, and the VVT-i continuously variable intake valve timing system.

The 2AZ-FE is a 2.4 L (2362 cc) version built in Japan (Kamigo Plant and by Toyota Industries Corporation) and at TMMK in the USA, obtains a total displacement of 2362 cc with 88.5 mm (3.5 in) bore and 96.0 mm (3.8 in) stroke, with a compression ratio of 9.6:1. Output is 160 hp (120 kW) at 5600 rpm;162 lb·ft (220 N·m) of torque at 4000 rpm.

Later versions of the 2AZ-FE engine were upgraded with 9.8:1 compression ratio, a slightly more aggressive intake cam profile, 6500 rpm red line, and piston oil squirters. These later versions are rated at 161 hp (120 kW) in the Scion tC, 168 hp (125 kW) in the Rav4, and 158 hp (118 kW) in the Camry, Corolla XRS, and Scion xB. However, these latter 2AZ-FE models were the first to be rated under the new SAE J1349 standard. The new standard usually produces more conservative numbers, though no definitive comparison is available since the two versions were never tested by the same standard.The Rav 4 uses a different timing chain cover than the Camry, they can however be interchanged.

A TRD supercharger was available for the Scion tC until Spring 2009.

This engine is prone to "burning oil" issue starting after 45k miles, though mostly after 60k-75k miles. Toyota has even issued a TSB (Technical service bulletin) TSB #0094-11 in August 2011 but have refused to issue general recall. There are several class-action lawsuits underway regarding this widespread issue. In January 2015, Toyota caved in and issued extended warranty notification (ZE7) for this issue. However, Toyota still insists that burning 1 quart of oil every 1200 miles is "normal".

Applications:

• 2002–2011 Toyota Camry
• 2009–2011 Toyota Matrix S (USA)/XR (Canada)/XRS
• 2009–2010 Pontiac Vibe
• 2009–2010 Toyota Corolla XRS (2011-2013 only in Mexico)
• 2002–2008 Toyota Camry Solara
• 2004–2007 Toyota RAV4
• 2001–2007 Toyota Highlander/Kluger/Harrier
• Toyota Estima / Toyota Ipsum / Toyota Previa / Toyota Tarago
• Toyota Alphard
• Toyota Blade
• Toyota Avensis
• 2005–2010 Scion tC
• 2008–2015 Scion xB
• 2007-2013 Toyota MarkX Zio

Complete 2AZ-FE Engine

2AZ-FSE

The 2AZ-FSE is a 2.4 L (2362 cc) version. Bore is 88.5 mm and stroke is 96.0 mm, and a compression ratio of 11.0:1. Output is 163 PS (120 kW; 161 hp) at 5800 rpm with 231 N·m (170 lb·ft) of torque at 3800 rpm. The 2AZ-FSE features Toyota's D-4 direct injection system.

Applications:

• Toyota Avensis

2AZ-FXE

The 2AZ-FXE is an Atkinson cycle variant of the 2AZ-FE. It has the same bore and stroke, but the cams and pistons are unique. It has a physical compression ratio of 12.5:1.

The large valve overlap leads to a reduction in cylinder charge and reduced torque and power output, but efficiency is increased. This combination makes the 2AZ-FXE suitable for use only in hybrid vehicles, where peak torque and power demands can be met by the electric motor and battery.

Maximum output when used in the Camry hybrid is 147 hp (108 kW) at 6000 rpm with 138 lb·ft (187 N·m) of torque at 4400 rpm.

Applications:

• Toyota Alphard Hybrid
• Toyota Estima Hybrid
• 2007–2010 Toyota Camry Hybrid AHV40
• 2010–2012 Lexus HS 250h
• 2009– Toyota Sai

2AZ-FXE TOYOTA ESTIMA HYBRID 2-4 VVTI ENGINE