| Home / Car Engines / Toyota Engines / Toyota 2AZ-FE |
Toyota 2AZ-FE Specifications
| Engine Model: Toyota 2AZ-FE |
| Engine Type: 4-cycle inline 4-cylinder DOHC VVT-i liquid-cooled gasoline |
| Total Displacement: 144 cu.in (2.36 L) |
| Rated Engine Power: 158-168 Hp (118-125 kW) at 5600 rpm |
| Fuel System Type: Sequential multi-point electronic fuel injection |
____________________________________________________________________________________
- Toyota 2AR-FE Engine Specifications
- Toyota 3UR-FE Engine Specifications
- Toyota 3RZ-FE Engine Specifications
| General Technical Data |
The Toyota 2AZ-FE is a 2.4-liter inline-four gasoline engine introduced in 2000 as part of the AZ family. It was designed to replace the older S-series engines such as the 5S-FE, offering modern features such as an aluminum block, DOHC valvetrain, and VVT-i (Variable Valve Timing - intelligent). The 2AZ-FE powered a wide range of Toyota and Lexus vehicles, including the Camry, RAV4, Highlander, Estima, Harrier, and Lexus ES240.
The engine was known for its smoothness,
efficiency, and longevity. With a displacement of 2362 cc, it provided
strong midrange torque while maintaining excellent fuel economy and
emissions compliance. The early version featured VVT-i on the intake
camshaft, while later updates introduced Dual VVT-i, improving breathing
efficiency and further optimizing combustion. Its lightweight
construction and chain-driven camshafts made it durable, quiet, and easy
to maintain. The 2AZ-FE remained in production for over a decade,
serving as one of Toyota’s most popular mid-size engine platforms.
The 2AZ-FE has a bore of 88.5 mm (3.48 inches) and a stroke of 96.0 mm
(3.78 inches), giving it a slightly undersquare configuration that
favors torque. The total displacement is 2362 cc (144 cubic inches). The
compression ratio varies depending on version and market: 9.6:1 for
early engines and up to 9.8:1 for later Dual VVT-i versions. The engine
block is cast aluminum alloy with thin cast-iron liners for durability
and heat resistance.
The open-deck design aids in cooling, and the
block is reinforced by cast ribs and a deep skirt structure for
rigidity. Five main bearings support the forged steel crankshaft.
Balance shafts located within the lower block assembly counteract
secondary vibration, contributing to smooth operation typical of
Toyota’s inline-fours. The pistons are aluminum alloy with
molybdenum-coated skirts, and the connecting rods are forged steel with
fracture-split big ends for accuracy and strength.
The cylinder head is aluminum alloy with dual overhead camshafts
operating four valves per cylinder. Valve diameters are approximately 34
mm (1.34 in) for intake and 29 mm (1.14 in) for exhaust. Early engines
employ VVT-i on the intake camshaft only, while later Dual VVT-i
versions vary both intake and exhaust timing, enhancing torque and
emissions performance. The valve clearance is adjusted with solid bucket
lifters and shims.
The timing mechanism uses a single-row roller chain with a hydraulic tensioner and guides. The firing order is 1-3-4-2. The redline is approximately 6,500 rpm, with an electronically controlled fuel cut around 6,800 rpm. Idle speed is controlled by the ECU, typically 700 ±50 rpm. Maximum power output for the 2AZ-FE ranges from 118 to 125 kW (158–168 horsepower) at 5600 rpm depending on configuration. Peak torque is between 220 and 230 Nm (162–170 lb-ft) achieved around 4000 rpm.
| Fuel System |
The 2AZ-FE utilizes a sequential multi-point electronic fuel injection (EFI) system. Each cylinder has an injector located in the intake port, spraying atomized fuel directly behind the intake valve. The fuel pressure is regulated at approximately 300 kPa (43 psi) and supplied by an electric in-tank pump. The ECU calculates injection pulse width based on inputs from the throttle position sensor, mass air flow sensor, oxygen sensor, crankshaft position sensor, and coolant temperature sensor.
The system uses a returnless fuel line in most versions to reduce evaporative emissions. The throttle is electronically controlled (ETCS-i) on later models, replacing the mechanical cable setup. The fuel injectors are high-impedance solenoid type, designed for quick response and fine atomization. Recommended fuel is unleaded gasoline with a minimum of 95 RON (91 AKI).
| Lubrication System |
The engine employs a full-pressure lubrication system using a trochoid-type oil pump driven by the crankshaft. Oil is filtered through a spin-on type full-flow paper element filter and distributed via internal galleries to the main bearings, connecting rods, camshafts, and valve train. Oil jets spray the undersides of the pistons to aid cooling. Oil pressure at 3000 rpm is approximately 400–600 kPa (58–87 psi).
The total oil capacity, including filter, is approximately 4.3 liters (4.5 US quarts). Recommended oil is SAE 5W-30 meeting API SJ or higher. The PCV valve maintains crankcase pressure balance and minimizes oil vapor. The oil filter should be replaced at each oil change, recommended every 10,000 km (6,000 miles) under normal service or more frequently under harsh conditions.
| Cooling System |
The 2AZ-FE uses a water-cooled system with a belt-driven centrifugal pump. Coolant circulates through the block, head, and radiator, maintaining uniform temperature distribution. The thermostat begins to open at 82°C (180°F) and is fully open at 95°C (203°F). Cooling fans are electrically controlled via the ECU. Total coolant capacity is approximately 6.5 liters (6.9 US quarts).
The system pressure cap is rated around 108 kPa (15.6 psi). Recommended coolant is a 50/50 mix of ethylene glycol and distilled water, providing freeze protection down to –35°C (–31°F). The radiator and heater core are aluminum. Coolant should be replaced every 160,000 km (100,000 miles) or five years. An engine coolant temperature sensor supplies data to both the ECU and dashboard gauge.
| Intake and Exhaust Systems |
The intake manifold is composite plastic with long runners for improved torque. The system incorporates a resonance chamber to reduce noise and enhance midrange response. Later Dual VVT-i models use an ACIS (Acoustic Control Induction System) that alters intake runner length with a vacuum-actuated valve.
The air filter is a dry paper element, replaced every 30,000 km (18,000 miles). The throttle body is either cable or electronically controlled depending on version. The exhaust manifold is stainless steel with a close-coupled catalytic converter for rapid light-off. Downstream oxygen sensors monitor catalyst efficiency. Some models include an air injection system to reduce emissions during cold starts.
| Ignition and Electrical System |
The ignition system is direct coil-on-plug (COP) type with four individual coils controlled by the ECU. Spark plugs are iridium-tipped and gapped at approximately 1.0 millimeter (0.039 inch). Spark plug replacement interval is typically 100,000 km (62,000 miles). The alternator is rated at 100–110 amperes, and the starter motor is a 1.2–1.4 kW reduction gear type.
Battery capacity is 45–60 ampere-hours. The ECU also controls ignition advance, idle speed, and fuel delivery for optimal combustion and emissions control. Ground straps ensure consistent electrical return and noise suppression.
| Other Systems |
The 2AZ-FE features comprehensive emission control components, including EGR (Exhaust Gas Recirculation), PCV, and EVAP systems. Oxygen sensors before and after the catalytic converter provide closed-loop feedback. Later versions comply with Euro 4 and ULEV-II emission standards. The drive-by-wire throttle incorporates idle air control. The ECU integrates adaptive learning and knock control for consistent performance with varying fuel qualities.
| Dimensions and Weight |
The 2AZ-FE engine measures approximately 610 mm (24.0 inches) in length, 640 mm (25.2 inches) in width, and 700 mm (27.6 inches) in height. The dry weight is about 136 kg (300 lbs). Mounting uses a four-point rubber-isolated system to minimize vibration transfer. The engine’s compact design suits both transverse and longitudinal configurations, making it versatile for multiple vehicle platforms.
| Maintenance Data |
Oil and filter replacement: every 10,000 km (6,000 mi) or 6 months.
Air filter replacement: every 30,000 km (18,600 mi).
Coolant replacement: every 160,000 km (100,000 mi) or 5 years.
Spark plug inspection: every 60,000 km (37,000 mi); replacement at
100,000 km (62,000 mi).
Drive belt inspection: every 40,000 km (25,000 mi).
Valve clearance check: every 100,000 km (62,000 mi).
Idle speed: 700 ±50 rpm.
Standard compression pressure: 1,275 kPa (185 psi) with a minimum of 980
kPa (142 psi).
Maximum cylinder difference: 100 kPa (15 psi).
| Tightening Torques |
Cylinder head bolts: 40 Nm (30 lb-ft) plus 90° plus 90°.
Main bearing cap bolts: 60 Nm (44 lb-ft).
Connecting rod bolts: 40 Nm (30 lb-ft) plus 90°.
Camshaft bearing cap bolts: 10 Nm (7 lb-ft).
Crankshaft pulley bolt: 180 Nm (133 lb-ft).
Flywheel bolts: 83 Nm (61 lb-ft) plus 90°.
Spark plugs: 25 Nm (18 lb-ft).
Oil drain plug: 40 Nm (30 lb-ft).
Intake manifold bolts: 25 Nm (18 lb-ft).
Exhaust manifold nuts: 35 Nm (26 lb-ft).
Engine mount bolts: 60 Nm (44 lb-ft).
| Vehicle Applications |
The Toyota 2AZ-FE engine powered a broad range of vehicles from 2000 to
2015.
Applications include:
– Toyota Camry (2001–2011, ACV30/40)
– Toyota RAV4 (2000–2012, ACA20/30)
– Toyota Highlander/Kluger (2000–2013)
– Toyota Harrier (2003–2013)
– Toyota Estima/Previa (2000–2016)
– Toyota Alphard (2002–2015)
– Toyota Ipsum/Picnic (2001–2010)
– Lexus ES240 (Asian market)
– Scion tC (2004–2010)
– Pontiac Vibe and Toyota Matrix (select models).
____________________________________________________________________________________
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Industrial Engines Technical Specifications |
| Outboard Engines Technical Specifications |