Toyota 2AZ-FE Engine Problems, Specs and Reliability

The 2AZ-FE is a 2.4 L (2362 cc) version built in Japan (Kamigo Plant and by Toyota Industries Corporation), at TMMK in the USA and also built-in China for Scion xB models 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. The 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 engines were upgraded with 9.8:1 compression ratio, a slightly more aggressive intake cam profile, a 6500 rpm red line, and piston oil squirters. These later versions are rated at 161 hp (120 kW) in the Scion tC, 177 hp (132 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 Rav4 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. There have been complaints of this engine “burning oil” in North America, starting after 45k miles, though mostly after 60k-75k miles. Piston ring design has been identified as a problem. Toyota has even issued a TSB (Technical service bulletin) TSB #0094-11 in August 2011 but has refused to issue a general recall.

Also more convincingly reported as a head gasket problem 2AZ-FE aluminum block head bolt threads wear out on the back 3 middle bolts (closest to firewall). There are several class-action lawsuits underway regarding this widespread issue. In January 2015, Toyota North America caved in and issued an extended warranty notification (ZE7) for this issue. However, Toyota still insists that burning 1 quart of oil every 1200 miles is “normal”.

Toyota 2AZ-FE Engine Specs

Manufacturer	Toyota Motor Manufacturing Kentucky, Inc. Kamigo Plant Shimoyama Plant
Also called	Toyota 2AZ
Production	2000-present
Cylinder block alloy	Aluminum
Configuration	Straight-4
Valvetrain	DOHC 4 valves per cylinder
Piston stroke, mm (inch)	96 (3.78)
Cylinder bore, mm (inch)	88.5 (3.48)
Compression ratio	9.6 9.8 11 12.5
Displacement	2362 cc (144.1 cu in)
Power output (horsepower)	108 kW (149 HP) at 6,000 rpm 118 kW (160 HP) at 5,600 rpm 120 kW (162 HP) at 5,600 rpm 125 kW (170 HP) at 6,000 rpm
Torque output	187 Nm (138 lb·ft) at 4,400 rpm 218 Nm (161 lb·ft) at 3,800 rpm 220 Nm (162 lb·ft) at 4,000 rpm 224 Nm (165 lb·ft) at 4,000 rpm
Redline	6,500
HP per liter	63.1 67.7 68.6 72
Fuel type	Gasoline
Weight, kg (lbs)	138 (305)
2AZ-FE Fuel consumption, L/100 km (mpg) – City – Highway – Combined	for RAV4 XA20 13.0 (18) 8.6 (27) 10.8 (21)
Turbocharger	Naturally aspirated
Oil consumption, L/1000 km (qt. per miles)	up to 1.0 (1 qt. per 750 miles)
Recommended engine oil	5W-30 10W-30
Engine Oil Capacity, L (qt.)	4.3 (4.5)
Oil change interval, km (miles)	5,000-10,000 (3,000-6,000)
Normal engine operating temperature, °C (F)	~95 (203)
Engine lifespan, km (miles) -Official information -Real	– 300,000+ km (180,000 miles)

Torque Specifications

Part	N-m	Kgf-cm	Ft-lbs
Stiffering crankcase assy x Cylinder block	33	332	24
Oil control valve filter x Cylinder block	30	306	22
Cylinder block water drain cock	25	255	18
Cylinder head x cylinder block 1st 2nd	79 turn 90	806 Turn 90	58 Turn 90
Spark plug x cylinder head	19	194	14
Oil drain plug x oil pan	25	255	18

What Cars Have 2AZ Engines?

These vehicles are fully compatible with the 2AZ-FE motor:

• 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

2AZ-FSE Engine

The 2AZ-FSE is a 2.4 L (2362 cc) version. The bore is 88.5 mm, stroke is 96.0 mm, and the 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 Engine

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.

When used in the Camry hybrid, the maximum output 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
• 2007–2011 Toyota Camry Hybrid AHV40
• 2010–2012 Lexus HS 250h
• 2009– Toyota Sai

Toyota 2AZ Engine Problems and Reliability

The engine’s maintainability is practically zero. Saddles in the head are very thin with laser treatment, and it has a narrow neck of the valve. The engine is exposed to overheating.

The average life of 2AZ is about 200,000 miles, in case of proper maintenance.

The main mass defect of all AZ engines became apparent after a few years of operation and was more than critical. It is spontaneously destruction of the thread in holes for head bolts in the cylinder block, with seal failure, leaking of coolant through a gasket, possible overheating, mating surfaces warping, etc.

And many owners and repairers initially did not allow the thought of constructive miscalculation of Toyota and believed that the failure of the thread occurred due to overheating, whereas in reality, it was the opposite.

Officially the problem was recognized in 2007, after some modifications (the length of the thread in the block has increased from 24 to 30 mm). Initially, the manufacturer recommended replacing the damaged blocks assembly (defective part numbers – 11400-28130, -28490, -28050, the price is $3000-4000). As the warranty expired this method was unacceptable due to high cost, in practice the optimal was damaged thread reboring and threading to a larger diameter to install threaded inserts for standard bolts (it is recommended to “update” all holes preventive, not damaged only, and renew the head bolts).

Finally, in 2011 Toyota officially recommended a special repair kit “Time Sert,” with threaded inserts for post-warranty car repair.

Modification of blocks with a slight increase of thread length was definitely effective – if “head drop” for 2000-2006 cars was only a matter of time, for later cars this defect becomes non-typical.

Is The 2AZ-FE A Good Engine?

The Toyota 2AZ-FE is a decent engine. For many years, it’s been in Toyota vehicles and is still popular among Toyota drivers. The engine is recognized for its fuel efficiency and performance. If you’re seeking an inexpensive, dependable motor, the Toyota 2AZ-FE is a wonderful choice. Performance may be subpar by today’s standards, but the 2AZ-FE delivers respectable reliability and efficiency.

Toyota 2AZ Replacement Parts

This block presents spare parts that you can buy on Amazon. After all the commission can be paid to us. Nevertheless, we do not urge you to buy goods only in order to help our project – buy only those spare parts that you really need.

The information provided in this article is intended for informational and educational purposes only and should not be construed as professional mechanical advice. While the author has made every effort to ensure the accuracy and completeness of the information contained in this article, we make no warranties or representations as to the accuracy, completeness, reliability, or suitability of the information provided.

Any action you take upon the information provided in this article is strictly at your own risk, and we will not be liable for any losses, damages, or injuries incurred as a result of or in connection with the use of this information. It is strongly advised that you consult with a certified BMW mechanic or service center before attempting any maintenance or repair work.

Last update on 2023-12-06 / Affiliate links / Images from Amazon Product Advertising API