Toyota 2AZ-FE 2.4L Engine Specs, Problems & Reliability. The 2.4-liter inline-four 2AZ-FE engine belongs to the AZ-series and is produced from 2000. The 2AZ engine is larger displacement variation of the 1AZ engine from the same engine household. The essence of the 2AZ was replacing the old 5s engine.
Like 1AZ-FE, the 2AZ engine had an aluminum cylinder block with sleeves. The cylinder bore was increased to 88.5 mm, which needed utilizing bigger pistons compare to 1AZ pistons. For vibration decrease, there are 2 balancer shafts inside the crankcase. The engine has aluminum DOHC 16-valve cylinder head with variable valve timing system VVTi on the intake camshaft only. The 2AZ uses a timing chain to turn camshafts. There are no hydraulic lifters. The adjustment of valve clearance is required every 60,000 miles (100,000 km). These 2 engines are nearly identical expect the displacement.
In 2008 the engine was revamped. 2008+ engine produces more power and torque. The compression ratio rose from 9.6:1 to 9.8:1. The engine got new camshafts increasing red line to 6,500 rpm. There are oil squirters for cooling pistons spraying oil on the bottom side of pistons. Engine output depends upon the application: 161 hp (120 kW) for the Scion tC; 177 hp (132 kW) for the Rav4; 158 hp (118 kW) for the Camry, Corolla XRS, and Scion xB. In the very same year, Toyota likewise released the 2AR which supposed to change the 2AZ-FE from the production (however it is still readily available in some nations in our days).
Toyota 2AZ-FE 2.4L Engine Problems and Reliability
1. This engine takes in oil quiet significant due to the wrong piston rings style for North American Toyota designs. Oil usage generally begins after 45-50k miles.
2. The widespread problem is what cylinder head bolt threads break on back three middle bolts. This problem can be identified by coolant leak from the rear end of the engine. It might trigger a getting too hot too. The maker fixed this problem with the brand-new style of cylinder block in 2007.
3. The cylinder block is not rebuildable. You have to change it with brand-new or used in excellent condition if it is damaged.
Some other problems are similar to 1AZ-FE. That is not surprising, thinking about the truth that they are almost the very same. Without those drawbacks noted at the top, the engine is rather reputable and can run up to 180-200k miles.
Toyota 2AZ-FE 2.4L Engine Modifications
2AZ-FSE. Variation with direct fuel injection system Toyota D4. The engine has high compression ratio – 11.0:1. The 2AZ-FSE generates 161 hp (120 kW) at 5800 rpm and 170 lb ft (231 N m) of torque at 3800 rpm.
2AZ-FXE. This 2.4 liter variation works by Atkinson cycle. It shares the very same bore and stroke but pistons and camshafts were made special for this engine. 2AZ-FXE were created for hybrid automobiles: Toyota Camry Hybrid AHV40, Lexus HS 250h, Estima Hybrid. The engine is rated at 147 hp (108 kW) at 6000 rpm with 138 lb feet (187 N m) of torque at 4400 rpm.
Toyota 2AZ-FE 2.4L Engine Specs
|Manufacturer||Toyota Motor Manufacturing Kentucky, Inc.
|Production years||2000-present day|
|Cylinder block material||Aluminum|
|Cylinder head material||Aluminum|
|Fuel system||Fuel injection|
|Number of cylinders||4|
|Valves per cylinder||4|
|Type of internal combustion engine||Four-stroke, naturally aspirated|
9.8:1 (since 2008)
|Power, hp||160 hp (120 kW)/5,600|
|Torque, lb ft||162 lb-ft (220 Nm)/4,000|
|Engine weight||305 lbs (138 kg)|
|Engine oil weight||5W-30, 10W-30|
|Engine oil capacity, liter||4.3|
|Oil change interval, mile||6,000 (10,000 km) or 12 month|
|Applications||Toyota Camry, Toyota Matrix S (USA)/XR (Canada)/XRS, Pontiac Vibe, Toyota Corolla XRS, Toyota Camry Solara, Toyota RAV4, Toyota Highlander/Kluger/Harrier, Toyota Estima/Ipsum/Previa/Tarago, Toyota Alphard, Toyota Blade, Toyota Avensis, Scion tC, Scion xB, Toyota MarkX Zio|