Toyota 1AZ-FE/FSE 2.0 Engine: Overview and Features
The Toyota 1AZ-FE/FSE engine is one of the most common and successful engines from the Japanese automaker Toyota. Since its introduction in 2000, this engine has been installed in many car models, which confirms its high performance, reliability and durability.
Main Features
The 1AZ engine was developed at Kamigo Plant and Shimoyama Plant. It is an inline 4-cylinder engine with an aluminum cylinder block, which gives it light weight and excellent performance. The engine’s power supply system is based on injector technology, which enables efficient fuel utilization and reduced emissions.
| Characteristics | Reference |
|---|---|
| Production | Kamigo Plant, Shimoyama Plant |
| Engine make | 1AZ |
| Years of production | 2000-our days |
| Cylinder block material | Aluminum |
| Power system | Injector |
| Type | Ready |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 86 |
| Cylinder diameter, mm | 86 |
| Compression ratio | 9.6 9.8 10.5 11 |
| Engine displacement, cc | 1998 |
| Engine power, hp/rpm | 145/6000 150/5700 150/6000 152/6000 |
| Torque, Nm/rpm | 190/4000 193/4000 200/4000 |
| Fuel | 95 |
| Environmental regulations | Euro 5 |
| Engine weight, kg | 131 |
| Fuel consumption, l/100 km (RAV4 XA20) | City: 11.4 Highway: 7.3 Mixed: 9.8 |
| Oil consumption, gr./1000 km | To 1000 |
| Engine oil | 0W-20, 5W-20 |
| How much oil in the engine, l | 4.2 |
| Oil change is carried out, km | 10,000 (better 5,000) |
| Engine operating temperature, deg. | – |
| Engine life, thousand km | Factory data: n.a. In practice: 300+ |
| Tuning, hp | Potential: 200+ Without loss of resource: n.a.d. |
| The engine was installed on | Toyota Avensis, Toyota Caldina, Toyota Camry, Toyota RAV4, Toyota Vista, Toyota Premio, Toyota Avensis Verso, Toyota Noah/Voxy, Toyota Gaia, Toyota Isis, Toyota Wish, Toyota Allion, Toyota Opa |
Economy and Reliability
Despite producing up to 152 horsepower, the Toyota 1AZ engine is characterized by relatively low fuel consumption. For example, in the Toyota RAV4 XA20 fuel consumption is 11.4 liters per 100 kilometers in the city and 7.3 liters on the highway, which allows us to talk about its efficiency for its time.
With an engine resource that in practice can exceed 300 thousand kilometers, this motor has become one of the symbols of reliability among Toyota engines. It is important to follow the recommendations to change the oil every 10,000 kilometers, and under severe operating conditions – every 5,000 kilometers.
Engine 1AZ-FE/FSE has the potential for tuning with the possibility of increasing power up to 200 hp. However, serious modifications require a careful approach to maintain the resource and reliability of the engine.
Toyota 1AZ-FE/FSE engine is an example of a reliable, economical and productive engine, which has proven itself in various models of Toyota cars. With its help, cars get excellent performance characteristics, combining power, economy and durability.
Malfunctions and repair of the engine 1AZ-FE/FSE
Appeared in the 2000th year AZ series of Toyota engines, replaced in the post, popular and well-established, the family of S motors. In the new engines, the cylinder block became lightweight aluminum, used a system of variable valve timing VVTi on the intake shaft, used direct fuel injection (modification FSE), to reduce stress on the liners, the cylinder axis is displaced relative to the axis of the crankshaft, used electronic throttle and so on. Directly engine 1AZ-FE/FSE is a replacement of the well-known 3S-FE/FSE, but unlike its predecessor, the new engine modifications issue did not reach such a scale…
Modifications of the Toyota 1AZ engine
- 1AZ-FE is the basic motor of the series, compression ratio 9.6 and 9.8. Power is 145 and 150 hp. Produced engine from 2000 to the present time.
- 1AZ-FSE (D4) – analog of 1AZ-FE, but with direct fuel injection. Compression ratio, depending on the modification, is 9.8, 10.5 and 11. Engine power is respectively from 150 to 155 hp
Faults, problems 1AZ and their causes
- Breaking of threads in the block for fixing the cylinder head. The main problem of all AZ engines, symptoms: antifreeze on the back wall of the cylinder block, overheating, loss of geometry, block to the trash … Resolved by restoring the thread, or replacing the cylinder block on the updated 2007 year of release and younger, it was then the problem was eliminated.
- Engine vibration at idle. It manifests itself, as a rule, when the revolutions drop to 500-600 rpm and does not give a quiet life to owners. This is a feature of the motor with which it is useless to fight, you can clean the idle valve, throttle, injectors, EGR system (if available), dmrv, check the cushions, after all, it will partially help.
- The 1AZ engine is twitching. Clean the throttle block and fouling in the intake manifold with its flaps, the motor is prone to fouling, this will help. If the fault remains, look at the VVTi and lambda probe.
In addition, on models for the Japanese market equipped with EGR system, there is a traditional problem with the formation of carbon deposits and subsequent floating revs, loss of power and general dullness of the car. The problem is solved by cleaning or plugging the miracle valve. Overheating of the 1AZ engine is fraught with loss of geometry and replacement of the motor on a contract. FSE (D4) versions are very sensitive to fuel, filling the motor with slag, there is a chance to get to the replacement of the fuel injector and injectors, their cost is quite high. The timing chain is normal, on average goes more than 200 thousand kilometers, does not stretch and does not ask for replacement. Despite the disposability of the block, the engine resource is high, mileage over 300 thousand kilometers is not rare. In general, the motor is good, if you follow the condition and pour good oil, 1AZ will not let you down.
On the basis of this engine was produced and a larger volume counterpart, 2.4-liter 2AZ, about it a separate mention. In 2007, a new ZR series of Toyota engines was presented and the 3ZR model began to gradually supplant the 1AZ.
Tuning of Toyota 1AZ-FE/FSE engine
Chip tuning. Atmo
There are options for remodeling the engine into a 2.4 liter 2AZ, but the cost of such things is far beyond reason. Therefore, let’s consider the most relevant option for increasing power – supercharging.
Compressor on 1AZ-FE/FSE
On AZ engines, companies Blitz and TRD, produced ready compressor kits, you only need to buy, install, supplement it with intercooler, blouoff, thick cylinder-head gasket, 440cc injectors, Walbro 255 lph pump, remove the catalytic converter, or replace the exhaust with a straight-through diameter of 63 mm, adjust to Greddy E-manage Ultimate and get your 200 hp on a standard piston. You can leave the brains standard, but the ride will definitely be worse.
MOTOR RATING: 4-