Toyota 2AZ-FE 2.4L Engine Specs, Problems & Reliability

Here in this post, I have gathered information about the Toyota 2AZ-FE 2.4L Engine from its official website, including its specifications, Problems, and Reliability.

We believe in providing reliable information to our readers, therefore we prefer to obtain information on the Toyota 2AZ-FE 2.4L Engine from authentic sources.

This article, which has been updated, has all the information you require about the Toyota 2AZ-FE 2.4L Engine.

The AZ-series 2AZ-FE inline-four engine, displacing 2.4 litres, goes into production in 2000. The 2AZ engine is a variant of the 1AZ with a larger displacement.

The 2AZ was developed primarily to serve as a replacement for the 5S engine.

Toyota 2AZ-FE 2.4L Engine

The cylinder block of the 2AZ engine was made of aluminium, and it included sleeves, just as in the 1AZ-FE. Since the cylinder size was enlarged to 88.5 mm, larger pistons than those used in the 1AZ were necessary.

There are two balancer shafts located within the crankcase to help dampen vibrations. VVTi is exclusively installed on the intake camshaft of the engine’s aluminium DOHC 16-valve cylinder head.

The camshafts in a 2AZ are rotated by means of a timing chain. To my knowledge, there are no hydraulic lifts available.

Every 60,000 miles, you’ll need to check and adjust your valve clearance (100,000 km).

With the exception of their displacement, these two motors are virtually identical.

Engine Specifications

Engine code2AZ-FE
LayoutFour-stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Production2000-
Displacement2.4 L, 2,362 cm2 (144.14 cu-in)
Fuel systemSequential MPFI
Power adderNone
Power outputFrom 147 PS (108 kW; 145 HP) at 6,000 rpm
to 170 PS (125 kW; 168 HP) at 6,000 rpm
Torque outputFrom 187 Nm (19.1 kg·m; 138.0 ft·lb) at 4,400 rpm
to 224 Nm (22.9 kg·m; 165.3 ft·lb) at 4,000 rpm
Firing order1-3-4-2
Dimensions (L x W x H):
WeightM/T: 127 kg (280 lb)
A/T: 121 kg (267 lb)

Cylinder block

Cylinder block alloyAluminium
Compression ratio:9.6:1 or 9.8:1
Cylinder bore:88.5 mm (3.48 in)
Piston stroke:96.0 mm (3.78 in)
A number of piston rings (compression/oil):2 / 1
A number of main bearings:5
Cylinder inner diameter (standard):88.500-88.513 mm (3.4842-3.3848 in)
Piston skirt diameter (standard):88.439-88.449 mm (3.4818-3.4822 in)
Piston pin outer diameter:21.997-22.009 mm (0.8660-0.8665 in)
Piston ring side clearance:Top0.030-0.080 mm (0.0012-0.0031 in)
Second0.020-0.060 mm (0.0008-0.0024 in)
Oil0.020-0.070 mm (0.0008-0.0028 in.)
Piston ring end gap:Top0.22-0.32 mm (0.0087-0.0126 in.)
Second0.50-0.60 mm (0.0197-0.0236 in.)
Oil0.10-0.35 mm (0.0039-0.0138 in.)
Crankshaft main journal diameter:54.998-55.000 mm (2.1652-2.1653 in)
Crankpin diameter:47.990-48.000 mm (1.8894-1.8898 in)

Valve clearance (HOT)

Intake valve0.19-0.29 mm (0.007-0.011 in)
Exhaust valve0.30-0.40 mm (0.012-0.016 in)

Compression pressure

Standard13.0 kg/m2 / 200 rpm
Minimun11.0 kg/m2 / 200 rpm
Compression differential limit between cylinders1.0 kg/m2 / 200 rpm

Oil system

Oil consumption, L/1000 km (qt. per mile)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil5W-20, 5W-30, 10W-30
Oil type API  SJ
Engine oil capacity (Refill capacity)With filter change: 3.8 litres (4.0 US qts, 3.3 Imp. qts)
Without filter change: 3.6 liters (3.8 US qts, 3.2 Imp. qts)
Oil change interval, km (miles)10,000 (6,000)
Oil Pressure, kPa (bar, kg/cm 2, psi)Idle speed: More than 60 (0.6, 0.61, 9)
2,000 rpm: More than 270 (2.7, 2.8, 39)

Ignition system

Spark plugDENSO: SK20R11 NGK: IFR6A11
Spark plug gap1.1 mm (0.043 in)

Cylinder head

Valve Arrangement:DOHC, chain drive
Valves:16 (4 valves per cylinder)
Valve head diameter:INTAKE34.0 mm (1.3385 in)
EXHAUST29.5 mm (1.1614 in)
Valve length:INTAKE101.71 mm (4.004 in)
EXHAUST101.21 mm (3.984 in)
Valve stem diameter:INTAKE5.470-5.485 mm (0.2153-0.2159 in)
EXHAUST5.465-5.480 mm (0.151 – 0.2157 in)
Valve spring free length:45.7 mm (1.7990 in)
Outer camshaft journal diameter:№135.971-35.985 mm (1.4162-1.4167 in)
№2, 3, 4, 522.959-22.975 mm (0.9039-0.9045 in)

Toyota 2AZ-FE 2.4L Engine  Problems 

Two Thousand Four: Oil Consumption Problems with the 2.4-litre Engine

One of the most talked-about issues with Toyota 2AZ-FE engines is their excessive need for oil. The 2.4-litre inline-4 engine’s reputation for oil consumption has been widely criticized.

Besides a service bulletin from Toyota, there have been class-action lawsuits filed over similar issues. The problem of high oil consumption in the 2AZ FE is not unknown.

Oil consumption is most likely due to poorly designed piston rings.

If the clearance is too great, the oil will leak past the piston rings and be burned up in the engine’s combustion chamber.

The Toyota 2.4 engine is not alone in experiencing this problem. In other words, excessive oil use is not always negative.

Using 2AZ-FE oil doesn’t appear to compromise a vehicle’s dependability or lifespan. The most crucial step is to check the oil level frequently and add more if necessary.

Overworking an already stressed engine might result in total failure if oil levels drop too low for too long.

If you keep the oil tank full, oil consumption shouldn’t have much of an effect on the durability or dependability of your 2AZ FE.

The combustion of carbon dioxide in the issues of the 2AZ-FSE cause.

A possible issue with the 2AZ-FSE, a member of Toyota’s 2AZ engine family, is carbon buildup.

Only 2AZ-engined Toyota Avensis vehicles feature the FSE engine.

Therefore, most operating 2AZ FE engines are not affected, so we’ll keep this brief.

In any case, oil blow-by is a normal byproduct of all engines. The oil gets into the intake ports and clings to the inside surfaces and the valves.

On port-injection engines, where fuel is poured directly into the ports, this is rarely a problem. The detergents in the gas then clean away the residue.

The 2AZ-FSE, on the other hand, uses a direct injection system and sprays fuel straight into the cylinder.

Since oil spills cannot be cleaned, the resulting carbon buildup hardens over time.

Cleaning carbon deposits from intake valves with walnut blasting is a common practice. On average, DI engines should be serviced every 100,000 to 130,000 miles.

Cleaning the valves is a labour-intensive task that might set you back between $300 and $600.

Oil Leaks in the Toyota Basin (2AZ-FE)

So, this recent 2AZ-FE engine issue is rather a standard fare. To get to the 2AZ FE reliability section and close out the article, we shall move at a brisk pace.

Regardless, oil leaks are a common problem in older gasoline-powered vehicles. Rubber or a rubber-like material is commonly used for gaskets, seals, O-rings, hoses, etc.

These components deteriorate naturally with time and use.

Oil leaks occur as a result of tiny cracks that appear over time. These cracks will continue to widen and the oil leaks will worsen if nothing is done.

Oil leaks on 2AZ-FE engines typically occur at the valve cover gaskets, timing case lid, and main seals. The latter, while not the only possible source of leakage, appears to be the more frequent.

Toyota 2AZ-FE 2.4L Engine Reliability

Does anyone know if the Toyota 2AZ-FE engine can be counted on? We agree that this motor receives satisfactory to excellent dependability ratings.

Though the 2AZ-FE performs admirably in most regards, its high oil consumption is a major drawback.

The good news is that it doesn’t significantly reduce durability or dependability over time.

However, you may find yourself paying more than necessary for oil since you need to keep the tank full.

Aside from that, most 2AZ FE engines on the road today are quite old and have clocked quite a few miles, so it’s possible that they may spring an oil leak at some point.

Even though a wide variety of issues exist, nothing seems particularly frequent. To a large extent, the 2AZ-dependability FEs are dependent on routine maintenance and random chance.

Toyota 2AZ-FE 2.4L Engine Review

Although the 2AZ-FE engine is largely dependable, it is not perfect. Excessive oil consumption is a prevalent problem that can arise as early as 40,000–50,000 kilometers. It is believed that this is the result of a poorly designed piston ring. For a full review, please check this YouTube video Here.

Toyota 2AZ-FE 2.4L Engine FAQ 

Is Toyota 2AZ-FE a good engine?

Toyota’s 2AZ-FE engine, which has been in production since 2000, can be found in a wide variety of Toyotas and Scion vehicles made between 2001 and 2015.

The 2.4-litre inline-four engine may not excel in acceleration, but it provides adequate power for most drivers. Additionally, it is quite cost-effective while still maintaining a high standard of efficiency.

How much HP can a 2AZ-FE handle?

At launch, the 2AZ-FE engine developed 160 horsepower at 5,600 rpm and 162 lb-ft of torque at 4,000 rpm, with a compression ratio of 9.6:1.

Depending on the model and year, the latter variants produce 149–170 horsepower and 138–165 lb-ft of torque.

Is 2.4 litre a good engine?

Is it a smart idea to get a 2.4-litre engine? The 2.4 is generally accepted as a trouble-free and dependable motor due to its well-designed head gaskets and adequate oil sealing.

Does 2.4 L engine consume more fuel?

There will be a modest increase in fuel costs.

Because the only major mechanical differences are the rear differential and prop shaft, the 2.4L engine servicing items should be priced similarly to the 2.0L motor. 

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