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The Toyota 2JZ engine is a 3.0-liter inline-six, four-stroke engine. Its actual displacement is 2,998 cc. The 2JZ engines have a cast-iron cylinder block that can withstand heavy loads and a steel crankshaft. The piston stroke is 83 mm, and the piston diameter is 86 mm. The 2JZ engines use aluminum cylinder heads with DOHC (Dual Overhead Camshafts) and 24 valves (4 valves per cylinder). The 2JZ engine also has a chain-driven camshaft, a chain tensioner, and a balancer shaft. It uses a belt-driven timing pulley. The 2JZ engine has a compression ratio of 8.5:1 (non-VVT-i) or 10:1 (VVT-i). The 2JZ engines have various cylinder head configurations and turbocharging options to enhance performance and efficiency. There are three main types of 2JZ engines:
Other variants of the 2JZ engines include 2JZ-GE, 2JZ-GTE, and 2JZ-GE (VVT-i). They have slight variations in performance and specifications.
The following are some of the general specifications of the 2JZ engines:
Engine code:
Each engine has a code that is used to identify it. The 2JZ engine has the 2JZ engine code.
Engine configuration:
The engine is configured in-line with six cylinders.
Engine displacement:
The engine displacement is 3.0 liters, which is equivalent to 2997 cc.
Firing order:
The cylinders in the engine fire in the following order: 1-5-3-6-2-4.
Compression ratio:
The compression ratio for the 2JZ-GE engines is 10.5:1, while the 2JZ-GTE engines have a compression ratio of 8.5:1.
Power output:
The power output varies depending on the engine variant. The 2JZ-GE engines produce between 160-220 hp, and the 2JZ-GTE engines produce 276-500 hp.
Torque output:
Just like the power output, the torque output varies depending on the engine variant. The 2JZ-GE engines produce 420 Nm of torque, while the 2JZ-GTE engines produce 460-620 Nm of torque.
Fuel system:
The engines have a multi-port fuel injection system that ensures an efficient fuel-air mixture for combustion.
Ignition system:
The 2JZ engines have a coil-on-plug ignition system that ensures a reliable spark and improved engine performance.
Valvetrain:
Each 2JZ engine has two camshafts (DOHC) and four valves per cylinder, which enhances airflow and improves engine efficiency.
Below are some maintenance requirements for the 2JZ engines:
Before purchasing a 2JZ engine, buyers should consider several important factors. These include understanding the basics of 2JZ engines, recognizing key factors when buying a 2JZ engine, and identifying 2JZ engine variations.
To put it simply, the 2JZ engine is a series of inline 6-cylinder gasoline engines. It was developed by Toyota as a replacement for the M-series engines. The 2JZ engine family has a large number of fans because of its reliability and durability. The 2JZ engine is mainly used in sports cars. The most common and famous 2JZ engine is the one used in the Toyota Supra Mark IV.
There are several variants of the 2JZ engine. The most common is the 2JZ-GE, which is used in most Toyota cars. The 2JZ-GTE, on the other hand, is the more powerful version of the engine and is mainly used in sports cars like the Toyota Supra.
When purchasing a 2JZ engine, buyers need to consider the following factors:
Understanding the different types of 2JZ engines can help buyers make better purchases. Here are the different types of 2JZ engines:
Replacing a 2JZ engine is a complex task that requires mechanical knowledge and experience. Here are the general steps:
Gather the tools
One should collect the necessary tools for the replacement project. They include jacks and jack stands, engine hoist, socket and ratchet set, wrenches, torque wrench, screwdrivers, pliers, and a shop manual for specific guidance.
Disconnect the battery
Before any work is done on the electrical system or the engine, it is crucial to disconnect the battery. This will prevent electrical shorts and other issues.
Drain fluids
One should drain all the fluids related to the engine. They include coolant, oil, and fuel. Ensure that the fluids are disposed of following the regulations set by the local authority.
Remove the accessories
Accessories that are mounted on the engine like air conditioning, power steering, and alternator should be removed. Also, the exhaust system, intake system, and wiring harness should be disconnected.
Support the 2JZ engine and transmission
one should use a jack to support the 2JZ engine and the transmission. This will provide stability and support during the removal process.
Prepare for removal
One should attach the engine hoist to the 2JZ engine. Follow the manual of the car to find the correct lifting points. The engine hoist should be attached securely to avoid accidents during removal.
Remove the 2JZ engine
One should loosen and remove all the bolts that hold the 2JZ engine in place. After that, carefully lift the engine out of the car using the engine hoist. Be careful and ensure that all the attached components are cleared to prevent accidents.
Install the new 2JZ engine
Place the new 2JZ engine onto the engine mounts. Then, connect all the previously disconnected components. They include the exhaust system, wiring harness, intake system, alternator, power steering, and air conditioning.
Fill fluids
one should refill the engine oil and cooling into the new engine. Follow the specifications provided in the user manual and use the recommended fluids.
Reconnect the battery
One should reconnect the battery after completing the replacement of the 2JZ engine. Ensure that the connections are clean and tight.
Start the engine
Before starting the engine, ensure that all the systems are checked. Look for leaks in the oil, fuel, and cooling systems. Once sure that everything is in place, start the engine and let it run for a few minutes. Then, recheck all the systems again.
Q1: What is the 2JZ engine?
A1: The 2JZ engine is a 3.0L inline-six-cylinder internal combustion engine. It was made by the Toyota Motor Corporation. The 2JZ engines are found in many Toyota vehicles. For example, the 2JZ engines are used in the Toyota Mark II, Toyota Chaser, and Toyota Crown.
Q2: Why is the 2JZ engine so popular?
A2: The 2JZ engine is popular because of its high power output and tuning potential. For example, the 2JZ-GTE variant (found in the Toyota Supra MK4) has 276 hp and can produce over 1000 hp with proper modifications. The 2JZ engine is also known for its reliability.
Q3: How much does a 2JZ engine cost?
A3: The 2JZ engine price varies depending on the condition and which variant it is. However, the 2JZ engine is not cheap.