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Toyota 2JZ-GE Specifications
| Engine Model: Toyota 2JZ-GE |
| Engine Type: 4-cycle inline 6-cylinder DOHC 24-valve VVT-i liquid-cooled gasoline |
| Total Displacement: 182.9 cu.in (2.99 L) |
| Rated Engine Power: 217-231 Hp (162-172 kW) at 5800 rpm |
| Fuel System Type: Sequential multi-port electronic fuel injection |
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| General Technical Data |
The Toyota 2JZ-GE is a 3.0-liter inline-six, four-stroke, water-cooled gasoline engine developed as part of Toyota’s JZ-family, renowned for its exceptional reliability, smooth operation, and performance potential. Introduced in 1991, the 2JZ-GE served as the naturally aspirated counterpart to the 2JZ-GTE twin-turbocharged variant. It replaced the earlier 7M-GE and continued Toyota’s tradition of robust straight-six powerplants with refined engineering. The engine was installed in premium rear-wheel-drive sedans and sports coupes such as the Toyota Supra, Aristo, Soarer, and Lexus GS300.
Its architecture emphasizes strength and
longevity, making it one of Toyota’s most iconic inline-sixes. The
cast-iron block, aluminum DOHC cylinder head, and advanced electronic
controls established the 2JZ-GE as a benchmark in the 1990s for
mechanical refinement and tuning resilience. Early versions used a
conventional non-variable valve timing system, while later iterations
adopted Toyota’s VVT-i (Variable Valve Timing – intelligent) technology
for improved torque and efficiency.
The Toyota 2JZ-GE has a total displacement of 2997 cc (182.9 cubic
inches), achieved through a bore of 86.0 mm (3.39 inches) and a stroke
of 86.0 mm (3.39 inches), resulting in a square bore/stroke ratio. The
engine’s design prioritizes smoothness, with the firing order of
1–5–3–6–2–4 and a crankshaft supported by seven main bearings.
The cylinder block is cast from high-strength
iron, featuring deep skirts and cross-bolted main bearing caps for
exceptional rigidity, a design contributing to the engine’s ability to
withstand high stress in performance applications. The aluminum alloy
cylinder head houses dual overhead camshafts operating four valves per
cylinder, totaling twenty-four valves. The valve angle is 45 degrees,
and the combustion chamber adopts a pent-roof design to enhance mixture
turbulence and combustion efficiency.
Compression ratio varies by version: early non-VVT-i models feature a
ratio of 10.0:1, while VVT-i versions introduced in 1997 use 10.5:1.
Power output ranges from 162 to 169 kW (217 to 227 Hp, 214 to 224 bhp)
at 5800 rpm for early units, and approximately 169 to 172 kW (227 to 231
PS, 224 to 228 bhp) at 5800 rpm for VVT-i variants. Maximum torque is
rated between 285 and 305 Nm (210 to 225 lb-ft) at 4800 rpm. The redline
is set near 6800 rpm, and fuel cutoff occurs at around 7000 rpm. Idle
speed is 650 ± 50 rpm for early models and electronically stabilized at
700 ± 50 rpm for VVT-i versions.
The pistons are aluminum alloy with a molybdenum coating for reduced
friction and wear. The connecting rods are forged steel with
full-floating wrist pins, and the crankshaft is forged steel with eight
counterweights for balance. The camshafts are chain-driven through a
single-roller chain with a hydraulic tensioner, ensuring long service
life and precise timing. Valve actuation is via shim-over-bucket tappets
in non-VVT-i engines and hydraulic lash adjusters in VVT-i models,
eliminating the need for periodic clearance adjustment.
| Fuel System |
The 2JZ-GE uses Toyota’s sequential multi-port electronic fuel injection (EFI) system, providing precise control of fuel delivery across the full load and speed range. Fuel is supplied from an electric in-tank pump through a high-pressure line to a stainless-steel fuel rail feeding six solenoid injectors located near the intake ports. The injectors are top-feed, high-impedance units typically rated at 315 cc/min.
Fuel pressure is maintained at approximately 300 kPa (43 psi) by a
vacuum-referenced pressure regulator, with excess fuel returned to the
tank. The ECU monitors air intake volume, throttle position, engine
speed, coolant temperature, and oxygen content to determine injector
pulse width. Early systems used a Karman-vortex air-flow meter, later
replaced by a hot-wire MAF sensor in VVT-i engines for improved response
and emissions control. Recommended fuel is unleaded gasoline with a
minimum octane rating of 95 RON (91 AKI).
The fuel filter is located along the chassis rail or integrated in the
fuel delivery line and should be replaced every 40,000 km (25,000
miles). The injectors should be cleaned or inspected every 80,000 km
(50,000 miles). Fuel pump relay and circuit opening relays are
ECU-controlled for safety and efficiency.
| Lubrication System |
The lubrication system is a fully pressurized wet-sump type using a trochoid oil pump driven by the crankshaft. Pressurized oil is distributed through galleries to lubricate main bearings, connecting rod journals, camshaft journals, and valve mechanisms. Piston oil jets spray the undersides of the pistons to control temperature and prevent detonation. Oil pressure is approximately 400–500 kPa (58–72 psi) at 3000 rpm and around 100 kPa (15 psi) at idle.
The total oil capacity with filter is 4.9 liters (5.2 US quarts). Toyota
recommends API SJ or higher-rated oil, typically SAE 5W-30 or 10W-30,
depending on ambient temperature. The oil filter is a spin-on type
mounted vertically for easy replacement. Oil change interval is every
10,000 km (6,000 miles) or six months under normal driving, and every
5,000 km (3,000 miles) for severe use.
A PCV (Positive Crankcase Ventilation) system is integrated to manage
blow-by gases and maintain clean crankcase conditions. The oil pressure
switch provides input to the warning light circuit, while VVT-i versions
also incorporate an oil control valve (OCV) and filter screen for the
VVT mechanism. Clean oil is crucial for the proper operation of the
variable valve timing system.
| Cooling System |
The engine employs a liquid-cooled system with a belt-driven centrifugal water pump, aluminum cross-flow radiator, thermostat, and pressurized expansion tank. The thermostat begins to open at 82°C (180°F) and is fully open by 95°C (203°F). The radiator cap pressure rating is approximately 108 kPa (15.6 psi). Depending on application, the cooling fan is either a viscous clutch-driven mechanical unit or an electric fan controlled by the ECU.
Coolant flow is optimized through bypass passages and a rear-mounted coolant outlet for uniform cylinder temperature. The total system capacity is approximately 8.5 liters (9.0 US quarts). The coolant mixture should be 50/50 ethylene glycol and distilled water, protecting against freezing down to –35°C (–31°F). Coolant replacement interval is every 40,000 km (25,000 miles) or every two years.
| Intake and Exhaust Systems |
The intake manifold is made of cast aluminum with long, equal-length
runners tuned for mid-range torque. The throttle body is cable-actuated
on early engines and electronically controlled (ETCS-i) in VVT-i
versions. A resonance chamber helps smooth intake pulses and reduce
noise. The air filter is a dry paper type, located in a sealed airbox;
replacement is recommended every 20,000 km (12,000 miles).
The exhaust manifold is cast stainless steel on most versions, feeding
into a dual-pipe exhaust system with a catalytic converter located close
to the manifold to ensure rapid warm-up and emissions compliance. The
exhaust system includes pre- and post-catalyst oxygen sensors monitored
by the ECU for closed-loop fuel control. Exhaust gas recirculation (EGR)
is employed on some models to reduce NOx emissions.
| Ignition and Electrical System |
The 2JZ-GE initially used a distributor-type ignition system with a single coil and an external igniter. In later VVT-i models, the engine adopted a coil-on-plug direct ignition system controlled entirely by the ECU, eliminating high-tension leads.
Spark plugs are platinum or iridium-tipped, gapped to 1.1 mm (0.043 inch), and should be replaced every 40,000 km (25,000 miles). The alternator output ranges between 90 and 100 amperes, and the starter motor is a 1.4-kilowatt reduction gear type. The battery system operates at 12 volts DC.
| Valve Timing System (VVT-i) |
Introduced in 1997, Toyota’s VVT-i system on the 2JZ-GE continuously adjusts the intake camshaft timing to optimize valve overlap across varying engine speeds and loads. The VVT-i actuator is hydraulically operated and electronically controlled through an oil control valve that responds to ECU signals. The system improves low-end torque, fuel efficiency, and emissions while maintaining strong high-end performance. The VVT-i system typically advances cam timing by up to 30 degrees of crankshaft rotation.
| Dimensions and Weight |
The overall dimensions of the 2JZ-GE engine are approximately 880 mm (34.6 inches) in length, 630 mm (24.8 inches) in width, and 725 mm (28.5 inches) in height. The dry weight is approximately 215 kg (474 lbs) for the early version and around 225 kg (496 lbs) for the VVT-i-equipped variant. The engine mounts use three or four-point rubber-isolated brackets designed to minimize vibration transfer to the chassis. Its robust construction contributes to overall durability but adds weight compared to aluminum-block competitors.
| Maintenance Data |
Routine maintenance ensures the 2JZ-GE’s exceptional reliability. Oil and filter changes are required every 10,000 km (6,000 miles). Coolant should be replaced every 40,000 km (25,000 miles). The timing belt, idler, and tensioner should be replaced every 100,000 km (60,000 miles).
Spark plugs are replaced every 40,000 km (25,000 miles), and the air filter every 20,000 km (12,000 miles). The fuel filter should be renewed every 40,000 km (25,000 miles). The PCV valve is cleaned or replaced every 30,000 km (18,000 miles).
Compression pressure for each cylinder in a healthy engine is approximately 1,275 kPa (185 psi) at 300 rpm, with a minimum acceptable limit of 980 kPa (142 psi). Maximum variation between cylinders should not exceed 100 kPa (15 psi). Standard idle speed is 650 ± 50 rpm (non-VVT-i) or 700 ± 50 rpm (VVT-i).
| Tightening Torques |
Cylinder head bolts: 39 Nm (29 lb-ft), then tighten degrees, and again
another 90 degrees.
Main bearing cap bolts: 78 Nm (58 lb-ft) plus 90 degrees.
Connecting rod bolts: 43 Nm (32 lb-ft) plus 90 degrees.
Camshaft bearing cap bolts: 14 Nm (10 lb-ft).
Flywheel bolts: 83 Nm (61 lb-ft) plus 90 degrees.
Crankshaft pulley bolt: 320 Nm (236 lb-ft).
Oil pump cover bolts: 9 Nm (7 lb-ft).
Intake manifold bolts: 25 Nm (18 lb-ft).
Exhaust manifold nuts: 35 Nm (26 lb-ft).
Spark plugs: 18 Nm (13 lb-ft).
Drain plug: 40 Nm (30 lb-ft).
Engine mount bolts: 60 Nm (44 lb-ft).
| Vehicle Applications |
The Toyota 2JZ-GE engine was used in numerous rear-wheel-drive Toyota
and Lexus vehicles between 1991 and 2005.
Key applications include:
– Toyota Supra (JZA80, 1993–2002) – naturally aspirated models.
– Toyota Aristo (JZS147, JZS160; 1991–2005).
– Toyota Soarer / Lexus SC300 (JZZ30, 1991–2000).
– Lexus GS300 (S140 and S160 series, 1993–2005).
– Toyota Crown (JZS155, JZS171).
– Toyota Altezza AS300 (JCE10, 1998–2005).
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