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Toyota 1UR-FE Specifications
| Engine Model: Toyota 1UR-FE |
| Engine Type: 4-cycle 8-cylinder 32-valve DOHC Dual VVT-i liquid-cooled gasoline |
| Total Displacement: 281.3 cu.in (4.61 L) |
| Rated Engine Power: 308-314 Hp (230-234 kW) at 6000 rpm |
| Fuel System Type: Sequential multi-point electronic fuel injection |
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- Toyota 1SZ-FE Engine Specifications
- Toyota 1TR-FE Engine Specifications
- Toyota 1UZ-FE Engine Specifications
| General Technical Data |
The Toyota 1UR-FE is a 4.6-liter V8 gasoline engine belonging to Toyota’s modern UR family of all-aluminum powerplants. Introduced in 2006 to replace the UZ series, the 1UR-FE represents a new generation of light, efficient, and powerful eight-cylinder engines designed for luxury sedans, SUVs, and trucks.
It combines advanced lightweight construction,
intelligent electronic management, and smooth operation typical of
Toyota’s premium power units. Initially fitted with dual overhead
camshafts and Dual VVT-i (Variable Valve Timing – intelligent) on both
intake and exhaust camshafts, it delivers improved performance, fuel
efficiency, and lower emissions compared to the earlier 2UZ-FE and
3UZ-FE engines.
The engine was developed for both rear-wheel-drive and four-wheel-drive
applications and is widely used in the Toyota Land Cruiser, Lexus GX460,
and various other models. Unlike the 1UR-FSE, which employs direct
injection, the 1UR-FE utilizes sequential multi-port electronic fuel
injection for durability and ease of maintenance, particularly suited to
markets with lower fuel quality. Its balance of power, refinement, and
longevity has earned it a reputation as one of Toyota’s most reliable
modern V8s. The engine embodies Toyota’s philosophy of precision
engineering, offering robust torque throughout the rev range and refined
performance suitable for luxury and utility alike.
The 1UR-FE is a 4.6-liter (4608 cc) naturally aspirated V8 gasoline
engine operating on the four-stroke Otto cycle. It features a 90-degree
bank angle, aluminum alloy block, and cylinder heads for weight
reduction. The bore and stroke measure 94.0 mm (3.70 inches) and 83.0 mm
(3.27 inches) respectively. The resulting displacement is 4608 cc (281.3
cubic inches). The compression ratio is 10.2:1 for early versions and
10.8:1 for later Dual VVT-i variants, optimizing thermal efficiency
while maintaining compatibility with premium unleaded fuel (95 RON or
higher).
The firing order is 1-8-7-3-6-5-4-2, and the crankshaft is a forged
steel, five-bearing type with cross-plane configuration for maximum
smoothness and reduced vibration. Each cylinder head features twin
camshafts operating four valves per cylinder, totaling thirty-two
valves. The valvetrain employs roller rocker arms and hydraulic lash
adjusters to minimize friction and eliminate the need for periodic valve
clearance adjustment. The camshafts are chain-driven by a primary and
secondary roller chain system with hydraulic tensioners, ensuring
lifetime durability without scheduled replacement.
Power output for the 1UR-FE ranges between 230 and 234 kW (308–314
horsepower, 312–318 bhp) at approximately 5,500 to 6,000 rpm. Maximum
torque is rated at 460 to 470 Nm (339–347 lb-ft) at 3,400 rpm. The Dual
VVT-i version achieves improved torque spread and fuel efficiency
through continuous variable adjustment of both intake and exhaust valve
timing. Redline occurs near 6,400 rpm, and idle speed is controlled
electronically at around 650 rpm. The engine is designed for
longitudinal mounting and incorporates a rear-mounted automatic
transmission in most applications.
| Fuel System |
The Toyota 1UR-FE employs an electronically controlled sequential
multi-point fuel injection system. Fuel is supplied from an in-tank
electric pump to a common delivery rail under regulated pressure of
approximately 350 kPa (51 psi). Each cylinder has an individual injector
positioned in the intake port, delivering atomized fuel precisely
metered by the engine control unit (ECU). The ECU manages injector pulse
width and timing based on signals from the throttle position,
crankshaft, oxygen, coolant temperature, and air mass sensors.
The throttle system is fully electronic (ETCS-i), with a motor-driven
throttle valve that responds to accelerator pedal input while
integrating cruise control, traction control, and idle management. The
fuel pressure regulator and dampers maintain constant pressure relative
to manifold vacuum. Recommended fuel is unleaded premium gasoline of 95
RON (91 AKI) or higher.
The fuel filter is integrated with the pump module and typically maintenance-free for the service life of the vehicle. Injectors are self-cleaning type with fine multi-hole nozzles for precise atomization and are designed for extended service intervals beyond 100,000 km (62,000 miles).
| Lubrication System |
A full-pressure, wet-sump lubrication system ensures all moving
components receive an adequate oil supply under all operating
conditions. A trochoid-type oil pump, driven by the crankshaft, draws
oil from the aluminum sump through a strainer and supplies it to the
main oil gallery, crankshaft bearings, connecting rods, camshafts,
timing chain, and valve train. The oil filter is a replaceable cartridge
element located at the front of the block for easy service access. Oil
jets are provided for piston cooling to prevent detonation and thermal
stress during sustained high-load operation.
Normal oil pressure is around 400 to 600 kPa (58–87 psi) at 3,000 rpm.
Total oil capacity with filter change is approximately 7.5 liters (7.9
US quarts, 6.6 Imperial quarts). Recommended oil viscosity is SAE 5W-30
or 0W-20 meeting API SN or ILSAC GF-5 standards. Under normal driving,
the oil and filter should be replaced every 10,000 km (6,000 miles) or
annually, with shorter intervals recommended for severe conditions or
heavy towing. The crankcase ventilation system incorporates a PCV valve
to reduce emissions and maintain internal cleanliness.
| Cooling System |
The 1UR-FE uses a sealed, pressurized liquid cooling system designed for uniform heat dissipation and rapid warm-up. Coolant is circulated by a belt-driven centrifugal water pump through the block, cylinder heads, radiator, and heater core. The thermostat begins to open at 82°C (180°F) and is fully open at 95°C (203°F). Cooling capacity is approximately 11.0 liters (11.6 US quarts, 9.7 Imperial quarts).
A cross-flow aluminum radiator, electric fan assembly, and expansion reservoir maintain consistent temperature regulation. Later models employ an electronically controlled thermostat and fan operation coordinated by the ECU based on load and temperature sensors. The coolant mixture is typically 50/50 ethylene glycol and demineralized water, providing freezing protection to –35°C (–31°F). Replacement interval for Toyota Super Long Life Coolant is 160,000 km (100,000 miles) or five years.
| Intake and Exhaust Systems |
The induction system features a composite resin intake manifold optimized for airflow balance and reduced weight. The design incorporates long intake runners for torque enhancement at mid-range speeds. An electronic throttle body ensures precise air metering, and a mass air flow (MAF) sensor continuously reports airflow data to the ECU. The air filter is a dry-paper type, serviceable every 30,000 km (18,600 miles).
The exhaust manifolds are stainless steel with close-coupled catalytic converters to meet stringent emission standards. Oxygen sensors are placed upstream and downstream of the catalysts for precise air-fuel ratio management. An EGR system (Exhaust Gas Recirculation) further reduces nitrogen oxide emissions by introducing a controlled portion of exhaust gases back into the intake.
| Ignition and Electrical System |
The 1UR-FE uses a fully electronic, direct ignition system with eight individual coil-on-plug modules. The ECU regulates ignition timing in response to engine load, speed, knock sensor input, and temperature. Spark plugs are iridium-tipped, gapped at approximately 1.1 mm (0.043 inches), and require replacement at 160,000 km (100,000 miles).
The alternator is rated at 130 to 150 amperes, providing stable electrical supply for multiple onboard systems. The starter motor is reduction gear type with integrated solenoid, operating on a 12-volt electrical system. Grounding is reinforced through multiple chassis points to ensure signal integrity for sensitive control modules.
| Valve Timing and Drive Mechanism |
A dual roller chain system drives the four camshafts, featuring a hydraulic tensioner and dampers for quiet and maintenance-free operation. Dual VVT-i technology continuously varies valve timing on both the intake and exhaust sides using oil-pressure-actuated cam phasers. This allows optimal valve overlap across the rpm range, improving torque, efficiency, and emissions.
The phasing range is approximately 40 degrees crank angle on intake and 35 degrees on exhaust. The timing chain is designed for the life of the engine with no replacement interval, though inspection at high mileage is recommended. Timing chain noise or tensioner wear is rare due to the robust design and high-quality materials.
| Dimensions and Weight |
The 1UR-FE engine measures approximately 740 mm (29.1 inches) in length, 720 mm (28.3 inches) in width, and 720 mm (28.3 inches) in height. The dry weight is approximately 190 kg (419 lbs), slightly lighter than the preceding 2UZ-FE despite increased displacement and technology. The aluminum construction and compact head design contribute to improved vehicle balance and packaging flexibility. Engine mounts are hydraulically damped to minimize vibration and resonance transmission to the cabin.
| Maintenance Data |
Routine maintenance ensures longevity and consistent performance. Engine oil and filter should be replaced every 10,000 km (6,000 miles). The air filter element is replaced every 30,000 km (18,600 miles). Spark plugs should be inspected at 80,000 km (50,000 miles) and replaced at 160,000 km (100,000 miles).
Coolant renewal is required every 160,000 km or 5 years. Drive belts
should be inspected at 40,000 km (25,000 miles) and replaced as
necessary. Fuel system and throttle body should be cleaned periodically
to maintain smooth idle and throttle response. Valve train and timing
components are maintenance-free under normal conditions.
Compression pressure should read approximately 1,300 kPa (190 psi) at
300 rpm, with a minimum of 1,000 kPa (145 psi). Variation between
cylinders must not exceed 100 kPa (15 psi). Normal idle speed is 650 ±
50 rpm. Oil pressure should be at least 100 kPa (15 psi) at idle.
| Tightening Torques |
Cylinder head bolts: 40 Nm (30 lb-ft) plus 90 degrees, then an
additional 90 degrees.
Main bearing cap bolts: 70 Nm (52 lb-ft) plus 90 degrees.
Connecting rod bolts: 40 Nm (30 lb-ft) plus 90 degrees.
Camshaft bearing cap bolts: 10 Nm (7 lb-ft).
Crankshaft pulley bolt: 250 Nm (184 lb-ft).
Flywheel bolts: 85 Nm (63 lb-ft) plus 90 degrees.
Spark plugs: 25 Nm (18 lb-ft).
Oil drain plug: 40 Nm (30 lb-ft).
Intake manifold bolts: 25 Nm (18 lb-ft).
Exhaust manifold nuts: 35 Nm (26 lb-ft).
Valve cover bolts: 9 Nm (7 lb-ft).
Engine mount bolts: 60 Nm (44 lb-ft).
| Vehicle Applications |
The Toyota 1UR-FE engine has been fitted to a wide range of vehicles
emphasizing durability and refinement.
Primary applications include:
– Toyota Land Cruiser 200 (URJ200, selected markets)
– Toyota Tundra (UPK50, 2006–2021)
– Toyota Sequoia (2008–2021)
– Toyota Crown Majesta (UZS207, Japan)
– Lexus GX460 (URJ150, 2009–present)
– Lexus LS460 (USF40/41, markets where 1UR-FSE was not offered).
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