Toyota 1UR-FE 4.6L Engine Specs, Problems & Reliability

Toyota 1UR-FE 4.6L Engine

Here in this article, you will learn about the Toyota 1UR-FE 4.6L Engine Specs, Performance, Cylinder Heads, Cam Specs & More, Let’s discuss the Toyota 1UR-FE 4.6L Engine, Problems, Reliability, and Reviews.

The 1UR-FE is a gasoline engine that has been made by Toyota since 2006. It has a displacement of 4.60 litres (4,608 cc or 281.2 cu in), eight cylinders, a four-stroke cycle, and an internal combustion design with natural aspiration.

The 8 cylinders of the 1UR-FE engine are arranged in a V pattern with a bank angle of 90 degrees.

The 1UR-FE has a crankshaft supported by five bearings, an aluminium cylinder block with dual overhead cams (DOHC) and four valves per cylinder, and two aluminium cylinder heads (32 in total).

The Toyota 1UR-FE engine features a number of advanced technologies, including an L-type sequential fuel injection (SFI) system, a direct ignition system (DIS) with individual coils on each spark plug, an acoustic control induction system (ACIS), an electronic spark advance (ESA), and an electronic throttle and cam timing system (ETCS-i) (electronic throttle control system-intelligent). Additionally, intake and exhaust camshafts in the engine utilized a Dual VVT-i (variable valve timing) system.

This engine’s emissions were lowered with the use of a water-cooled exhaust gas recirculation (EGR) system and an air injection system that allowed the catalytic converters to heat up more quickly.

Toyota 4.6 V8 1UR-FE Engine

Engine Specifications

Engine code1UR-FE
LayoutFour-stroke, V8
Fuel typeGasoline (petrol)
Displacement4.6 L, 4,608 cm2 (281.2 cu in)
Fuel systemSequential multi-point fuel injection (SFI)
Power adderNone
Power outputFrom 296 PS (218 kW; 292 HP) at 5,500 rpm
to 347 PS (255 kW; 342 HP) at 6,400 rpm
Torque outputFrom 439 Nm (44.8 kg·m; 324 ft·lb) at 3,500 rpm
to 460 Nm (46.9 kg·m; 339.5 ft·lb) at 4,100 rpm
Firing order1-8-7-3-6-5-4-2
Dimensions (L x W x H):
Weight216 kg (476 lb)

Cylinder head

Blockhead alloyAluminium
Valve Arrangement:DOHC, chain drive
Cylinder head height:
Valves:32 (4 valves per cylinder)
Intake valve timing:232°
Exhaust valve timing:234°
Valve head diameter:INTAKE38.0 mm (1.496 in)
EXHAUST34.5 mm (1.260 in)
Valve length:INTAKE105.85 mm (4.17 in)
EXHAUST110.40 mm (4.35 in)
Valve stem diameter:INTAKE5.470-5.485 mm (0.215-0.216 in)
EXHAUST5.465-5.480 mm (0.2152-0.2157 in)
Valve spring free length:INTAKE51.59 mm (2.03 in)
EXHAUST51.59 mm (2.03 in)

Cylinder block

Cylinder block alloyDie-cast aluminium
Compression ratio:10.2:1
Cylinder bore:94.0 mm (3.7 in)
Piston stroke:83.0 mm (3.27 in)
A number of piston rings (compression/oil):2 / 1
A number of main bearings:5
Cylinder inner diameter (standard):94.000-94.012 mm (3.700-3.701 in)
Piston skirt diameter (standard):93.980-93.990 mm (3.7000-3.7004 in)
Piston pin outer diameter:21.998-22.007 mm (0.8660-0.8664 in)
Connecting rod bushing inner diameter:22.005-22.014 mm (0.8663-0.8667 in)
Connecting rod big end diameter:50.000-55.006 mm (1.9685-2.1656 in)
Piston ring side clearance:Top0.020-0.070 mm (0.0008-0.027 in)
Second0.020-0.060 mm (0.0008-0.0024 in)
Oil0.010-0.040 mm (0.0039-to 0.0157 in.)
Piston ring end gap:Top0.23-0.33 mm (0.0090-0.0130 in)
Second0.40 to 0.50 mm (0.0157-0.0197 in)
Oil0.10 to 0.40 mm (0.0040-0.0157 in)
Crankshaft main journal diameter:66.988-67.000 mm (2.6373-2.6378 in)
Crankpin diameter:52.982-53.000 mm (2.0859-2.0866 in.)

Compression pressure

Standard13.3 kg/cm2, (189 psi) / 300 rpm
Minimum10.2 kg/cm2, (145 psi) / 300 rpm
Compression differential limit between cylinders1.0 kg/cm2, (15 psi) / 300 rpm

Oil system

Oil consumption, L/1000 kmup to 1.0
Recommended engine oil5W-30
Oil type APISL or SJ
Engine oil capacity (Refill capacity)With filter change 6.4-6.8 litres
Without filter change 5.7-6.4 litres, depending on the year and vehicle model.
Oil change interval, km (miles)8,000 (5,000)
Oil PressureIdle speed: 70 kPa (0.7 kg/cm 2, 10.1 psi) or more
2,500 rpm: 220 kPa (2.2 kgf/cm 2, 32 psi) or more

Ignition system

Spark plugDENSO: SK20R11.
Spark plug gap1.0-1.1 mm (0.0394-0.0433 in.)
Spark plug tightening torque21 Nm (2.14 kg⋅m, 15 ft-lb)

Vehicle Applications 

ModelYears Produced
Lexus LS 460 & LS 460 L2006–2017
Lexus GS 4602005–2011
Lexus GX 4602009–
Toyota Land Cruiser2012
Toyota Sequoia2009–2012
Toyota Tundra2009–

Toyota 4.6 V8 1UR-FE Engine Problems and Reliability

It’s strange that they’re having compatibility issues together given that the new engine is completely different from the 2UZ-FE in every way.

There are still leaks and problems with the water pump. It can only be used for around 60,000 miles (100,000 km) until it completely breaks down.

When this happens, the timing chain is no longer tightly wound because the hydraulic chain tensioner has failed.

During the first few years of manufacturing, the engine used less-than-reliable valve springs.

One common gripe amongst owners is that their vehicles require up to 0.5 litres of oil for every 1,000 kilometres driven.

When compared to the 2UZ-FE, the 1UR-FE engine is nearly identical in longevity and durability.

powered by the 1UR-FSE engine. The 1UR-FSE engine improves upon the original 1UR design with newer and better technology.

One injector at the intake port and another in the combustion chamber for each cylinder characterize the D-4S (Direct-injection 4-stroke Superior) injection system found in this variant.

Toyota 4.6 V8 1UR-FE Engine Review 

The Toyota 4.6V8 1UR-FE is a naturally aspirated V8 engine introduced in 2007. The engine is based off the 1UR FSE, but does not have the D-4S technology. The 1UR-FE was used on a number of Toyota and Lexus models, including the Tundra and Sequoia. For a full review, please check this YouTube video Here.

Toyota 4.6 V8 1UR-FE Engine FAQ 

Is the 4.6 V8 a good engine for Toyota?

The 4.6 is a strong engine, but if the mpg difference is negligible, why not go for the highest possible output?

Which Toyota V8 engine is best?

One of the best V8s for a full-size pickup or SUV is the Toyota 5.7-liter unit. For the past 14 years, Toyota has relied on it, and with good reason:

It is incredibly dependable and boasts impressive performance statistics. The single major negative of this engine is its poor fuel economy.

How long does a 4.6 V8 engine last?

They either seize up right after being taken off the delivery truck (when brand new) or they make it to 200,000 miles before breaking down.

Our 4.6L engines routinely exceed 150,000 miles of severe service thanks to regular maintenance. The vehicle itself will fail long before the engine does. Thirty-six individuals said it was useful.

What year 4.6 had the spark plug problems?

This article details a spark plug problem that plagued Ford’s 4.6-litre, 5.4-litre, and 6.8-liter 3-valve “modular” engines from 2004 to 2008.

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