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Toyota 2UZ-FE Engine Specifications
The Toyota 2UZ-FE is a 4.7 l (4,663 cc, 284.55 cubic inches) V8,
four-stroke cycle water-cooled naturally aspirated internal combustion
gasoline engine, manufactured by the Toyota Motor Corporation since 1998
to 2011.
The 2UZ-FE engine has 8 cylinders in a V-arrangement at a bank angle of
90 deg. The 2UZ-FE features cast-iron block to increase durability with a
five-bearings crankshaft and two aluminum heads with two camshafts
(DOHC) and four valves per cylinder (32 in total). The Toyota 2UZ-FE
engine is equipped with SFI (Sequential Multiport Fuel Injection)
system, Direct Ignition System (DIS) ignition system with individual
coils on each spark plug, Electronic Spark Advance (ESA) and ETCS-i
(Electronic Throttle Control System-intelligent). The latest engine
versions (after 2007) were equipped with a VVTi (Variable Valve Timing)
system for the intake camshafts.
A 94.0 mm (3.7 in) cylinder bore and 84.0 mm (3.31 in) piston stroke
give the 2UZ-FE engine a total of 4,663 cc (284.55 cubic inches) of
displacement. Compression ratio rating is 9.6:1 (before 2007) or 10.0:1
(after 2007).
The engine produced from 230 PS (169 kW; 227 HP) at 4,800
rpm to 288 PS (212 kW; 284 HP) at 5,400 rpm of maximum power and from
343 Nm (35 kgm, 253 ft-lb) at 3,400 rpm to 450 Nm (45.9 kgm, 332 ft-lb)
at 3,400 rpm of peak torque depending on year and vehicle model.
Engine code identification:
2 - 2nd generation engine
UZ - Engine family
F - Economy narrow-angle DOHC
E - Multi Point Fuel Injection
| GENERAL TECHNICAL DATA |
Engine model ...................... 2UZ-FE
Cylinder layout ...................... Four stroke, V8
Fuel type ...................... Gasoline (petrol)
Year of production ...................... 1998-2011
Total displacement ...................... 4.7 L, 4,663 cc (284.55 cubic inches)
Fuel system ...................... Sequential multi-point fuel injection
(SFI)
Power adder ...................... None
Maximum power ...................... From 230 PS (169 kW; 227 HP) at
4,800 rpm
to 288 PS (212 kW; 284 HP) at 5,400 rpm
Maximum torque ...................... From 343 Nm (35 kgm, 253 ft-lb) at
3,400 rpm
to 450 Nm (45.9 kgm, 332 ft-lb) at 3,400 rpm
Firing order ...................... 1-8-4-3-6-5-7-2
Dimensions (L x W x H) ...................... No data available
Weight ...................... 255 kg (562.2 lbs))
| CYLINDER BLOCK |
The 2UZ-FE engine has a cast-iron cylinder block in a V arrangement at a
bank angle of 90 deg.. This engine’s firing order is 1-8-4-3-6-5-7-2. The
crankshaft is supported by 5 bearings. These bearings are made of
aluminum alloy. The engine is equipped with a fully balanced steel
crankshaft with five journals and eight counterweights.
The 2UZ-FE engine used forged and sintered connecting rods. Pistons are
made of high temperature-resistant aluminum alloy. Piston pins are the
full-floating type. After 2007 the piston shape was changed and oil jets
were introduced to cool the pistons. To conserve mass, plastic region
tightening bolts are used for the crankshaft bearing caps and connecting
rod caps. The Toyota 2UZ-FE motor has two compression and single oil
control rings.
A 94.0 mm (3.7 in) cylinder bore and 84.0 mm (3.31 in) piston stroke
give the 2UZ-FE engine a total of 4,663 cc of displacement. Compression
ratio rating is 9.6:1 for engines before 2007 and 10.0:1 for engines
after 2007.
Cylinder block alloy ...................... Cast-iron
Compression ratio ...................... 1998-2007: 9.6:1
2007-2011: 10.0:1
Cylinder bore ...................... 94.0 mm (3.7 in)
Piston stroke ...................... 84.0 mm (3.31 in)
Number of piston rings (compression / oil) ...................... 2 / 1
Number of main bearings ...................... 5
Cylinder inner diameter (standard) ...................... 94.002-94.010
mm (3.7009-3.7012 in)
Piston skirt diameter (standard) ...................... 93.902-93.912
mm (3.6969-3.6973 in)
Piston compression height ...................... No data available
Piston pin outer diameter ...................... 21.997-22.009 mm
(0.866-0.8665 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)
Connecting rod center distance ...................... No data available
Crankshaft main journal diameter ...................... 66.988-67.000
mm (2.6373-2.6378 in)
Crankpin diameter ...................... 51.982-52.000 mm
(2.0465-2.0472 in)
Crankshaft center distance ...................... 42 mm (1.655 in)
Main bearing cap bolts tightening procedure and torque specs:
Step 1: 27 Nm; 2.7 kgm; 20 ft-lb
Step 2: Turn bolts 90 deg.
After securing bearing cap bolts, make sure crankshaft turns smoothly by
hand.
Connecting rod bearing bolts
Step 1: 24.5 Nm; 2.5 kgm; 18 ft-lb
Step 2: Turn bolts 90 deg.
| CYLINDER HEAD |
The cylinder heads are made of aluminum alloy, with a cross-flow type
intake and exhaust layout and with pentroof type combustion chambers.
The 2UZ-FE engine has dual overhead camshafts design (DOHC) with four
valves per cylinder (32 valves in total). The intake camshafts are
driven by the timing belt, and a gear on the intake camshaft engages
with a gear on the exhaust camshaft to drive it. In 2007, the engine
began to use the VVTi (Variable Valve Timing-intelligent) system.
The intake valve head diameter is 34.5 mm (1.3583 in) and the exhaust
valve diameter is 29.0 mm (1.1417 in). To actuate the valves, this
engine used inner-shim type, steel valve lifters that are crowned on the
side-sliding portion to reduce friction. For the engine version after
2007, lead-free valve seats are used.
The 2UZ-FE motor was not equipped with hydraulic valve lifters,
therefore special shims are used to adjust the valve clearance.
The early version of the 2UZ-FE engine had a cast aluminum intake
manifold, a plastic intake manifold was used for the 2UZ-FE engine after
2007.
Block head alloy ...................... Aluminium
Valve Arrangement ...................... DOHC, belt drive
Cylinder head height ...................... No data available
Valves ...................... 32 (4 valves per cylinder)
Intake valve timing ...................... Non VVTi: 219 deg.
Exhaust valve timing ...................... Non VVTi: 229 deg.
Valve head diameter ...................... INTAKE
...................... 34.5 mm (1.3583 in)
EXHAUST ...................... 29.0 mm (1.1417 in)
Valve length ...................... INTAKE ...................... 95.05
mm (3.7421 in)
EXHAUST ...................... 95.10 mm (3.7441 in)
Valve stem diameter ...................... INTAKE
...................... 5.470-5.485 mm (0.2154-0.2159 in)
EXHAUST ...................... 5.465-5.480 mm (0.2152-0.2157 in)
Valve spring free length ...................... INTAKE
...................... 54.1 mm (2.1299 in)
EXHAUST ...................... 54.1 mm (2.1299 in)
Valve camshaft lobe height ...................... INTAKE
...................... 41.940-42.040 mm (1.6512-1.6551 in)
EXHAUST ...................... 41.960-42.060 mm (1.652-1.6559 in)
Camshaft journal diameter ...................... 26.954-26.970 mm
(1.0612-1.0618 in)
Head tightening procedure and torque specs:
Step 1: 32 Nm; 3.2 kgm; 24 ft-lb
Step 2: Turn all bolts 90 deg.
Step 3: Turn all bolts another 90 deg.
| MAINTENANCE DATA |
Valve clearance (Cold)
Intake valve ...................... 0.15-0.25 mm (0.006-0.010 in)
Exhaust valve ...................... 0.25-0.35 mm (0.010-0.014 in)
Compression pressure
Standard ...................... 12.2 kg/m2 / 300 rpm
Minimun ...................... 10.0 kg/m2 / 300 rpm
Compression differential limit between cylinders ......................
1.0 kg/m2 / 300 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles) ...................... up to
0.5 (1 qt. per 1200 miles)
Recommended engine oil ...................... 5W-30
Oil type API ...................... SL or SJ
Engine oil capacity (Refill capacity) ...................... With filter
change 6.4-6.8 liters
Without filter change 5.7-6.4 liters, depending on year and vehicle
model.
Oil change interval, km (miles) ...................... 8,000 (5,000)
Oil Pressure ...................... Idle speed: 29 kPa (0.3 kgf/cm 2 ,
4.3 psi) or more
3,000 rpm: 294 - 588 kPa (3.0 - 6.0 kgf/cm 2 , 43 - 85 psi)
Ignition system
Spark plug ...................... NGK: IFR6A11
DENSO: SK20R11.
Spark plug gap ...................... 1.1 mm (0.0433 in)
Spark plug tightening torque ...................... 17.5 Nm (1.8 kgm,
13 ft-lb)
Valve clearance adjustment data
Calculate the thickness of new adjusting valve shim so valve clearance
comes within specified values.
R = Thickness of removed valve shim
N = Thickness of new valve shim
M = Measured valve clearance
Intake:
N = R + [M - 0.20 mm (0.008 in)]
Exhaust:
N = R + [M - 0.30 mm (0.012 in)]
Valve shims are available in 41 sizes range from 2.00 mm (0.0787 in) to
2.80 mm (0.1102 in), in steps of 0.02 mm (0.0008 in).
Example (exhaust valve):
R = 2.10 mm
M = 0.52 mm
N = 2.10 + (0.45 - 0.30) = 2.25 mm.
| VEHICLE APPLICATIONS |
Model ...................... Years Produced
Lexus GX 470 ...................... 2002-2009
Lexus LX 470 ...................... 1998-2007
Toyota Land Cruiser ...................... 1998-2011
Toyota 4Runner ...................... 2002-2009
Toyota Tundra ...................... 1999-2009
Toyota Sequoia ...................... 2000-2009
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