The Toyota 2UZ-FE is a 4.7 l (4,663 cc, 284.55 cu·in) 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° 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 cu·in) of displacement. Compression ratio rating is 9.6:1 (before 2007) or 10.0:1 (after 2007).
The Toyota 2UZ-FE 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 N·m (35 kg·m, 253 ft·lb) at 3,400 rpm to 450 N·m (45.9 kg·m, 332 ft·lb) at 3,400 rpm of peak torque depending on year and vehicle model.
The breakdown of the engine code is as follows:
- 2 – 2nd generation engine
- UZ – Engine family
- F – Economy narrow-angle DOHC
- E – Multi Point Fuel Injection
|Layout||Four stroke, V8|
|Fuel type||Gasoline (petrol)|
|Displacement||4.7 L, 4,663 cc (284.55 cu in)|
|Fuel system||Sequential multi-point fuel injection (SFI)|
From 230 PS (169 kW; 227 HP) at 4,800 rpm
to 288 PS (212 kW; 284 HP) at 5,400 rpm
From 343 N·m (35 kg·m, 253 ft·lb) at 3,400 rpm
to 450 N·m (45.9 kg·m, 332 ft·lb) at 3,400 rpm
|Dimensions (L x W x H):||–|
|Weight||255 kg (562.2 lbs))|
The 2UZ–FE engine has a cast-iron cylinder block in a V arrangement at a bank angle of 90°. 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|
|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:||–|
|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:||–|
|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 kg·m; 20 ft·lb
- Step 2: Turn bolts 90°
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- Step 1: 24.5 Nm; 2.5 kg·m; 18 ft·lb
- Step 2: Turn bolts 90°
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:||–|
|Valves:||32 (4 valves per cylinder)|
|Intake valve timing:||Non VVTi: 219°|
|Exhaust valve timing:||Non VVTi: 229°|
|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 kg·m; 24 ft·lb
- Step 2: Turn all bolts 90°
- Step 3: Turn all bolts another 90°
|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)|
|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 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)|
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)
|Spark plug||NGK: IFR6A11
|Spark plug gap||1.1 mm (0.0433 in)|
|Spark plug tightening torque||17.5 Nm (1.8 kg⋅m, 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
N = R + [M – 0.20 mm (0.008 in)]
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.
|Lexus GX 470||2002–2009|
|Lexus LX 470||1998–2007|
|Toyota Land Cruiser||1998–2011|