The Toyota 3RZ-FE is a 2.7 L (2,693 cc, 164.3 cu·in) straight-four 4-stroke natural aspirated gasoline engine from Toyota RZ-family. The 3RZ-FE engine was manufactured by Toyota Motor Corporation from 1994 to 2004 on Kamigo Plant, Aichi Prefecture, Japan.
The 3RZ-FE engine features a cast-iron cylinder block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). The Toyota 3RZ-FE engine used electronically controlled Multipoint fuel injection system and Electronic Spark Advance (ESA) ignition system.
Compression ratio rating is 9:5:1. A 95.0 mm (3.74 in) cylinder bore and 95.0 mm (3.74 in) piston stroke give the 3RZ-FE engine a total of 2,693 cc (164.3 cu·in) of displacement. The 3RZ-FE engine produced 152 PS (112 kW; 150 HP) at 4,800 rpm of maximum horsepower and 240 N·m (24.5 kg·m, 176.9 ft·lb) at 4,000 rpm of peak torque.
The breakdown of the engine code is as follows:
- 3 – 3-rd generation engine
- RZ – Engine family
- F – Economy narrow-angle DOHC
- E – Multi-Point Fuel Injection
|Layout||Four stroke, Inline-4 (Straight-4)|
|Fuel type||Gasoline (petrol)|
|Displacement||2.7 L, 2,693 cm3 (164.3 cu in)|
|Fuel system||Multi-Point Fuel Injection|
|Power output||152 PS (112 kW; 150 HP) at 4,800 rpm|
|Torque output||217 N·m (22 kg·m, 159.9 ft·lb) at 4,000 rpm|
|Dimensions (L x W x H):||–|
|Weight||173 kg (381 lbs)|
The 3RZ-FE has a deep-skirt cast iron cylinder block with 95.0 mm (3.74 in) cylinder bore and 86.0 mm (3.39 in) piston stroke. Compression ratio rating is 9.5:1. This engine is equipped with twin counter-rotating balance shafts within the crankcase to cancel the secondary inertia forces.
The 3RZ-FE engine used a fully-balanced forged crankshaft with eight counterweights and 60.00 mm (2.36 in) of main journal diameter and 53.000 mm (2.08 in) of crankpin journal diameter. Plastic region tightening bolts are used for both the crankshaft main bearings and connecting rods.
The engine has connecting rods that are forged from carbon steel. For increased strength and durability, the connecting rods are shot-peened. The 3RZ-FE used aluminum alloy pistons with resin-coated skirts and two compression rings and a single oil ring. In each big-end bearing, an oil jet sprayed oil to cool the underside of the pistons.
|Cylinder block alloy||Cast-iron|
|Cylinder bore:||95.0 mm (3.74 in)|
|Piston stroke:||95.0 mm (3.74 in)|
|Number of piston rings (compression / oil):||2 / 1|
|Number of main bearings:||5|
|Cylinder inner diameter (standard):||94.990-95.003 mm (3.7398-3.7403 in)|
|Piston skirt diameter (standard):||94.933-94.943 mm (3.7375-3.7379 in)|
|Piston pin outer diameter:||24.000-24.009 mm (0.9449-0.9452 in)|
|Piston ring side clearance:||Top||0.020-0.070 mm (0.0008-0.0028 in)|
|Second||0.030-0.070 mm (0.0012-0.0028 in)|
|Piston ring end gap:||Top||0.300-0.400 mm (0.0118-0.0157 in)|
|Second||0.400-0.500 mm (0.0157-0.0197 in)|
|Crankshaft journal diameter:||
№3: 59.981-59.994 mm (2.2615-2.3620 in.)
Other: 59.987-60.000 mm (2.3617-2.3622 in.)
|Crankpin diameter:||52.987-53.000 mm (2.0861-2.0866 in)|
Crankshaft bearing cap tightening procedure and torque specs:
- Step 1: 39 Nm; 3.9 kg·m; 29 ft·lb
- Step 2: Turn all bolts 90°
After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.
Connecting rod bearing bolts
- Step 1: 45 Nm 4.6 kg·m; 33 ft·lb)
- Step 2: Turn bolts 90°
The cylinder head is made of aluminum alloy which gives it good cooling efficiency. The engine has dual overhead camshaft design with four valves per cylinder. The 3RZ-FE engine used plastic region tightening bolts for the cylinder head.
The intake camshaft is driven by a timing chain which has a hydraulic chain tensioner and oil jet for lubrication. The exhaust camshaft is driven via a scissors gear from the intake camshaft.
The 3RZ-FE engine has four valves per cylinder: two intakes and two exhaust. The intake valves have a 37.5 mm (1.4764 in) diameter, exhaust valves have a 30.5 mm (1.2008 in) diameter. Intake duration is 230 degrees and exhaust duration is 224 degrees. This engine does not use hydraulic lifters, so you need to adjust the valves clearances every 30,000 km (20,000 miles) of mileage.
|Valve Arrangement:||DOHC, chain drive|
|Valves:||16 (4 valves per cylinder)|
|Valve head diameter:||INTAKE||37.5 mm (1.4764 in)|
|EXHAUST||30.5 mm (1.2008 in)|
|Valve length:||INTAKE||103.45 mm (4.0728 in)|
|EXHAUST||103.60 mm (4.0787 in)|
|Valve stem diameter:||INTAKE||5.970-5.985 mm (0.235-0.2356 in)|
|EXHAUST||5.965-5.980 mm (0.2348-0.2354 in)|
|Camshaft cam height:||INTAKE||45.31-45.41 mm (1.7839-1.7878 in)|
|EXHAUST||45.06-45.16 mm (1.774-1.7779 in)|
|Outer camshaft journal diameter:||26.959-26.975 mm (1.0614-1.062 in)|
Head tightening procedure and torque specs:
- Step 1: 39 Nm; 4.0 kg·m; 29 ft·lb
- Step 2: Turn all bolts 90°
- Step 3: Turn all bolts another 90°
|Valve clearance (Cold)|
|Intake valve (COLD)||0.15-0.25 mm (0.006-0.010 in)|
|Exhaust valve (COLD)||0.29-0.39 mm (0.0114-0.0154 in)|
|Standard||12.5 kgf/cm2 (178 psi) / 200 rpm|
|Minimun||9.0 kgf/cm2 (127 psi) / 200 rpm|
|Compression differential limit between cylinders||1.0 kgf/cm2 (14 psi) / 200 rpm|
|Oil consumption , L/1000 km (qt. per miles)||up to 0.5 (1 qt. per 1200 miles)|
|Recommended engine oil||5W-30, 10W-30|
|Oil type API||SL “Energy-Conserving”|
|Engine oil capacity (Refill capacity)||4.7-5.5 liters (5.0-5.8 US qts, 4.1-4.8 imp. qts)|
|Oil change interval, km (miles)||5,000-10,000 (3,000-6,000)|
Idle spped: 29 kPa (0.3 kg/cm3; 4.2 psi)
At 3,000 rpm: 245-490 kPa (2.5-5.0 kg/cm3; 36-71 psi)
|Spark plug||DENSO: K16R–U11, NGK: BKR5EYA–U|
|Spark plug gap||1.0-1.1 mm (0.0394-0.0433 in)|
|Spark plug torque||20 N·m (2 kg·m, 14.7 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 17 sizes to range from 2.500 mm (0.0984 in.) to 3.300 mm (0.1299 in.), in steps of 0.05 mm (0.0020 in).
Example (exhaust valve):
R = 2.650 mm
M = 0.500 mm
N = 2.650 + (0.50 – 0.30) = 2.800 mm.
|Toyota Land Cruiser Prado||1996–2004|
|Toyota Touring Hiace||1998–2002|