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Toyota 1NZ-FE Engine Specifications
The Toyota 1NZ-FE is a 1.5 L (1,497 cc, 91.35 cubic inches) straight-four 4-stroke naturally aspirated gasoline engine from Toyota NZ-family. The 1NZ-FE engine was manufactured on Kamigo Plant since 1999. The 1NZ-FE engine features a lightweight aluminum block and aluminum cylinder head with two overhead camshafts (DOHC) and four valves per cylinder (16 in total). Compression ratio rating is 10.5:1. Cylinder bore and piston stroke are 75.0 mm (2.95 in) and 84.7 mm (3.34 in), respectively. The Toyota 1NZ-FE engine has electronic fuel injection system, VVT-i (Variable Valve Timing with intelligence) system on the intake side, ETCS-i (Electronic Throttle Control System-intelligent) and DIS-4 ignition system with individual ignition coil for each spark plug. The 1NZ-FE engine was redesigned in 2003 due to the introduction of Euro IV emissions regulations. The following changes were made to the engine: Piston shape was changed; The shape of the exhaust manifold was modified; Construction of the three-way catalytic converter was changed; Three-way catalytic converter was fitted; The 16 tit ECU was changed to 32 bit. The engine produced 110 PS (81 kW; 109 HP) at 6,000 rpm of maximum horsepower and 143 Nm (14.6 kgm; 105.6 ft-lb) at 4,000 rpm of peak torque.
Engine code identification:
1 – 1-st generation engine
NZ – Engine family
F – Economy narrow-angle DOHC
E – Multi Point Fuel Injection
| GENERAL TECHNICAL DATA |
Engine model ...................... 1NZ-FE
Cylinder layout ...................... Four stroke, Inline-4 (Straight-4)
Fuel type ...................... Gasoline (petrol)
Year of production ...................... 1999-
Total displacement ...................... 1.5 L, 1,497 cm3 (91.35 cubic inches)
Fuel system ...................... Electronic Fuel Injection (EFI)
Power adder ...................... None
Maximum power ...................... 110 PS (81 KW; 109 HP) at 6,000 rpm
Maximum torque ...................... 143 Nm (14.6 kgm; 105.6 ft-lb) at
4,000 rpm
Firing order ...................... 1-3-4-2
Dimensions (L x W x H) ...................... No data available
Weight ...................... 87 kg (191.2 lbs)
| CYLINDER BLOCK |
The Toyota 1NZ-FE has an aluminum cylinder block with five bearing
support system and thin-walled cast iron liners. It has a 75.0 mm (2.95
in) cylinder bore and 84.7 mm (3.33 in) piston stroke. The engine has
two compression and single oil control ring.
The steel connecting rods for the 1NZ-FE engine has caps that were held
by plastic region tightening bolts. The engine is equipped with aluminum
alloy pistons, semi-floating type piston pins and low-tension rings (two
compression and single oil control ring).
Cylinder block alloy ...................... Aluminium
Compression ratio ...................... 10.5:1
Cylinder bore ...................... 75.0 mm (2.95 in)
Piston stroke ...................... 84.7 mm (3.34 in)
Number of piston rings (compression / oil) ...................... 2 / 1
Number of main bearings ...................... 5
Cylinder inner diameter (standard) ...................... 75.000-75.013
mm (2.9527-2.9528 in)
Piston skirt diameter (standard) ...................... 74.945-74.955
mm (2.9506-2.9510 in)
Piston pin outer diameter ...................... 18.001-18.004 mm
(0.7087-0.7088 in)
Piston ring side clearance ...................... Top
...................... 0.030-0.070 mm (0.0012-0.0027 in)
Second ...................... 0.020-0.060 mm (0.008-0.0024 in)
Oil ...................... 0.070-0.150 mm (0.0027-0.0059 in)
Piston ring end gap ...................... Top ......................
0.25-0.35 mm (0.0098-0.0138 in)
Second ...................... 0.35-0.50 mm (0.0138-0.0197 in)
Oil ...................... 0.10-0.35 mm (0.0039-0.0138 in)
Crankshaft journal diameter ...................... 45.988-46.000 mm
(1.8105-1.8110 in)
Crankpin diameter ...................... 39.992-40.000 mm
(1.5745-1.5748 in)
Main bearing cap bolts tightening procedure and torque specs:
Step 1: 22 Nm; 2.2 kgm; 16.2 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: 15 Nm; 1.5 kgm; 11 ft-lb
Step 2: Turn bolts 90°
Crankshaft pulley bolt
128 Nm; 13.0 kgm; 94.5 ft-lb
Drive plate (A/T) fixing bolts
88 Nm; 8.8 kgm; 65 ft-lb
| CYLINDER HEAD |
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 engine has a pentroof type combustion chamber
and cross-flow manifolds.
The 1NZ-FE used Variable Valve Timing with intelligence system (VVT-i)
on the intake camshaft. Intake valves are 30.5 mm (1.20 in) in diameter,
and the exhaust valves are 25.5 mm (1.00 in). Until 2004, the engine did
not have hydraulic lifters, so special valve shims were used to adjust
the valve clearance.
Valve Arrangement ...................... DOHC, chain drive
Valves ...................... 16 (4 valves per cylinder)
Valve head diameter ...................... INTAKE
...................... 30.5 mm (1.20 in)
EXHAUST ...................... 25.5 mm (1.00 in)
Valve length ...................... INTAKE ...................... 89.25
mm (3.5138 in)
EXHAUST ...................... 87.90 mm (3.4606 in)
Valve stem diameter ...................... INTAKE
...................... 4.970-4.985 mm (0.1957-0.1963 in.)
EXHAUST ...................... 4.965-4.980 mm (0.1955-0.1961 in.)
Valve spring free length ...................... 45.05-45.15 mm
(1.774-1.778 in.)
Camshaft cam height ...................... INTAKE
...................... 44.617-44.717 mm (1.7566-1.7605 in.)
EXHAUST ...................... 44.666-44.766 mm (1.7585-1.7624 in.)
Outer camshaft journal diameter ...................... №1
...................... 34.449-34.465 mm (1.3563-1.3569 in.)
Other journals diameter ...................... 22.949-22.965 mm
(0.9035-0.9041 in.)
Head tightening procedure and torque specs:
Step 1: 29 Nm; 3.0 kgm; 22 ft-lb
Step 2: Turn all bolts 90°
Step 3: Turn all bolts another 90°
Camshaft timing sprocket
64 Nm; 6.5 kgm; 47 ft-lb
| MAINTENANCE DATA |
Valve clearance
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 ...................... 15.0 kg/m2 (213 psi) / 200 rpm
Minimun ...................... 11.0 kg/m2 (156 psi) / 200 rpm
Compression differential limit between cylinders ......................
1.0 kg/m2 / 200 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, 10W-30
Oil type API ...................... SJ or higher
Engine oil capacity (Refill capacity) ...................... With filter
change 3.4 l
Without filter change 3,7 l
Oil change interval, km (miles) ...................... 5,000-10,000
(3,000-6,000)
Ignition system
Spark plug ...................... DENSO: K16R-11, NGK: KBR5EYA-11
Spark plug gap ...................... 1.1 mm (0.043 in)
Valve clearance adjustment data
Calculate the thickness of new adjusting valve lifter so valve clearance
comes within specified values.
R = Thickness of removed valve lifter
N = Thickness of new valve lifter
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 lifters are available in 35 sizes to range from 5.06 mm (0.1992
in) to 5.74 mm (0.2259 in), in steps of 0.02 mm (0.0008 in).
Example (intake valve):
R = 5.10 mm
M = 0.52 mm
N = 5.10 + (0.52 – 0.20) = 5.42 mm.
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