Toyota 1S-I, 1S-IL, 1S-ILU

Toyota 1S-I, 1S-IL, 1S-ILUThe Toyota 1S-i, 1S-iL, 1S-iLU is a 1.8 L (1,832 cc, 111.8 cu-in) straight-four, natural aspirated four-stroke liquid-cooled internal combustion vertical gasoline engine from the Toyota S-series. This engine has been manufactured by Toyota Motor Corporation since 1984.

Cylinder bore and piston stroke are 80.5 mm (3.17 in) and 90.0 mm (3.54 in), respectively. Compression ratio rating is 90.0:1.

This engine produced 85.0 PS (63 KW; 84.5 HP) at 5,200 rpm or 105.0 PS (77 KW; 103.5 HP) at 5,400 rpm of horsepower and from 142 Nm (14.5 kg·m; 104.8 ft·lb) at 3,000 rpm to 160 Nm (16.3 kg·m; 118.1 ft·lb) at 3,000 rpm of torque.

The Toyota 1NZ-FE features:

  • Cast-iron cylinder block
  • Aluminum cylinder head
  • SOHC design (8 valves, 2 per cylinder)
  • Hydraulic valve lifters
  • Single-point fuel injection system (Central injection)
  • Ignition system with mechanical distributor
  • Liquid cooling system
  • Electric starter

General information

Engine Specifications
Engine model1S-i, 1S-iL, 1S-iLU, 3S-Ci
Engine type4-stroke, OHV, straight-four
Displacement1.8 L, 1,832 cm3, (111.8 cu·in)
Max. horsepower 85.0 PS (63 KW; 84.5 HP) at 5,200 rpm
105.0 PS (77 KW; 103.5 HP) at 5,400 rpm
Max. torque 142 Nm (14.5 kg·m; 104.8 ft·lb) at 3,000 rpm
157 Nm (16.0 kg·m; 115.9 ft·lb) at 3,000 rpm
160 Nm (16.3 kg·m; 118.1 ft·lb) at 3,000 rpm
Power adderNone
Cooling systemLiquid-cooled
Lubricating systemForced lubrication
Ignition systemWith mechanical distributor
Fuel systemSingle-point fuel injection system
Fuel usedGasoline
Starting systemElectric starter
Firing order:1-3-4-2
Dimensions (L x W X H)
Dry weight

Cylinder Block and Head

Cylinder block
Cylinder block alloy:Cast-iron
Compression ratio:9.0:1
Cylinder bore:80.5 mm (3.17 in)
Piston stroke:90.0 mm (3.54 in)
Cylinder internal diameter (standard):80.500-80.530 mm (3.1693-3.1705 in)
Piston skirt outer diameter (standard):80.443-80.473 mm (3.1670-3.1682 in)
Number of piston rings (compression / oil):2/1
Ring side clearance (Top):0.030-0.070 mm (0.0012-0.0027 in)
Ring side clearance (Second):0.030-0.070 mm (0.0012-0.0028 in)
Ring end gap (Top):0.270-0.500 mm (0.0106-0.0197 in)
Ring end gap (Second):0.200-0.450 mm (0.0079-0.0177 in)
Ring end gap (Oil):0.200-0.790 mm (0.0079-0.0311 in)
Crankshaft main journal diameter:54.985-55.000 mm (2.1648-2.1653 in)
Crankpin journal diameter:47.985-48.000 mm (1.8892-1.8898 in)
Cylinder head
Cylinder head alloy:Aluminium
Valve arrangement:SOHC, belt drive
Valves:2,(8 valves in total)
Valve head diameter (INTAKE):
Valve head diameter (EXHAUST):
Valve length (INTAKE):109.7 mm (4.319 in)
Valve length (EXHAUST):109.3 mm (4.303 in)
Valve steam diameter (INTAKE):4.970-4.985 mm (0.1957-0.1963 in)
Valve steam diameter (EXHAUST):4.965-4.980 mm (0.1955-0.1961 in)
Valve spring free length (INTAKE):46.71 mm (1.8390 in)
Valve spring free length (EXHAUST):46.71 mm (1.8390 in)
Camshaft lobe height (INTAKE):38.926-38.026 mm (1.5325-1.5365 in)
Camshaft lobe height (EXHAUST):38.926-38.026 mm (1.5325-1.5365 in)
Camshaft journal diameter: № 1: 46.459-46.475 mm (1.8291-1.8297 in)
№ 2: 46.209-46.225 mm (1.8192-1.8199 in)
№ 3: 45.959-45.975 mm (1.8094-1.8100 in)
№ 4: 45.709-45.725 mm (1.7996-1.8002 in)
№ 5: 45.459-45.475 mm (1.7897-1.7904 in)
№ 6: 45.209-45.225 mm (1.7799-1.7805 in)

Service Data

Cylinder compression pressure
Standard:12.5 kg/m2 (1,226 kPa, 213 psi) / 280 rpm
Minimum:9.0 kg/m2 (883 kPa, 156 psi) / 250 rpm
Compression differential limit between cylinders:1.0 kg/m2 (98 kPa 14 psi) / 250 rpm
Oil system
Lubrication system:Forced lubrication
Recommended engine oil SAE:5W-30, 10W-30
Oil type API:SF, SG or higher
Oil capacity: With oil filter: 4.0 liters (4.23 US.qts, 3.52 Imp. qts)
Without oil filter: 3.6 liters (3.8 US.qts, 3.17 Imp. qts)
Oil change interval, km (miles):5,000-10,000 (3,000-6,000)
Oil pressure: At Idling speed: 0.3 kg/m2 (29 kPa, 4.3 psi) or more
At 3,000 rpm: 2.5-5.0 kg/m2 (36-71 kPa, 245-490 psi)
Ignition system
Ignition timing:5° B.T.D.C. (for Toyota Camry/Vista SV20)
Spark plug:DENSO: BRE527Y-11, NGK: J16AR-11
Spark plug gap:1.1 mm (0.043 in)

Tightening torque specs

Tightening torque specs
Cylinder head64 Nm (6.5 kgf·m; 47.2 ft·lb)
Camshaft timing pulley54 Nm (5.5 kgf·m; 39.9 ft·lb)
Main bearing cap bolts60 Nm (6.1 kgf·m; 44 ft·lb)
Connecting rod bearing bolts49 Nm (5.0 kgf·m; 36.2 ft·lb)
Crankshaft pulley pulley108 Nm (11 kgf·m; 79.7 ft·lb)

Vehicle applications

ModelYears Produced
Toyota Camry (SV10)
Toyota Vista (SV10)
Toyota Camry (SV20)
Toyota Vista (SV20)
Toyota Carina (ST150)
Toyota Carina ED (ST160)
Toyota Celica (ST160)
Toyota Corona (ST150)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

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