Toyota 1G-GE

Toyota 1G-GEThe Toyota 1G-GE is a 2.0 L (1,988 cc, 121.3 cu·in) straight-six, natural aspirated four-stroke liquid-cooled internal combustion vertical gasoline engine, manufactured by Toyota from 1988 to 1993.

A 75.0 mm (2.95 in) cylinder bore and 75.0 mm (2.95 in) piston stroke give the 1G-GE engine a total of 1,988 cc of displacement. The compression ratio rating is 9.5:1.

The Toyota 1G-GE engine produced 140.0 PS (103.0 KW; 138.0 HP) at 6,000 rpm or 150.0 PS (110.0 KW; 147.0 HP) at 6,000 rpm of maximum horsepower and from 173 Nm (17.6 kg·m; 127.7 ft·lb) at 4,000 rpm to 182 Nm (18.6 kg·m; 134.3 ft·lb) at 5,600 rpm of peak torque.

The Toyota 1G-GE features:

  • Cast-iron cylinder block
  • Aluminum cylinder head
  • DOHC design (Dual belt-driven overhead camshafts)
  • Multi-Point fuel injection
  • Forced lubrication system
  • Liquid cooling system
  • Electric starter

General information

Engine Specifications
Engine model1G-GE
Engine type4-stroke, DOHC, straight-six
Displacement2.0 L, 1,988 cm3 (121.3 cu in)
Max. horsepower 140.0 PS (103.0 KW; 138.0 HP) at 6,000 rpm
150.0 PS (110.0 KW; 147.0 HP) at 6,000 rpm
Max. torque 173 Nm (17.6 kg·m; 127.7 ft·lb) at 4,000 rpm
181 Nm (18.5 kg·m; 133.6 ft·lb) at 5,600 rpm
182 Nm (18.6 kg·m; 134.3 ft·lb) at 5,600 rpm
Cooling systemLiquid-cooled
Lubricating systemForced lubrication
Ignition system
Fuel systemMulti-Point fuel injection)
Fuel usedGasoline
Starting systemElectric starter
Firing order:1-5-3-6-2-4
Dimensions (L x W X H)
Dry weight190 kg (419 lbs)

Cylinder Block and Head

Cylinder block
Cylinder block alloy:Cast-iron
Compression ratio:9.5:1
Cylinder bore:75.0 mm (2.95 in)
Piston stroke:75.0 mm (2.95 in)
Cylinder internal diameter (standard): №1,6: 74.990-75.020 mm (2.9524-2.9535 in)
№2,3,4,5: 75.000-75.030 mm (2.9528-2.9539 in)
Piston skirt outer diameter (standard):74.960-74.990 mm (2.9512-2.9523 in)
Number of piston rings (compression / oil):2/1
Ring side clearance (Top):0.040-0.080 mm (0.0016-0.0031 in)
Ring side clearance (Second):0.030-0.070 mm (0.0012-0.0028 in)
Ring end gap (Top):0.250-0.490 mm (0.0098-0.0192 in)
Ring end gap (Second):0.200-0.270 mm (0.0079-0.0106 in)
Ring end gap (Oil):0.200-0.820 mm (0.0079-0.0323 in)
Number of main bearings:7
Crankshaft main journal diameter:54.955-55.000 mm (2.1636-2.1653 in)
Crankpin journal diameter:41.985-42.000 mm (1.6529-1.6535 in)
Cylinder head
Cylinder head alloy:Aluminum
Valve arrangement:DOHC, belt driven
Valves:4,(24 valves in total)
Valve head diameter (INTAKE):
Valve head diameter (EXHAUST):
Valve length (INTAKE):94.20 mm (3.7086 in)
Valve length (EXHAUST):94.25 mm (3.7106 in)
Valve steam diameter (INTAKE):5.960-5.975 mm (0.2346-0.2352 in)
Valve steam diameter (EXHAUST):5.955-5.970 mm (0.2344-0.2350 in)
Valve spring free length (INTAKE):43.85 mm (1.7264 in)
Valve spring free length (EXHAUST):43.85 mm (1.7264 in)
Camshaft lobe height (INTAKE):35.510-35.610 mm (1.3980-1.4019 in)
Camshaft lobe height (EXHAUST):35.510-35.610 mm (1.3980-1.4019 in)

Tightening torque

Tightening torque specs
Cylinder head:64 Nm (6.5 kg·m; 47.2 lb·ft)
Main bearing cap bolts:60 Nm (6.1 kg·m; 44.3 lb·ft)
Connecting rods cap bolts:50 Nm (5.1 kg·m; 36.9 lb·ft)
Spark plug:18 N·m (1.8 kg·m, 13.3 lb·ft)

Service Data

Valve clearance
Intake valve clearance:0.15-0.25 mm (0.0060-0.0100 in)
Exhaust valve clearance:0.20-0.30 mm (0.0078-0.0118 in)
Cylinder compression pressure
Standard:13.0 kg/cm2, 185 psi/ 300 rpm
Minimum:10.0 kg/cm2, 142 psi/ 300 rpm
Oil system
Lubrication system:Forced lubrication
Recommended engine oil, SAE:10W-30
Oil type, API:SG or better
Engine oil capacity:3.9 liters (4.12 US.qts, 3.43 Imp. qts)
Oil change interval, km (miles):10,000 (6,000)
Ignition system
Spark plug:DENSO PQ20R8, NGK BCPR6EP-11
Spark plug gap:1.0-1.1 mm (0.039-0.043 in)
Spark plug torque:18 N·m (1.8 kg·m, 13.3 lb·ft)

Valve clearance adjustment data

Calculate the thickness of the 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

N = R + [M – 0.20 mm (0.008 in)]
N = R + [M – 0.25 mm (0.010 in)]

For 1G-GE engine valve lifters are available in 27 sizes to range from 2.00 mm (0.0787 in) to 3.30 mm (0.1299 in), in steps of 0.05 mm (0.0019 in).

Vehicle applications

ModelYears Produced
Toyota Chaser (X80)1988-1992
Toyota Cresta (X80)1988-1992
Toyota Crown (S130)1988-1991
Toyota Mark II (X80)1988-1992
Toyota Soarer (Z20)1988-1991
Toyota Supra (A70)1988-1993
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.

ATTENTION! Dear visitors, this is an informational database of technical specifications, we are not a parts supplier or a marketplace.

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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