Toyota 1G-GZE

Toyota 1G-GZEThe Toyota 1G-GZE is a 2.0 L (1,988 cc, 121.3 cu·in) straight-six, supercharged four-stroke liquid-cooled internal combustion vertical gasoline engine, manufactured by Toyota from 1988 to 1991.

A 75.0 mm (2.95 in) cylinder bore and 75.0 mm (2.95 in) piston stroke give the 1G-GZE engine a total of 1,988 cc of displacement. The compression ratio rating is 8.0:1.

The Toyota 1G-GZE engine produced 170 PS (125 KW; 168 HP) at 6,000 rpm of maximum horsepower and 226 Nm (23.0 kg·m; 166.8 ft·lb) at 3,800 rpm of peak torque.

The Toyota 1G-GZE features:

  • Cast-iron cylinder block
  • Aluminum cylinder head
  • DOHC design (Dual belt-driven overhead camshafts)
  • SC14 supercharger
  • Distributorless ignition system (DIS)
  • Multi-Point fuel injection
  • Forced lubrication system
  • Liquid cooling system
  • Electric starter

General information

Engine Specifications
Engine model1G-GZE
Engine type4-stroke, DOHC, straight-six
Displacement2.0 L, 1,988 cm3 (121.3 cu in)
Max. horsepower170 PS (125 KW; 168 HP) at 6,000 rpm
Max. torque226 Nm (23.0 kg·m; 166.8 ft·lb) at 3,800 rpm
Cooling systemLiquid-cooled
Lubricating systemForced lubrication
Ignition systemDistributorless ignition system (DIS)
Fuel systemMulti-Point fuel injection)
Power adderSupercharger SC14
Fuel usedGasoline
Starting systemElectric starter
Firing order:1-5-3-6-2-4
Dimensions (L x W X H)
Dry weight200 kg (441 lbs)

Cylinder Block and Head

Cylinder block
Cylinder block alloy:Cast-iron
Compression ratio:8.0:1
Cylinder bore:75.0 mm (2.95 in)
Piston stroke:75.0 mm (2.95 in)
Cylinder internal diameter (standard): №1,6: 74.990-75.000 mm (2.9524-2.9528 in)
№2,3,4,5: 75.000-75.010 mm (2.9528-2.9532 in)
Piston skirt outer diameter (standard):74.935-74.945 mm (2.9502-2.9506 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): №1,6: 0.220-0.460 mm (0.0086-0.0181 in)
№2,3,4,5: 0.250-0.490 mm (0.0098-0.0192 in)
Ring end gap (Second): №1,6: 0.070-0.390 mm (0.0027-0.0153 in)
№2,3,4,5: 0.100-0.420 mm (0.0039-0.0165 in)
Ring end gap (Oil): №1,6: 0.170-0.690 mm (0.0066-0.0271 in)
№2,3,4,5: 0.200-0.790 mm (0.0078-0.0311 in)
Number of main bearings:7
Crankshaft main journal diameter: №4: 54.977-54.992 mm (2.1644-2.1650 in)
Other: 54.985-55.000 mm (2.1647-2.1653 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):93.800-94.600 mm (3.6929-3.7244 in)
Valve length (EXHAUST):93.850-94.650 mm (3.6949-3.7264 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)
Camshaft journal diameter:26.960-26.975 mm (1.0614-1.0620 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:11.0 kg/cm2, 156 psi/ 300 rpm
Minimum:8.5 kg/cm2, 121 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 BKR6EPN8
Spark plug gap:0.7-0.8 mm (0.027-0.031 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-GZE 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 Cresta (X80)1988-1990
Toyota Chaser (X80)1988-1990
Toyota Crown (S130)1989-1991
Toyota Mark II (X80)1988-1990
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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