The 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 model | 1G-GZE |
| Engine type | 4-stroke, DOHC, straight-six |
| Displacement | 2.0 L, 1,988 cm3 (121.3 cu in) |
| Max. horsepower | 170 PS (125 KW; 168 HP) at 6,000 rpm |
| Max. torque | 226 Nm (23.0 kg·m; 166.8 ft·lb) at 3,800 rpm |
| Cooling system | Liquid-cooled |
| Lubricating system | Forced lubrication |
| Ignition system | Distributorless ignition system (DIS) |
| Fuel system | Multi-Point fuel injection) |
| Power adder | Supercharger SC14 |
| Fuel used | Gasoline |
| Starting system | Electric starter |
| Firing order: | 1-5-3-6-2-4 |
| Dimensions (L x W X H) | – |
| Dry weight | 200 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/cm |
| 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
Intake:
N = R + [M – 0.20 mm (0.008 in)]
Exhaust:
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
| Model | Years Produced |
| Toyota Cresta (X80) | 1988-1990 |
| Toyota Chaser (X80) | 1988-1990 |
| Toyota Crown (S130) | 1989-1991 |
| Toyota Mark II (X80) | 1988-1990 |
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