The Toyota 1G-GZE is a 2.0 L (1,988 cc, 121.3 cu·in) straight-six, four-stroke cycle supercharged gasoline engine from the Toyota G-family. The engine was manufactured by Toyota Motor Corporation from 1988 to 1991.
The Toyota 1G-GZE engine features a cast-iron cylinder block, aluminum cylinder head with dual belt-driven overhead camshafts (DOHC), four valves per cylinder (24 in total) and Supercharger SC14. The 1G-GZE is equipped with an electronic fuel injection system and a distributorless ignition system (DIS).
Cylinder bore and piston stroke are 75.0 mm (2.95 in) and 75.0 mm (2.95 in), respectively. The Compression ratio rating is 8.0:1.
This 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 breakdown of the engine code is as follows:
- 1 – 1 generation engine
- G – Engine family
- G – Performance wide-angle DOHC
- Z – Supercharged
- E – Multi-Point Fuel Injection
General information
| Engine Specifications | |
| Engine code | 1G-GZE |
| Layout | Four stroke, Inline-6 (Straight-6) |
| Fuel type | Gasoline |
| Production | 1988-1991 |
| Displacement | 2.0 L, 1,988 cm3 (121.3 cu in) |
| Fuel system | Multi-point fuel injection system |
| Power adder | Supercharger SC14 |
| 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 |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | 200 kg (441 lbs) |
Cylinder block
The Toyota 1G-GZE engine has a cast-iron cylinder block, bore is 75.0 mm (2.95 in) and the piston stroke is 75.0 mm (2.95 in). The cylinder block, a monoblock specially cast structure, employs the seven bearing support system. The crankshaft has seven journals.
The pistons are aluminum casting. Each piston is fitted with two compression rings and a single oil ring. The compression ratio rating is 8.0:1.
| 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) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 7 | |
| Cylinder inner 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 diameter (standard): | 74.925-74.935 mm (2.9498-2.9502 in) | |
| Piston pin outer diameter: | 17.999-18.011 mm (0.7086-0.7090 in) | |
| Piston ring side clearance: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Piston 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) |
| 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) |
|
| 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) |
|
| 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 diameter: | 41.985-42.000 mm (1.6529-1.6535 in) | |
Main bearing cap bolts torque specs:
- 60 Nm; 6.1 kg·m; 44.3 ft·lb
Connecting rods cap bolts torque specs:
- 50 Nm 5.1 kg·m; 36.9 ft·lb
Cylinder head
The cylinder head is made of a light, strong aluminum alloy with good cooling efficiency. The 1G-GZE engine has double camshafts (DOHC) and four valves per cylinder (24 valves in total). The 1G-GZE motor does not have hydraulic lifters, so special valve lifters are used to adjust the valve clearance.
| Cylinder head alloy: | Aluminum | |
| Valve Arrangement: | DOHC, belt drive | |
| Valves: | 24 (4 valves per cylinder) | |
| Intake duration: | – | |
| Exhaust duration: | – | |
| Valve head diameter: | INTAKE | – |
| EXHAUST | – | |
| Valve length: | INTAKE | 93.800-94.600 mm (3.6929-3.7244 in) |
| EXHAUST | 93.850-94.650 mm (3.6949-3.7264 in) | |
| Valve stem diameter: | INTAKE | 5.960-5.975 mm (0.2346-0.2352 in) |
| EXHAUST | 5.955-5.970 mm (0.2344-0.2350 in) | |
| Valve spring free length: | 43.85 mm (1.7264 in) | |
| Camshaft lobe height: | INTAKE | 35.510-35.610 mm (1.3980-1.4019 in) |
| EXHAUST | 35.510-35.610 mm (1.3980-1.4019 in) | |
| Camshaft journal diameter: | 26.960-26.975 mm (1.0614-1.0620 in) | |
Cylinder head torque specs:
- 64 Nm; 6.5 kg·m; 47.2 ft·lb
Maintenance data
| Valve clearance (Cold) | |
| Intake valve (COLD) | 0.15-0.25 mm (0.006-0.0100 in) |
| Exhaust valve (COLD) | 0.20-0.30 mm (0.0078-0.0118 in) |
| Compression pressure | |
| Standard | 11.0 kg/cm2 / 300 rpm |
| Minimun | 8.5 kg/cm2 / 300 rpm |
| Oil system | |
| Oil consumption , L/1000 km (qt. per miles) | up to 0.5 (1 qt. per 1200 miles) |
| Recommended engine oil | 10W-30 |
| Oil type API | SG or better |
| Engine oil capacity (Refill 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 ft·lb) |
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 |
Author:
Appreciate all these specs, any info on the radiator?