Toyota 1G-GTE

Toyota 1G-GTEThe Toyota 1G-GTE is a 2.0 L (1,988 cc, 121.3 cu·in) straight-six, four-stroke cycle twin-turbo gasoline engine from the Toyota G-family. The engine was manufactured by Toyota Motor Corporation from 1988 to 1991.

The Toyota 1G-GTE 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 twin CT12S turbochargers. The 1G-GTE is equipped with an electronic fuel injection system.

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 8.5:1.

This engine produced 210 PS (154 KW; 206.5 HP) at 6,200 rpm of maximum horsepower and 275 Nm (28.05 kg·m; 202.95 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
  • T – Turbocharged
  • E – Multi-Point Fuel Injection

General information

Engine Specifications
Engine code1G-GTE
LayoutFour stroke, Inline-6 (Straight-6)
Fuel typeGasoline
Displacement2.0 L, 1,988 cm3 (121.3 cu in)
Fuel systemMulti-point fuel injection system
Power adderTwin CT12S turbochargers
Max. horsepower210 PS (154 KW; 206.5 HP) at 6,200 rpm
Max. torque275 Nm (28.05 kg·m; 202.95 ft·lb) at 3,800 rpm
Firing order1-5-3-6-2-4
Dimensions (L x H x W):
Weight215 kg (474 lbs)

Cylinder block

The Toyota 1G-GTE 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 8.5:1.

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:8.5:1
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):74.935-74.945 mm (2.9502-2.9506 in)
Piston pin outer diameter:17.999-18.011 mm (0.7086-0.7090 in)
Piston ring side clearance:Top0.030-0.070 mm (0.0012-0.0027 in)
Second0.020-0.060 mm (0.0008-0.0023 in)
Piston ring end gap:Top №1,6: 0.220-0.430 mm (0.0086-0.0169 in)
№2,3,4,5: 0.250-0.460 mm (0.0098-0.0181 in)
Second №1,6: 0.170-0.410 mm (0.0066-0.0161 in)
№2,3,4,5: 0.200-0.440 mm (0.0078-0.0173 in)
Oil №1,6: 0.170-0.760 mm (0.0066-0.0299 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-GTE engine has double camshafts (DOHC) and four valves per cylinder (24 valves in total). The 1G-GTE 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)
Valve head diameter:INTAKE
Valve length:INTAKE93.800-94.600 mm (3.6929-3.7244 in)
EXHAUST93.850-94.650 mm (3.6949-3.7264 in)
Valve stem diameter:INTAKE5.960-5.975 mm (0.2346-0.2352 in)
EXHAUST5.955-5.970 mm (0.2344-0.2350 in)
Valve spring free length:43.85 mm (1.7264 in)
Camshaft lobe height:INTAKE35.360-35.460 mm (1.3921-1.3961 in)
EXHAUST35.360-35.460 mm (1.3921-1.3961 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 11.5 kg/cm2 / 300 rpm
Minimun9.0 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 oil10W-30
Oil type APISG or better
Engine oil capacity (Refill capacity) 4.0 liters (4.23 US.qts, 3.52 Imp. qts) or
4.5 liters (4.76 US.qts, 3.96 Imp. qts)
Oil change interval, km (miles)10,000 (6,000)
Ignition system
Spark plug gap0.7-0.8 mm (0.027-0.031 in)
Spark plug torque18 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

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

For 1G-GTE 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 Soarer (Z20)1988-1991
Toyota Mark II (X80)1988-1990
Toyota Supra (A70)1988-1991
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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