Engine Toyota 1G

Toyota G series engines are 6-cylinder inline engines. The engines of this series were produced from 1979 to 2006. All engines have the same displacement of 2 liters (1988 cc). The drive of the gas distribution system of all engines of the series was carried out using a timing belt.

  • 1G-EU (1979 – 1988) – the first version of 1G, which appeared on the Toyota Crown, had a compression ratio of 8.8, power 125 hp at 5400 rpm, torque 160 Nm at 4400 rpm. Since 1983, a version has been produced with a compression ratio increased to 9.2 and a power of 130 hp. From 1986, power was reduced to 105 hp at 5400 rpm, torque 146 Nm at 4400 rpm.

    These engines were installed on Toyota Chaser X60, Cresta X50/X60/X70, Crown S110, Mark 2 X60, Soarer Z10/Z20.

  • 1G-GEU (1983 – 1988) – 1G-EU version with Yamaha 24 valve cylinder head and T-VIS variable geometry intake manifold. Due to these modifications, engine power increased to 160 hp at 6400 rpm, torque 186 Nm at 5200 rpm. Since 1985, the power of the 1G-GEU has been set at around 140 hp.

    The engine was installed on the following cars: Toyota Chaser X70, Mark 2 X60/X70, Cresta X60/X70, Crown S120, Soarer Z10/Z20, Toyota Supra A70.

  • 1G-GTEU (1986 – 1988) – turbo version of 1G-GEU, compression ratio reduced to 8.5, two CT12 turbochargers installed. At 0.5 bar, the 1G-GTEU produced 185 hp at 6200 rpm and 245 Nm of torque at 3200 rpm.

    Installed on: Toyota Chaser X70, Mark 2 X70, Cresta X70, Soarer Z20, Toyota Supra A70.

  • 1G-GZEU / GZE (1986 – 1992) – compressor version of 1G-GEU, where the SC-14 compressor was used instead of turbines. At the same time, electronic ignition was used, another piston group for a compression ratio of 8. The power of such a power unit is 160 hp at 6000 rpm, a torque of 210 Nm at 4000 rpm. In 1989, the engine was upgraded and the name changed to 1G-GZE. Boost pressure 0.5 bar, power 170 hp at 6000 rpm, torque 230 Nm at 3600 rpm.

    Installed on: Toyota Chaser X80, Mark 2 X80, Cresta X80, Crown S130 and Soarer Z20.

  • 1G-GE (1988 – 1993) – upgraded 1G-GEU, mass air flow sensor replaced with an absolute pressure sensor, power reduced to 150 hp at 6200 rpm, torque 186 Nm at 5400 rpm.

    1G-GE installed on: Toyota Chaser X80, Mark 2 X80, Cresta X80, Crown S130, Soarer Z20, Supra A70.

  • 1G-GTE (1988 – 1991) – upgraded 1G-GTEU, reinforced crankshaft, changed intake, intercooler, 315 cc injectors, ECU. Boost pressure increased to 0.75 bar. Engine power 210 hp at 6200 rpm, torque 275 Nm at 3800 rpm.

    There are such motors on the same cars as the 1G-GE, except for the Toyota Crown.

  • 1G-FE (1988 – 2005) – version of 1G-GEU with a different narrow 24 valve cylinder head, designed to replace 1G-EU. Power 135 hp at 5600 rpm, torque 176 Nm at 4400 rpm. Installed on: Toyota Mark 2 X90, Cresta X80/X90, Crown S140, Soarer Z20.

    Since 1996, there has been a restyling and power has grown to 140 hp at 5750 rpm, a torque of 185 Nm at 4400 rpm. Cars with this engine: Toyota Chaser X100, Mark 2 X100, Cresta X100, Crown S150.

    In 1998, 1G-FE underwent more serious changes and received the BEAMS prefix. Of the innovations, 1G received a new connecting rod and piston group, a variable valve timing system on the intake shaft, an ACIS variable geometry intake manifold, an electronic throttle valve, the ignition system has undergone changes, and the exhaust manifold has been finalized. There are no hydraulic lifters on the 1G-FE, so the clearances must be checked every 20 thousand km.

    Brief characteristics of 1G BEAMS: the compression ratio has increased to 10, the power is now 160 hp at 6200 rpm, the torque is 200 Nm at 4400 rpm. Installed 1G-FE BEAMS on: Toyota Mark 2 X100/X110, Chaser X100, Crown S150/S170, Verossa, Altezza, Lexus IS 200.


Manufacturer Shimoyama plant
Production years 1979-2006
Cylinder block alloy cast iron
Fuel system injector
Configuration inline
Number of cylinders 6
Valves per cylinder 2/4
Piston stroke, mm 75
Cylinder bore, mm 75
Displacement, cc 1988
Fuel type petrol
Euro standards up to Euro 3
Weight, kg 180 (1G-EU, 1G-FE)
190 (1G-GE, 1G-GEU)
215 (1G-GTE, 1G-GTEU)
200 (1G-GZE, 1G-GZEU)
Fuel consumption, L/100 km
— city
— highway
— combined
Oil consumption, gr/1000 km up to 1000
Recommended engine oil 0W-30 / 5W-30 / 5W-40 / 10W-30 / 10W-40 / 10W-50 / 15W-50
Engine oil capacity, liter 4.2
Oil change interval, km 7000-10000
Engine lifespan, km from 300,000 to 400,000 depending on modification

Frequent problems

  1. Fast consumption of engine oil. The reason lies in the sinking of the oil scraper rings, which is very typical for a high-mileage engine. De-carbonization or repair with replacement of piston rings, liners, valve stem seals, oil seals and other parts of the entire set will help.
  2. Oil leak. Occurs due to wear of the pressure sensor. You need to buy and install a new one.
  3. Oil pressure instability. The problem is with the sensor itself. The pressure needs to be measured and the sensor replaced.
  4. Change of turns. It is necessary to check the idle valve, throttle valve and throttle position sensor. If you reinstall the last two, there is a chance that they will not be installed correctly.

Even on turbocharged engine modifications, turbochargers do not differ in their long service life. They need to be changed after one hundred thousand kilometers. Also installed is not a very good drive for the oil pump. In general, an engine requires good oil. On modifications of “Beams”, when the timing belt breaks, the valves bend. In general, the motors are good, but time makes itself felt – even the latest FE-models are already quite old and worn out.

1 thought on “Engine Toyota 1G”

  1. Alick Siwale

    I have a 1G Engine 2000 beam which developed low oil pressure when i just bought it as second hand car.I experienced a little bit of knocking sound and we opened it.Replaced main,con rod bearings,rings,valve seals and the cylinder was serviced.when we started it the knocking sound continued what’s the advise.

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