Toyota G engine
|Manufacturer||Toyota Motor Corporation|
The Toyota Motor Corporation G-family engine is a family of straight-6 piston engines produced from 1979 to present. It is notable in that only a single displacement, 2.0 L (1988 cc), was produced in this series. All were belt-driven OHC non-interference engines (except the VVT-i version in the IS200 which is an interference engine), with multivalve DOHC (except the 1G-EU SOHC 12 valve engine) and even variable valve timing added later.
Since just one displacement was offered, all G-family engines are marked 1G and share the same "square" 75 mm (2.95 in) bore and stroke.
The Japan-spec 1G-EU was produced from 1979 through 1986. This is the only 2-valve SOHC member of the family. Output was 105-125 hp (78-93 kW) at 5400 rpm and 116-127 ft·lbf (157-172 Nm) at 4400 rpm.
The DOHC 1G-FE uses a narrow valve angle and other fuel economy optimizations. It was introduced in 1988. Output was 135 hp (101 kW) at 5600 rpm and 130 ft·lbf (176 Nm) at 4400 rpm. In 1998 VVT-i was added, which bumped output to 160 hp (119 kW) at 6200 rpm and 148 ft·lbf (200 Nm) at 4400 rpm for the Toyota Altezza/Lexus IS 200, Toyota Crown, Toyota Chaser, Toyota Mark II, and Toyota Cresta.
The 24-valve DOHC 1G-GEU was intended for high performance. Produced from 1982 through 1986, mostly for the Japan market, output was 140-160 hp (104-119 kW) at 6200 rpm and 120-134 ft·lbf (162-181 Nm) at 5600 rpm.
1G-GE replaced 1G-GEU in 1988. It was detuned from 160 hp down to 150 hp and served the same cars as 1G-GEU did. It was produced for Supra GA70 until 1993.
The 24-valve DOHC 1G-GTE added two CT-12 turbochargers to the versatile motor. There were 3 generations of this engine both air-to-air and air-to-water intercoolers were used, pushing output from 185 to 210 hp (138 to 157 kW) at 6200 rpm and 173 to 203 ft·lbf (234 to 275 Nm) at 3800 rpm using the air-to-air over the air-to-water. This was the most powerful engine of the whole G family. In 1991.5 it was replaced with >280 hp 1JZ-GTE on most Toyota cars.
- 1986–1991 Toyota Supra MK3 (chassis code GA70, JDM only)
- 1988–1991 Mark II/Chaser/Cresta (chassis code GX81)
- 1986–1991 Toyota Soarer (chassis code GZ20)
The 1G-GZE was a supercharged version produced from 1986 till 1992. Output was 168 hp (125 kW) at 6000 rpm and 167 ft·lbf (226 Nm) at 3600 rpm. Like the turbo, it was a 24-valve DOHC engine but featured a distributorless ignition system (DIS). 1G-GZE was mated only with automatic gearboxes. In August 1991.5 it was replaced with 1JZ-GE on Mark II/Chaser/Cresta, while serving on Crown until 1992.
- Toyota Crown GS120, GS130
- 1988–1990 Toyota Mark II/Chaser/Cresta GX81