Toyota G engine

The Toyota Motor Corporation G-family engine is a family of straight-6 piston engines produced from 1979 to 2008. It is notable in that only a single displacement, Template:Convert, was produced in this series. Initially belt-driven OHC non-interference engines (except the VVT-i version which is an interference engine), multivalve DOHC (except the 1G-EU SOHC 12 valve engine) and variable valve timing were added later during the production run. The 1G-GEU was Toyota's first mass produced four-valve twincam engine.<ref name ="twincams">Template:Citation</ref> A prototype version of the 1G-GEU called the LASREα–X, featuring twin-turbos, variable valve timing and intake as well as variable displacement, was fitted to the Toyota FX-1 show car at the 1983 Tokyo Motor Show. It showcased a number of technologies which were later to become commonplace.<ref>All About the Toyota Twin Cam, p. 18</ref> This engine was designed around the new LASRE technology for lighter weight – such as sintered hollow camshafts.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> These engines were used as a lower-displacement alternative to the more upmarket M family and JZ family straight-sixes.

For ten months (in 1967-1968), Toyota also offered Hino's GR100 engine as the "Toyota G" in the shortlived Briska light truck.<ref name=HSamTB>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Template:Anchor G (Hino GR100)

After Toyota's takeover of Hino Motors in 1967, the Briska one-tonne truck was sold with Toyota badging for ten months. The engine code was changed from Hino's "GR100" to "G" for these cars.<ref name=t70000034>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The engine is a 1251 cc watercooled OHV inline-four with distant Renault origins and was originally developed by Hino for their Contessa passenger car. Bore and stroke are Template:Cvt, maximum power Template:Cvt at 5500 rpm. Hino's earlier variants of this engine had a variety of power outputs, ranging from 52 to 65 PS.

Apart from its name, this engine is unrelated to the later series of Toyota G engines.

1G

Since just one displacement was offered, all G-family engines are marked 1G and share the same "square" Template:Convert bore and stroke.

Applications:

• Toyota Soarer
• Toyota Celica Supra
• Toyota Crown
• Toyota Crown Comfort/Crown Sedan
• Toyota Cressida/Mark II/Cresta/Chaser
• Toyota Altezza
• Lexus IS200

1G-E

The export-spec two-valve 1G-E had no emissions controls and were used in commercial vehicles and for a few export markets, mostly southeast Asia. Typical specifications:

• Template:Convert at 5000 rpm, Template:Convert torque at 4000 rpm (Mark II, 1986, Indonesia)
• Template:Convert at 5200 rpm, JDM Crown GS130/131/136V/130G

1G-EU

The Japan-spec 1G-EU was produced from 1979 through 1988. This and the 1G-E are the only two-valve SOHC members of the family. Output was Template:Convert at 5400 rpm and Template:Convert at 4400 rpm.

1G-FE

File:Moteur 1G-FE Lexus IS200 Altezza AS200.jpg

1G-FE

The DOHC 1G-FE uses a narrow valve angle and other fuel economy optimizations. It was introduced in 1988, it features a cast iron block with aluminum cylinder head and uses the slave cam system. Output was Template:Convert at 5,600 rpm and Template:Convert at 4,400 rpm. In 1998 VVT-i was added, which bumped output to Template:Convert at 6,200 rpm and Template:Convert at 4,400 rpm for the Altezza/IS 200. Production of this engine family ceased in 2008 after the discontinuation of the Crown Sedan mild hybrid.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Applications:

• Toyota Altezza/Lexus IS 200
• Toyota Crown
• Aug 2001–Aug 2008 Toyota Crown Sedan GBS12, GXS12
• Toyota Chaser/Mark II/Cresta
• Toyota Mark II Blit
• Toyota Verossa
• Toyota Supra GA70, "G" grade
• Toyota Soarer

1G-GEU

File:Tokyo Motor Show 1981-10.jpg

The 1G-GEU on display at the 1981 Tokyo Motor Show.

The 24-valve DOHC 1G-GEU was intended for high performance and featured a pent-roof combustion chamber.<ref>All About the Toyota Twin Cam, p. 21</ref> Introduced in August 1982 and produced through 1986, mostly for the Japanese market, it was Toyota's first multi-valve twincam engine to make it to the market, and won the "JSME Medal for New Technology" (Japan Society of Mechanical Engineers) in 1982. Output was Template:Convert at 6,200 rpm and Template:Convert at 5,600 rpm. To minimize the downsides of a multi-valve setup, the 1G-GEU was also equipped with T-VIS (Toyota Variable Induction System), increasing low to mid-engine speed torque. Like all following twin cam Toyotas, it used a timing belt rather than chain, for less noise and lower maintenance requirements. In August 1983, the fuel injection system was changed to EFI-D, which measures the pressure in the intake manifold to determine the proper air-fuel mixture.<ref name ="twincams"/><ref>All About the Toyota Twin Cam, p. 20</ref>

Applications:

• Aug 1982–1985 Celica XX GA61
• Aug 1982–1992 Toyota Chaser/Mark II/Cresta
• Aug 1983–1995 Toyota Crown
• Feb 1983–1991 Toyota Soarer

1G-GE

The 1G-GE replaced the 1G-GEU in 1988. It was detuned from Template:Cvt to Template:Cvt and served the same cars as 1G-GEU did. Torque was Template:Cvt at 5600 rpm.<ref name=Catvol36>Template:Citation</ref> It was produced for the Supra GA70 until 1993.

1G-GTE

File:Toyota 1G-GTE GZ20 Soarer.JPG

Toyota 1G-GTE

The 24-valve DOHC 1G-GTE added two CT-12 turbochargers, making it the first twin-turbocharged, twin cam engine of Japanese origin.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> There were three generations of this engine; both air-to-air and air-to-water intercoolers were used, pushing output from Template:Cvt at 6200 rpm and Template:Cvt at 3800 rpm using the air-to-air over the air-to-water. This was the most powerful engine of the G family. In May 1991 it was replaced with the 280 PS 1JZ-GTE on most Toyota cars.

Applications:

• 1986–1992 Supra MK3 (GA70; JDM only)
• 1986–1992 Mark II/Chaser/Cresta (GX71, GX81)
• 1986–1991 Soarer (GZ20)

Template:Anchor 1G-GP/GPE

The 1G-GP and 1G-GPE was an LPG version of the 1G-GE engine. Output is Template:Convert at 5600 rpm and torque is Template:Convert at 2400 rpm.<ref name=CrownComfort-1995-12>{{#invoke:citation/CS1|citation |CitationClass=web }}Template:Dead link</ref>

Applications:

• Toyota Crown Sedan (GS130, GS151)
• Toyota Crown Comfort/Sedan (GXS10)<ref name=CrownComfort-1995-12/>

1G-GZE

The 1G-GZE was a supercharged version produced from 1986 until 1992. Output is Template:Convert at 6,000 rpm and Template:Convert at 3,600 rpm. Like the turbo, it was a 24-valve DOHC 6-cylinder engine but featured a distributorless ignition system (DIS). The 1G-GZE was mated only with automatic gearboxes. In August 1991 it was replaced with the 1JZ-GE on the Mark II/Chaser/Cresta, while serving on the Crown until 1992.

Applications:

• Toyota Crown GS120, GS121, GS131, GS130G (Station Wagon)
• 1988–1990 Toyota Mark II/Chaser/Cresta GX81

See also

• List of Toyota engines