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General Motors 122 engine information


General Motors 122 engine
Overview
ManufacturerGeneral Motors
Production1982–2003
Layout
ConfigurationNaturally aspirated inline-four engine
Displacement
  • 1.8 L; 112.3 cu in (1,841 cc)
  • 2.0 L; 121.5 cu in (1,991 cc)
  • 2.2 L; 133.6 cu in (2,189 cc)
Cylinder bore89 mm (3.5 in)
Piston stroke
  • 74 mm (2.91 in)
  • 80 mm (3.15 in)
  • 88 mm (3.46 in)
Cylinder block materialCast iron
Cylinder head material
  • Cast iron (1982–1986)
  • Aluminum (1987–2003)
ValvetrainOHV 2 valves × cyl.
Compression ratio9.0:1
Combustion
Fuel systemRochester carburetor
Throttle-body fuel injection
Multi-point fuel injection
Sequential multi-port FI
Fuel typeGasoline, E85, LPG
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output83–120 hp (62–89 kW)
Torque output108–140 lb⋅ft (146–190 N⋅m)
Chronology
PredecessorGM Iron Duke engine
Successor
  • Ecotec engine (Cars)
  • GM Atlas engine (Trucks)

The 122 engine was designed by Chevrolet and was used in a wide array of General Motors vehicles. The 122 was similar to the first two generations of the General Motors 60° V6 engine; sharing cylinder bore diameters and some parts.[citation needed] The 122 was available in the U.S. beginning in 1982 for the GM J platform compact cars and S-series trucks.

For the J-cars, it evolved through 2002 when it was replaced by GM's Ecotec line of DOHC 4-cylinder engines. In the S-10 related models, it evolved through 2003 and was known as the Vortec 2200. Production ceased consistent with the replacement of the S-series trucks with the GMT 355 sub-platform.

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