General Motors 122 engine

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "General Motors 122 engine" – news · newspapers · books · scholar · JSTOR (December 2009) (Learn how and when to remove this message)

General Motors 122 engine
Overview
Manufacturer	General Motors
Production	1982–2003
Layout
Configuration	Naturally 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 bore	89 mm (3.5 in)
Piston stroke	74 mm (2.91 in) 80 mm (3.15 in) 88 mm (3.46 in)
Cylinder block material	Cast iron
Cylinder head material	Cast iron (1982–1986) Aluminum (1987–2003)
Valvetrain	OHV 2 valves × cyl.
Compression ratio	9.0:1
Combustion
Fuel system	Rochester carburetor Throttle-body fuel injection Multi-point fuel injection Sequential multi-port FI
Fuel type	Gasoline, E85, LPG
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	83–120 hp (62–89 kW)
Torque output	108–140 lb⋅ft (146–190 N⋅m)
Chronology
Predecessor	GM 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.