General Motors 122 engine

General Motors 122 engine
General Motors 122 engine
Overview
Manufacturer	General Motors
Production	1982–2003
Layout
Configuration	Naturally aspirated straight-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. 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.