Daewoo S-TEC engine

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S-TEC
Overview
Manufacturer Daewoo Motors (1998-2000)
General Motors (2000-present)
Suzuki
Also called
  • M-TEC
  • SMARTECH II
Production 1991-present
Combustion chamber
Configuration l3
l4
Cylinder block alloy Cast iron
Cylinder head alloy Aluminum
Valvetrain
Combustion
Fuel type
Oil system Wet sump
Cooling system Water-cooled
Chronology
Successor Small Gasoline Engine

S-TEC or M-TEC is a low-displacement engine range co-developed by Suzuki and Daewoo Motors for use in micro- and subcompact cars.

S-TEC[edit]

The first model was 0.8 L (796 cc) SOHC inline-triple engine based on the powerplant of the Suzuki Alto.

In 2002, the range was extended to 1.0 L and 1.2 L (1150 cc) straight-4 engines and updated with EGR valve to reduce emission. A new engine plant for the updated model T4 was built. The 1.0 version is used in Chevrolet Matiz and the 1.2 in the European Chevrolet Kalos.

In 2004 the 0.8 and 1.0 engines were updated again. New intake and exhaust systems, along with low-friction aluminum cam followers with rollers were added, resulting in better economy.

Displacement Bore Stroke Compression Ratio Power Torque
0.8 L (796 cc) 68.5 mm (2.7 in) 72.0 mm (2.8 in) 36 kW (49 PS; 48 hp) at 6000 rpm 71.5 N·m (52.7 lbf·ft) at 4000 rpm
1.0 L (995 cc) 67.5 mm (2.7 in) 9.3:1 48.5 kW (66 PS; 65 hp) at 5400 rpm 91 N·m (67.1 lbf·ft) at 4200 rpm
1.2 L (1150 cc) 78.0 mm (3.1 in) 53 kW (72 PS; 71 hp) at 5400 rpm 104 N·m (76.7 lbf·ft) at 4400 rpm

Applications:

S-TEC II[edit]

For 2008, a new 1.2 L (1206 cc) version dubbed S-TEC II is introduced with the new Chevrolet Aveo hatchback; new features include chain-driven 16-valve DOHC valvetrain and variable intake geometry. The 1.0 L version has been introduced with the 2010 Chevrolet Spark. A 1.2 L LPG/gasoline version was developed exclusively for the India market; called SMARTECH II and used in the 2010 Chevrolet Beat. Introduced in 2013, the 1.2 L version is available in the United States version of the Chevrolet Spark.

Name Displacement Bore Stroke Compression Ratio Power Torque
1.0 L (996 cc) 68.5 mm 67.5 mm 9.8:1 50 kW (68 PS; 67 hp) at 6400 rpm 93 N·m (68.6 lbf·ft) at 4800 rpm
1.2 L (1206 cc) 69.7 mm (2.7 in) 79 mm (3.1 in) 10.5:1 62 kW (84 PS; 83 hp) at 6000 rpm 114 N·m (84.1 lbf·ft) at 3800-4400 rpm
1.2 L 9.8:1 60 kW (82 PS; 80 hp) at 6400 rpm 111 N·m (81.9 lbf·ft) at 4800 rpm
1.2 L (1199 cc)
  • 80.5 PS (59 kW) at 6200 rpm (Gasoline)
  • 80.04 PS (59 kW) at 6400 rpm (LPG)
  • 108 N·m (80 lb·ft) at 4400 rpm (Gasoline)
  • 104 N·m (77 lb·ft) at 4400 rpm (LPG)
LL0 1.2 L (1249 cc) 70.5 mm (2.8 in) 80.0 mm (3.1 in) 10.5:1 62.66 kW (85 PS; 84 hp) at 6400 rpm 112.05 N·m (82.6 lbf·ft) at 6400 rpm

Applications:

S-TEC III[edit]

Name Displacement Bore Stroke Compression Ratio Power Torque
1.4 L 76 kW (102 hp) at 6000 rpm 131 N·m (97 lbf·ft) at 4200 rpm
1.5 L (1485 cc) 74.71 mm (2.94 in) 84.7 mm (3.33 in) 80 kW (107 hp) at 6000 rpm 142 N·m (105 lb·ft) at 3800 rpm

Applications:

See also[edit]