GM / Daewoo X20SED

GM X20SEDThe GM X20SED is a 2.0 l (1,998 cc, 121.93 cu-in) straight-four 4-stroke natural aspirated gasoline small-displacement engine from of the GM Family II engines, developed by Holden and used in the Daewoo Nubira and Leganza.

The GM X20SED engine uses a cast-iron engine block with a cast-iron crankshaft and aluminum head with dual overhead camshafts (DOHC) and four valves per cylinder (16 valves in total). This engine is equipped with the Multi-port fuel injection system and a direct ignition system (DIS).

It has an 86.0 mm (3.39 in) cylinder bore and 86.0 mm (3.39 in) piston stroke. Compression ratio rating is 9.6:1. The X20SED engine produces 133 PS (98 kW; 131 HP) of maximum horsepower and 184 Nm (18.77 kg·m; 135.79 ft·lb) of peak torque.

The breakdown of the engine code is as follows:

  • X – Euro 2 engine
  • 20 – 2.0 Liter displacement
  • S – Comression ratio from 9.5 a 10:1
  • E – Multi Point Fuel Injection system
  • D

General information

Engine Specifications
Engine codeX20SED
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline (petrol)
Displacement2.0 L, 1,998 cm3 (121.93 cu in)
Fuel systemMultipoint fuel injection (MFI)
Power adderNone
Power output90 PS (66 kW; 89 HP) at 5,600 rpm
Torque output125 Nm (12.7 kg·m; 92.2 ft·lb)
Firing order1-3-4-2
Dimensions (L x W x H):

Cylinder block

The engine used a cast-iron cylinder block and a cast-iron crankshaft five-bearings supported system. Bore and stroke are 86.0 mm (3.39 in) cylinder bore and 86.0 mm (3.39 in). Compression ratio rating is 9.6:1.

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:9.6:1
Cylinder bore:86.0 mm (3.39 in)
Piston stroke:86.0 mm (3.39 in)
Number of piston rings (compression / oil):2 / 1

Cylinder head

The cylinder head is made of an aluminum alloy. The X20SED engine has chain-driven dual overhead camshafts.

Cylinder head
Cylinder head alloy:Aluminium
Valve Arrangement:DOHC
Valves:16 (4 valves per cylinder)
Valve timing:INTAKE
Valve head diameter:INTAKE32.0 mm (1.1417 in)
EXHAUST29.0 mm (1.2598 in)

Maintenance data

Oil system
Oil consumption , L/1000 km (qt. per miles)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil 5W-30, 5W-40, 10W-30, 10W-40
Oil type API SG / CD
CCMC G4 / G5
Engine oil capacity (Refill capacity)3.8 l (4 US. qt.)
Oil change interval, km (miles)15,000 (9,000)
Ignition system
Spark plugBosch FLR8LDCU

Vehicle applications

ModelYears Produced
Daewoo Nubira (J100, J150)1998–2005
Daewoo Leganza (KLAV)1997-2007
Daewoo Evanda (KLAL)
Chevrolet Vivant 2.0 LS
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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