GM / Daewoo X20SED

The 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 code	X20SED
Layout	Four stroke, Inline-4 (Straight-4)
Fuel type	Gasoline (petrol)
Production	–
Displacement	2.0 L, 1,998 cm3 (121.93 cu in)
Fuel system	Multipoint fuel injection (MFI)
Power adder	None
Power output	90 PS (66 kW; 89 HP) at 5,600 rpm
Torque output	125 Nm (12.7 kg·m; 92.2 ft·lb)
Firing order	1-3-4-2
Dimensions (L x W x H):	–
Weight	–

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 alloy		Cast-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	–
	EXHAUST	–
Valve head diameter:	INTAKE	32.0 mm (1.1417 in)
	EXHAUST	29.0 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 plug	Bosch FLR8LDCU

Vehicle applications

Model	Years Produced
Daewoo Nubira (J100, J150)	1998–2005
Daewoo Leganza (KLAV)	1997-2007
Daewoo Evanda (KLAL)	–
Chevrolet Vivant 2.0 LS	–