GM 2.0 Liter Turbocharged Ecotec I4 LNF Engine

The LNF is a 2.0-liter, four-cylinder engine was designed and manufactured by General Motors for use in various vehicles, including two-seater sports coupes, compact sedans, and was also utilized by non-GM vehicles, such as the Fisker Karma.

2.0L LNF Engine Vitals
Displacement:	2.0L / 124 cu. in.
Aspiration:	Forced Induction (Turbocharger)
Vehicles:	Chevrolet Cobalt SS, HHR SS, Daewoo G2X Turbo, Opel GT, Pontiac Solstice GXP, Saturn Sky Red Line
Introduced:	2006 Model Year
Discontinued:	2010 Model Year (GM Vehicle Production)
Predecessor:	LK9 (B207)
Successor:	LDK
Assembly:	Spring Hill, Tennesse

Overview

The turbocharged 2.0-liter LNF engine is a member of the second-generation of the Ecotec engine family, which traces its roots to four-cylinders designed by Opel and Saab. Its line of successors includes the 2.0-liter LTG I4 and 2.0-liter LSY I4, which are both utilized by vehicles currently in production.

Notably, the LNF had an output rating of 260 horsepower and 260 pound-feet of torque in every GM vehicle application that utilized it. The positive crankcase ventilation (PCV) system was not quite as refined as it is in newer turbo-four applications, as such, oil buildup was an issue for the LNF, particularly clogged valves, which were also a bi-product of the direct-injection architecture.

Specifications

GM 2.0L I4 LNF Engine Specs
Engine family:	Ecotec
GM RPO code:	LNF
Displacement:	2.0 Liters
Configuration & Cylinders:	I-4
Vehicle Engine Orientation:	Longitudinal or Transverse
Aspiration:	Turbocharged
Compression ratio:	9.2:1
Valve configuration:	Overhead Valve (OHV)
Valves per cylinder:	2
Assembly site:	GM Tonawanda plant, New York, USA
Valve lifters:	2
Firing order:	1 – 8 – 7 – 2 – 6 – 5 – 4 – 3
Bore x stroke:	4.065 x 3.622-inches (103.25 x 92 mm)
Fuel system:	SIDI (Spark Ignited Direct Injection)
Fuel Type:	Premium Fuel
Maximum Engine Speed:	6,000 RPM
Materials
Block:	Cast Aluminum
Cylinder head:	Cast Aluminum
Main bearing caps:	Iron
Crankshaft:	Forged Steel
Camshaft:	Billet Steel
Connecting rods:	Forged Steel
Emissions Controls
Catalytic Converter
Positive Crankcase Ventilation

Vehicle Applications

GM 2.0L I4 Ecotect Engine Vehicle Applications
Year	Vehicle	Transmission	Power (hp / kW @ RPM)	Torque (lb-ft / Nm @ RPM)
2008-2010	Chevrolet Cobalt SS	5-Speed Manual (F35) or 4-Speed Auto (4T45E)	260 / 194 @ 5300	260 / 353 @ 2000
2008-2010	Chevrolet HHR SS	5-Speed Manual (F35)	260 / 194 @ 5300	260 / 353 @ 2000
2006-2009	Daewoo G2X Turbo	5-Speed Manual (AR5) or 5-Speed Auto (5L40-E)	260 / 194 @ 5300	260 / 353 @ 2000
2009	Elfin T5	5-Speed Manual	264 / 197 @ 5300	259 / 351 @ 2000
2012 Fisker	Karma	1-Speed Auto (Hybrid)	260 / 194 @ 5300	260 / 353 @ 2000
2006-2009	Opel GT	5-Speed Manual (AR5) or 5-Speed Auto (5L40-E)	260 / 194 @ 5300	260 / 353 @ 2000
2006-2009	Pontiac Solstice GXP	5-Speed Manual (AR5) or 5-Speed Auto (5L40-E)	260 / 194 @ 5300	260 / 353 @ 2000
2006-2009	Saturn Sky Red Line	5-Speed Manual (AR5) or 5-Speed Auto (5L40-E)	260 / 194 @ 5300	260 / 353 @ 2000

Related Engines

As mentioned, the LNF is a member of the second-gen Ecotec engine family, which also includes the following (note: 2.2 and 2.4-liter engines are also a part of the four-cylinder Ecotec family):

2.0-Liters: