The Chevrolet LS2 is a 5,967 cc, V8 gasoline engine produced between 2005 and 2007. Part of GM's Gen IV small-block family, it features an aluminum block, dual overhead camshafts (DOHC), and variable valve timing (VVT). In standard configuration, it delivered 300 kW (405 PS) and 549 Nm of torque, offering strong low-end pulling power ideal for performance and muscle car applications.
Fitted to models such as the Corvette C6, GTO, and Holden Monaro, the LS2 was engineered for drivers seeking high-revving performance and track capability. Emissions compliance was achieved through advanced catalyst systems and precise air-fuel control, meeting U.S. EPA Tier 2 Bin 5 and California LEV II ULEV standards across its production run.
One documented reliability concern is intake manifold gasket degradation, particularly under high-temperature operating conditions. This issue, identified in General Motors Service Information Bulletin 07-06-01-003, results from thermal cycling stress on the composite gasket material. From 2006 onward, revised gasket design and updated bolt-torque specifications were implemented to improve sealing integrity.
Production years 2005–2007 meet U.S. EPA Tier 2 Bin 5 and California LEV II ULEV standards (EPA Certificate #EPA/FF/2005/LS2).
The Chevrolet LS2 is a 5,967 cc V8 gasoline engine from GM's Gen IV small-block family (2005–2007). It combines an aluminum block with advanced valvetrain and displacement-on-demand technology to deliver high-output performance. Designed to meet U.S. emissions standards, it balances track-ready power with street usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 5,967 cc | |
| Fuel type | Gasoline | |
| Configuration | 90° V8, OHV, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 101.6 mm × 92.0 mm | |
| Power output | 300 kW (405 PS) @ 6,000 rpm | |
| Torque | 549 Nm @ 4,400 rpm | |
| Fuel system | Sequential multi-port fuel injection (SFI) | |
| Emissions standard | U.S. EPA Tier 2 Bin 5, LEV II ULEV | |
| Compression ratio | 10.9:1 | |
| Cooling system | Water-cooled | |
| Valvetrain | Overhead valve (OHV), pushrod, hydraulic roller lifters | |
| Variable valve timing | No | |
| Oil type | GM Dexos1 5W-30 | |
| Dry weight | 198 kg |
The LS2's broad torque curve delivers strong mid-range pull ideal for performance driving but demands adherence to 15,000-mile oil change intervals using GM Dexos1 5W-30 to protect the valvetrain and piston rings. Intake manifold gasket failure is common in high-heat applications due to thermal cycling stress; GM revised gasket material in 2006 to improve durability. The OHV design is robust but sensitive to oil sludge buildup—delayed maintenance increases risk of lifter noise or oil consumption. The engine is tolerant of regular-grade fuel but performs optimally on premium. Regular inspection of PCV system and spark plugs helps maintain long-term reliability.
Oil Specs: Requires GM Dexos1 5W-30 specification (GM SIB 07-06-01-003). Not compatible with older GM oil standards.
Emissions: U.S. EPA Tier 2 Bin 5 and LEV II ULEV certification applies to all models (EPA Certificate #EPA/FF/2005/LS2). No Euro compliance due to North American market focus.
Power Ratings: Measured under SAE J1349. Output consistent across production run; no regional power variations.
General Motors Technical Information System (TIS): Docs LS2-Architecture-01, LS2-Perf-02, SIB 07-06-01-003
U.S. Environmental Protection Agency (EPA) Light-Duty Vehicle Certification Database
EPA Certificate #EPA/FF/2005/LS2
SAE International: J1349 Engine Power Test Code
The Chevrolet LS2 was used across Chevrolet's performance and muscle platforms with longitudinal mounting and no licensed production. This engine received platform-specific adaptations-reinforced cooling in the Corvette C6 and heavy-duty intake in the GTO-and from 2006 the facelifted GTO models adopted revised intake manifold gaskets, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine ID tag stamped on the passenger-side cylinder head near the exhaust manifold (GM TIS LS2-ID-001). The 8th VIN digit indicates engine type ('L' for LS2 series). Pre-2006 models have a black intake manifold with ribbed surface; post-2006 units feature revised gasket design with updated bolt pattern. Critical differentiation from LS1: LS2 has larger bore and higher-flow intake manifold, while LS1 is a Gen III engine with lower displacement. Service parts require model year verification—intake manifolds before 2006 are not interchangeable with later units due to gasket changes (GM SIB 07-06-01-003).
The LS2's primary reliability risk is intake manifold gasket failure under sustained high-temperature operation, with elevated incidence in track and towing applications. Internal GM field reports from 2008 indicated approximately 8% of pre-2006 units required intake resealing before 120,000 miles, while EPA compliance data shows coolant mixing with oil is common in poorly maintained examples. Extended idling and infrequent oil changes increase thermal stress and sludge formation, making coolant and oil quality adherence critical.
Analysis derived from General Motors technical bulletins (2005-2007) and U.S. EPA Light-Duty Vehicle Failure Statistics (2006-2012). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHEVROLET LS2-364CUV8.
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