The GM LS3 is a 6,162 cc, naturally aspirated V8 petrol engine produced between 2008 and 2017. It features overhead valve (OHV) architecture with two valves per cylinder and a high — flow cylinder head design. In standard form it delivered 304–313 kW (415–426 PS) and 550–570 Nm of torque, providing exhilarating, linear power delivery for performance applications.
Fitted to models such as the Chevrolet Corvette, Camaro SS, and Holden Commodore SS, the LS3 was engineered fo…
Production years 2008–2017 meet U.S. Tier 2 Bin 5 and Euro 4 standards (EPA Certificate of Conformity #A-08-001).
The GM LS3 is a 6,162 cc V8 naturally aspirated petrol engine engineered for performance cars and muscle cars (2008-2017). It combines OHV architecture with a high-flow intake and large-bore design to deliver strong, high-RPM power and exhilarating acceleration. Designed to meet U.S. Tier 2 Bin 5 and Euro 4 standards, it balances raw performance with emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,162 cc | |
Fuel type | Petrol | |
Configuration | V8, OHV, 16-valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 103.25 mm × 92.0 mm | |
Power output | 304–313 kW (415–426 PS) @ 5,900 rpm | |
Torque | 550–570 Nm @ 4,600 rpm | |
Fuel system | Sequential Multi-Port Fuel Injection (SFI) | |
Emissions standard | U.S. Tier 2 Bin 5 / Euro 4 | |
Compression ratio | 10.7:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | dexos1™ (SAE 5W-30) | |
Dry weight | 196 kg |
The GM LS3 was used across GM's Y and Zeta platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-unique engine mounts and accessory drive layouts for the Corvette versus the Camaro-creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The LS3's primary documented service focus is potential valve spring fatigue in high-RPM applications, with elevated incidence in track-driven vehicles. GM internal data from 2010 indicated a subset of engines required spring updates for competition use, while NHTSA data shows no significant safety recalls. High-RPM driving cycles make adherence to the revised service procedure critical.
Analysis derived from GM technical bulletins (2008-2017) and NHTSA recall data (2008-2017). Repair procedures should follow manufacturer guidelines.
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The GM LS3 is renowned for its exceptional reliability and robustness. Its simple OHV design and overbuilt internals make it incredibly durable. The primary consideration is valve spring fatigue in high-RPM applications, addressed by a factory service bulletin. With regular maintenance using dexos1™ oil and premium fuel, it should provide decades of dependable service.
The most common documented issues are valve spring fatigue (in high-RPM use), lifter tick or failure, intake manifold gasket leaks, and water pump failure. These are generally manageable with proper maintenance and are addressed in GM service bulletins.
The LS3 engine was found in the Chevrolet Corvette C6 (2008-2013), Chevrolet Camaro SS (2010-2015), and Holden Commodore SS (2008-2017). It was also offered as a crate engine and is a popular aftermarket swap.
Yes, the LS3 is highly tunable. An ECU remap can yield gains of 20-30 kW. Bolt-on modifications like a performance exhaust, cold air intake, and camshaft can easily push power beyond 370 kW. The engine's robust internals can handle significant power increases with proper tuning.
Fuel economy is typical for a high-performance 6.2L V8. In a Chevrolet Camaro SS, expect around 17.6 L/100km (city) and 11.8 L/100km (highway), or approximately 16 mpg (US) combined. Real-world figures vary significantly based on driving style.
No. The GM LS3 is a non-interference engine. If the timing chain were to fail, the pistons would not contact the open valves, preventing catastrophic internal damage. The engine would simply stop running, requiring a timing chain replacement.
GM mandates the use of dexos1™ full synthetic oil, typically in 5W-30 viscosity. Using the correct specification is critical for the health of the valvetrain and to minimize wear. This is non-negotiable for warranty compliance and engine longevity.
Comprehensive technical documentation and regulatory references
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GM Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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