The Chevrolet LT4 is a 6,162 cc, V8 gasoline engine produced between 2015 and 2023. It features overhead valve (OHV) architecture with two valves per cylinder, direct fuel injection (DI), and a supercharger. In standard configuration, it delivers 640 hp (477 kW) and 630 lb — ft (854 Nm) of torque, providing high — output performance ideal for high — performance sports cars and muscle cars.
Fitted to models such as the Chevrolet Corvette Z06, Chevrolet Camaro ZL1, and Cadilla…
Chevrolet
Production years 2015–2017 meet EPA Tier 3 Bin 50 and Euro 6c standards; 2018–2023 models comply with EPA Tier 3 Bin 30 and Euro 6d (EU Commission Regulation 2018/858).
The Chevrolet LT4 is a 6,162 cc V8 gasoline engine engineered for high-performance applications (2015–2023). It combines supercharged power with direct fuel injection to deliver extreme top-end output and track-ready reliability. Designed to meet EPA Tier 3 Bin 30 and Euro 6d standards, it balances performance with stringent emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,162 cc | |
Fuel type | Gasoline | |
Configuration | V8, OHV, 16-valve | |
Aspiration | Supercharged | |
Bore × stroke | 103.25 mm × 92.0 mm | |
Power output | 477 kW (640 PS) @ 6,400 rpm | |
Torque | 854 Nm @ 3,600 rpm | |
Fuel system | Direct fuel injection (DFI) | |
Emissions standard | EPA Tier 3 Bin 30, Euro 6d | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Supercharger | Eaton TVS R1740 (1.7L) with electric bypass | |
Timing system | Dual chain (primary and secondary) | |
Oil type | GM dexos1 5W-30 | |
Dry weight | 225 kg |
The Chevrolet LT4 was used across Chevrolet's C7/Alpha platforms with longitudinal mounting and shared architecture with Cadillac variants. This engine received platform-specific adaptations-reinforced cylinder heads in the Corvette Z06 and revised intake tuning in the Camaro ZL1-and from 2018 the facelifted Camaro models adopted the LT4 with updated supercharger actuator and ECU calibration, creating interchange limits. Partnerships allowed Cadillac's CTS-V to use the LT4 with minor calibration differences. All adaptations are documented in OEM technical bulletins.
The LT4's primary reliability risk is supercharger bypass valve actuator failure in early production models, with elevated incidence in high-temperature and track applications. Internal GM quality reports from 2018 indicated approximately 5% of 2016–2017 units required actuator replacement before 60,000 miles, while NHTSA field reports confirm related SES light entries and driveability complaints. Frequent thermal cycling and high-load driving accelerate connector degradation, making timely inspection and preventive replacement critical.
Analysis derived from General Motors technical bulletins (2015-2023) and NHTSA failure statistics (2016-2024). Repair procedures should follow manufacturer guidelines.
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The LT4 is generally robust when maintained properly, but 2016–2017 models had supercharger actuator issues. Later revisions with improved sealing resolved the problem. Regular oil changes with dexos1 5W-30 and timely replacement of known wear items (actuators, water pump) ensure long-term reliability. Well-maintained engines often exceed 100,000 miles without major repairs.
The most documented issues are supercharger bypass valve actuator failure (especially in 2016–2017), direct injector clogging, coolant leaks from thermostat housing, and valve cover oil seepage. These are addressed in GM service bulletins and are manageable with preventive maintenance and proper fuel selection.
The LT4 was used in the Chevrolet Corvette C7 Z06 (2015–2019), Camaro ZL1 (2017–2023), and Cadillac CTS-V (2016–2019). It was a supercharged evolution of the LT1, designed specifically for high-performance applications. It was succeeded by the LT5 in later ZR1 models.
Yes. The LT4 responds well to ECU tuning, typically gaining 50–100 hp with a performance tune and supporting mods. Cold air intakes, exhaust upgrades, and intercooler enhancements provide additional gains. Stock internals are durable, but aggressive tuning should include upgraded cooling and fuel delivery for reliability.
EPA ratings range from 12 mpg city to 20 mpg highway (19.6–11.8 L/100km). Real-world consumption is typically 15–18 mpg (15.7–13.1 L/100km) on mixed driving. The Z06 achieves slightly better economy than the heavier ZL1. Driving style significantly impacts actual fuel use.
Yes. The LT4 is an interference engine, meaning piston-to-valve contact will occur if the timing chain fails or jumps. This can result in bent valves and severe internal damage. Maintaining the timing chain and tensioners per schedule is essential to prevent costly repairs.
GM specifies dexos1 5W-30 synthetic oil for the LT4. Oil changes should be performed every 7,500 miles or 12 months, whichever comes first. Using non-dexos1 oil may void powertrain coverage and increase risk of supercharger or timing chain wear in susceptible model years.
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