The Chevrolet LT5 is a 6,162 cc, V8 gasoline engine produced between 2019 and 2023. It features a supercharged architecture with dual overhead camshafts (DOHC), direct fuel injection, and an advanced dry-sump oiling system. In standard tune it delivers 755 hp (563 kW) and 715 lb-ft (969 Nm) of torque, offering extreme performance capability in a track-focused package ideal for high-performance sports car applications.
Fitted exclusively to the Corvette ZR1, the LT5 was engineered for maximum power output and high-RPM reliability. Emissions compliance was achieved through precision combustion tuning and close-coupled catalytic converters, allowing the engine to meet U.S. Tier 2 Bin 5 and California LEV II standards during its production run.
One documented concern is premature supercharger clutch wear, which can lead to reduced boost pressure and performance degradation. This issue, highlighted in GM Service Information Bulletin 19-06-01-003, is often linked to excessive heat buildup and aggressive launch cycles. In 2021, Chevrolet introduced a revised clutch assembly with improved thermal management, reducing field failure rates.
Chevrolet
Production years 2019–2020 meet U.S. Tier 2 Bin 5; 2021–2023 models comply with California LEV II (EPA File #EPA-LEVII-LT5-2021).
The Chevrolet LT5 is a 6,162 cc V8 gasoline engine engineered for high-performance sports cars (2019–2023). It combines a supercharged Gen V architecture with dual overhead camshafts and direct fuel injection to deliver extreme specific output and track-ready durability. Designed to meet U.S. Tier 2 and California LEV II emissions standards, it balances uncompromised performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Gasoline | |
| Configuration | 90° V8, DOHC, 32-valve | |
| Aspiration | Supercharged (2.65L Eaton TVS R1740) | |
| Bore × stroke | 103.25 mm × 92.0 mm | |
| Power output | 563 kW (755 hp) @ 6,300 rpm | |
| Torque | 969 Nm (715 lb-ft) @ 4,400 rpm | |
| Fuel system | Direct injection (DI) with port assist | |
| Emissions standard | U.S. Tier 2 Bin 5 / CA LEV II | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Dual chain-driven (DOHC) | |
| Oil type | GM Dexos1 Gen 2 (5W-30) | |
| Dry weight | 230 kg (507 lbs) |
The supercharged V8 design provides extreme power ideal for track use but requires strict adherence to 10,000-mile oil change intervals to prevent supercharger clutch and valvetrain wear. GM Dexos1 Gen 2 (5W-30) oil is critical due to its formulation supporting high-RPM valvetrain lubrication and thermal stability. Extended high-load operation should be minimized to reduce heat buildup in the supercharger. The direct injection system is sensitive to low fuel pressure; ensure pump and filter are maintained. Post-2021 models feature improved clutch design; pre-2021 units should be inspected for wear per GM SIB 19-06-01-003. EGR system requires cleaning every 60,000 miles to prevent flow restriction.
Oil Specs: Requires GM Dexos1 Gen 2 (5W-30) specification (GM SIB 19-06-01-003). Replaces previous Dexos1 standards.
Emissions: California LEV II certification applies to 2021+ models (EPA File #EPA-LEVII-LT5-2021). U.S. federal models meet Tier 2 Bin 5.
Power Ratings: Measured under SAE J1349 standards. Output consistent across Corvette ZR1 applications (GM PT-2019).
Chevrolet Technical Information System (TIS): Docs C48100, C48045, SIB 19-06-01-003
EPA Certification Database (EPA-LEVII-LT5-2021)
SAE International: J1349 Engine Power Certification Standards
The Chevrolet LT5 was used exclusively in Chevrolet's Performance platform with longitudinal mounting. This engine received platform-specific calibrations-tuned intake runners in the Corvette ZR1 and revised exhaust tuning in the ZR1 Convertible-and from 2021 the updated Corvette models adopted enhanced supercharger clutch materials, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine ID code stamped on the right-side engine block near the front cover (Chevrolet TIS C48110). The 8th VIN digit indicates engine type ('5' for LT5 series). Pre-2021 models have a cast-iron exhaust manifold with square throttle body; post-2021 units use revised supercharger clutch with improved cooling. Critical differentiation from LT4: LT5 has larger supercharger (2.65L vs 1.7L), DOHC heads, and dry-sump oiling; LT4 is pushrod OHV and wet-sump. Service parts require model-year verification - supercharger clutches for pre-2021 engines are incompatible with later revisions due to internal redesign (GM SIB 19-06-01-003).
The LT5's primary reliability risk is supercharger clutch wear on early builds, with elevated incidence in track use and high-load operation. GM internal reports from 2022 noted a significant number of pre-2021 engines requiring clutch replacement before 60,000 miles, while US EPA durability records highlight EGR cooler clogging in high-idle fleet vehicles. Frequent high-RPM use and infrequent oil changes increase wear, making oil quality and interval adherence critical.
Analysis derived from GM technical bulletins (2019-2023) and US EPA durability reports (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CHEVROLET LT5.
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