The K24 is a 2.4-liter inline-four engine configuration, typically featuring double overhead camshafts (DOHC) with i-VTEC variable valve timing and 16 valves in total. In short, it is a lightweight, multi-variant four-cylinder powerplant designed for balance between performance and efficiency.
Launched as part of Honda’s K-series in the early 2000s, the K24 family is widely used across Honda and Acura models. Its core configuration centers on a 2.4 L displacement, an inline-four layout, an aluminum block and head, DOHC with four valves per cylinder, and i-VTEC on most variants. The design relies on a timing chain rather than a belt and emphasizes durability, tunability, and broad torque delivery. While most factory versions are naturally aspirated, the family has seen various tuning approaches and market-specific adjustments over the years.
Core configuration elements
These features define the fundamental layout and mechanical traits of the K24 engines across most variants.
- Inline-4 layout: four cylinders in a straight line, sharing a common crank
- 2.4-liter displacement: roughly 2.4 L capacity across the family
- Aluminum block and cylinder head: light weight and efficient heat management
- Double overhead camshafts (DOHC) with 16 valves: 4 valves per cylinder
- i-VTEC variable valve timing: adjustable cam timing (on the intake and often the exhaust) for broader RPM performance
- Timing chain drive: camshafts driven by a durable chain rather than a belt
- Typically naturally aspirated in stock form: many variants rely on atmospheric intake, with some aftermarket or market-specific boosted versions
In summary, these core elements define how the K24 is built and how it behaves across models and applications.
Variants and usage
The K24 family encompasses several variants that differ in tuning, head design, and market specifications, yet share a common core configuration.
- Subfamilies such as K24A and K24Z: variations in cylinder head revisions, intake flow paths, and other tuning aspects
- Most variants are DOHC with i-VTEC; some early or market-specific versions used non-VTEC
- Head and intake/manifold revisions across variants aim to optimize torque at different RPM ranges
- Aluminum construction is common across variants, supporting packaging in a wide range of Honda/Acura models
- Factory configurations are typically naturally aspirated; turbocharged or heavily boosted setups exist in aftermarket or specialized contexts
Overall, while the K24 family includes several distinct variants, they share a high-level inline-4, 2.4 L, DOHC, 16-valve, i-VTEC configuration that underpins their versatility and reliability.
Performance and maintenance considerations
Because the K24 relies on a chain-driven DOHC design with i-VTEC, routine maintenance—timing chain/guide inspection, oil and water pump health, and consistent oil changes—plays a key role in longevity. The engine’s architecture also supports tuning and upgrades, which has contributed to its popularity among enthusiasts, but any performance-oriented work should respect the variant’s specific compression, cam timing, and airflow characteristics.
Summary
The K24 engine is Honda’s robust 2.4-liter inline-four configuration featuring DOHC, 16 valves, and i-VTEC in most variants. Its aluminum construction, timing chain drive, and adaptable head design have made it a versatile powerplant for a wide range of Honda and Acura models, prized for a balance of reliability, efficiency, and tunable performance.