Overview & Design Features
The Acura K24V7 is a 2.4-liter (2356 cc) inline four-cylinder engine, part of Acura’s renowned K-series family, manufactured by Honda Motor Co., Ltd. Introduced in the mid-2010s, this specific variant represents a significant evolution, integrating Honda’s “Earth Dreams Technology” for enhanced efficiency and performance. Its deployment marked a strategic move towards more refined and fuel-efficient powertrains in Acura’s entry-level luxury models, building upon the K-series’ legacy of reliability and tunability.
Engineering features of the K24V7 include an all-aluminum cylinder block and cylinder head, contributing to its lightweight design. Fuel delivery is managed by a sophisticated direct injection (DI) system, known as PGM-FI, which precisely atomizes fuel directly into the combustion chambers, optimizing combustion efficiency. The engine utilizes Honda’s advanced i-VTEC (intelligent Variable Valve Timing and Lift Electronic Control) system, which continuously adjusts valve timing on both intake and exhaust camshafts, and variably controls intake valve lift, to maximize power output across the RPM range while simultaneously improving fuel economy and reducing emissions.
This iteration of the K24 engine was primarily deployed in the 2015-2020 Acura TLX 2.4L (FWD) models in North America. It served as the base engine for the sedan, providing a balanced combination of power and efficiency for the luxury compact segment.
Technical Specifications
| Displacement (cc) | 2356 |
| Max Power (hp (kW) @ RPM) | 206 hp (153 kW) @ 6800 RPM |
| Max Torque (Nm (kg*m) @ RPM) | 247 Nm (25.2 kg*m) @ 4500 RPM |
| Fuel Type | Premium Unleaded (91+ RON recommended) |
| Fuel Consumption (l/100 km) | ~8.1 (combined, varies by vehicle/driving conditions) |
| Engine Type | Inline 4-cylinder, DOHC, i-VTEC, Direct Injection (Earth Dreams Technology) |
| Compression Ratio | 11.1:1 |
| Cylinder Bore (mm) | 87 |
| Piston Stroke (mm) | 99 |
| Valvetrain | DOHC 16-valve, Chain-driven |
| Valves per Cylinder | 4 |
| Additional Info | Aluminum alloy block and head, Drive-by-Wire throttle, Multi-point fuel injection (supplemented by DI) |
Common Problems & Reliability
The K24V7 generally upholds the K-series reputation for robustness. However, as a direct-injected engine, it is susceptible to carbon buildup on intake valves over prolonged use. This accumulation, resulting from the absence of fuel washing the back of the valves, can lead to reduced airflow, decreased performance, and potential misfires. While not a universal issue, it requires monitoring and potential preventative cleaning. Another less common concern observed in some high-mileage units can be slightly elevated oil consumption, although this is typically within acceptable limits for a well-maintained engine. The Variable Timing Control (VTC) actuator, a known weak point in some earlier K-series designs, is generally more robust in the K24V7, but noisy cold starts could indicate a developing issue. With diligent maintenance, the K24V7 engine can reliably achieve a service life exceeding 320,000 kilometers (200,000 miles) before requiring a major overhaul.
Maintenance Tips & Service Schedule
Proactive maintenance is crucial for the K24V7’s longevity. Engine oil changes using a high-quality synthetic 0W-20 viscosity are recommended every 12,000-16,000 kilometers (7,500-10,000 miles) or as indicated by the vehicle’s Maintenance Minder system. This includes replacing the oil filter with each change. Spark plugs, typically iridium-tipped, should be replaced approximately every 160,000 kilometers (100,000 miles). The timing chain is designed to last the engine’s lifespan, but inspection at high mileage (e.g., 240,000 km / 150,000 miles) is prudent. Coolant flushes with Honda Type 2 blue coolant are advised every 190,000 kilometers (120,000 miles). Regular valve clearance inspection, typically every 160,000 kilometers, is also recommended to ensure optimal engine operation.
Conclusion
The Acura K24V7 engine stands as a reliable and efficient choice for a used vehicle buyer. Its integration of Earth Dreams Technology with the proven K-series architecture provides a strong balance of performance, fuel economy, and long-term durability. Provided the vehicle has a documented history of proper maintenance, including attention to potential carbon buildup, this engine represents a sound investment for those seeking a dependable and engaging powertrain.