The Honda K24A2 engine is a 2.4-liter inline-four cylinder engine produced by Honda Motor Company. It was first introduced in the 2004 Acura TSX and has since been used in a variety of Honda vehicles.
This engine is known for its impressive balance of power and efficiency, making it a popular choice among automotive enthusiasts and everyday drivers alike.
The purpose of this blog post is to provide a comprehensive overview of the Honda K24A2 engine from K24 engine family, including its specs, performance, and key features.
We’ll take a closer look at the engine’s compression ratio, horsepower and torque ratings, RPM limits, and more. Additionally, we’ll provide a performance review of the engine, exploring its power delivery, engine response, reliability, and more.
Honda K24A2 Engine Overview
The Honda K24A2 engine is a 2.4-liter, four-cylinder engine that was introduced in the 2004 Acura TSX.
This engine was designed to deliver a balance of power and efficiency, and it has since been used in several Honda vehicles, including the CR-V, Civic Si, and Element.
One of the key features of the K24A2 engine is its high compression ratio of 10.5:1, which allows for improved engine efficiency and more power.
The engine produces 197 horsepower at 6,800 RPM and 166 lb-ft of torque at 4,500 RPM in the 2004-2005 Acura TSX models.
In the 2006-2008 models, horsepower was increased to 205 at 7,000 RPM, while torque remained the same at 166 lb-ft at 4,500 RPM.
The K24A2 engine also has a high RPM limit, with a redline of 7,200 RPM. This high RPM limit allows the engine to rev quickly and produce maximum power, making it an ideal choice for sports cars and high-performance vehicles.
One of the notable things about the K24A2 engine is its reliability and durability. It is designed with a robust construction that is built to last, and it is known for its smooth operation and low maintenance requirements.
Additionally, the engine is fuel efficient, providing a good balance between power and fuel efficiency, making it a popular choice among car enthusiasts and everyday drivers alike.
Overall, the Honda K24A2 engine is a versatile and reliable engine that provides a balance of power and efficiency. Its high compression ratio, high RPM limit, and balanced design make it an excellent choice for a variety of vehicles and driving styles.
Specification Table for K24A2 Engine
| Specification | 2004-2005 Acura TSX | 2006-2008 Acura TSX |
|---|---|---|
| Compression Ratio | 10.5:1 | 10.5:1 |
| Horsepower | 197 hp @ 6,800 RPM | 205 hp @ 7,000 RPM |
| Torque | 166 lb-ft @ 4,500 RPM | 166 lb-ft @ 4,500 RPM |
| Redline | 7,200 RPM | 7,200 RPM |
| Rev Limit | 7,100 RPM | 7,100 RPM |
| Engine Code | RBB | RBB |
Source: Wikipedia
Comparison With Other K24 Family Engine Like K24A1 and K24A3
Here is a comparison of the Honda K24A2 engine with other engines in the K24 family, specifically the K24A1 and K24A3:
| Specification | K24A2 | K24A1 | K24A3 |
|---|---|---|---|
| Compression Ratio | 10.5:1 | 11.0:1 | 11.0:1 |
| Horsepower | 197 hp @ 6,800 RPM (2004-2005 Acura TSX)<br>205 hp @ 7,000 RPM (2006-2008 Acura TSX) | 160 hp | 160 hp |
| Torque | 166 lb-ft @ 4,500 RPM | 132 lb-ft | 132 lb-ft |
| Redline | 7,200 RPM | 7,200 RPM | 7,200 RPM |
| Rev Limit | 7,100 RPM | 7,100 RPM | 7,100 RPM |
| Engine Code | RBB | PRB | PRC |
The main difference between the K24A2 and the other engines in the K24 family is the compression ratio. The K24A2 has a lower compression ratio than the K24A1 and K24A3, which results in slightly less horsepower and torque.
However, the K24A2 still provides good performance and reliability, making it a popular choice for a variety of vehicles.
In terms of power, the K24A2 provides more horsepower than the K24A1 and K24A3, with 205 horsepower in the 2006-2008 Acura TSX models. It also provides more torque, with 166 lb-ft compared to 132 lb-ft for the K24A1 and K24A3.
The K24A2 provides a good balance between power and efficiency, making it a versatile engine choice for a variety of vehicles.
While it may not have the highest power or torque output compared to other engines in the K24 family, it still provides good performance and reliability, making it a popular choice for many car enthusiasts and drivers.
Head and Valvetrain Specs K24A2
The Honda K24A2 engine has a DOHC (Double Overhead Cam) design with VTEC (Variable Valve Timing and Lift Electronic Control) technology, which allows for increased horsepower and torque output while maintaining efficiency.
Here are the head and valvetrain specifications for the K24A2 engine:
| Specification | Value |
|---|---|
| Valve Train | DOHC VTEC |
| Camshaft Type | Chain-driven |
| Number of Valves | 16 |
| Valve Diameter | 30.5 mm (intake)<br>25.5 mm (exhaust) |
| Valve Lift | 9.2 mm (intake)<br>8.3 mm (exhaust) |
These specifications contribute to the overall performance and efficiency of the K24A2 engine, making it a popular choice for a variety of vehicles.
The DOHC VTEC design provides increased airflow into the engine, which allows for more horsepower and torque output.
Additionally, the chain-driven camshafts provide reliability and durability over the long term, and the 16 valves allow for improved engine breathing, further increasing power and efficiency.
The Technologies Used in K24A2 Engine
The Honda K24A2 engine features several advanced technologies that contribute to its performance and efficiency:
1. DOHC (Double Overhead Cam) Design
This design features two camshafts, one for the intake valves and one for the exhaust valves, which provides improved engine breathing, resulting in increased horsepower and torque output.
2. VTEC (Variable Valve Timing and Lift Electronic Control)
This technology allows for improved performance and efficiency by allowing the engine to operate with low-lift and low-duration cam profiles at low engine speeds, and high-lift and high-duration cam profiles at high engine speeds. This results in improved engine response and efficiency.
3. Chain-driven Camshafts
The camshafts are driven by a chain, which provides improved reliability and durability over the long term, as compared to belt-driven camshafts.
4. High-flow Intake and Exhaust Valves
The K24A2 engine features large-diameter intake and exhaust valves, which allow for improved airflow into and out of the engine, resulting in increased horsepower and torque output.
5. Lightweight Aluminum Block
The engine block is constructed from lightweight aluminum, which reduces overall engine weight and contributes to improved performance and fuel efficiency.
These technologies work together to provide the K24A2 engine with improved performance and efficiency, making it a popular choice for a variety of vehicles.
Honda K24A2 Performance Overview
The Honda K24A2 engine is known for its balanced combination of performance and efficiency.
With a high-revving design, VTEC technology, and lightweight construction, the K24A2 engine is capable of delivering impressive horsepower and torque output.
Here are some of the key performance characteristics of the K24A2 engine
1. Power Output
The K24A2 engine produces 205 horsepower and 164 lb-ft of torque, making it a highly capable engine for a variety of vehicles.
2. High-Revving Design
he K24A2 engine is designed for high-rev operation, with a redline of 7200 rpm, which allows for improved engine response and horsepower output.
3. VTEC Technology
The VTEC technology in the K24A2 engine provides improved performance and efficiency by allowing the engine to operate with low-lift and low-duration cam profiles at low engine speeds, and high-lift and high-duration cam profiles at high engine speeds.
4. Lightweight Construction
The lightweight aluminum block of the K24A2 engine reduces overall engine weight, contributing to improved performance and fuel efficiency.
5. Balance of Performance and Efficiency
The K24A2 engine provides a balanced combination of performance and efficiency, making it a popular choice for a variety of vehicles, including sports cars and sedans.
Overall, the Honda K24A2 engine is a highly capable and reliable engine, known for its balanced combination of performance and efficiency.
Whether you’re looking for a powerful engine for your sports car or a reliable engine for your daily driver, the K24A2 engine is a great choice.
What Car Did the K24A2 Come in?
The Honda K24A2 engine was primarily installed in the 2004-2008 Acura TSX. This engine was also used in various other Honda vehicles, such as the Honda CR-V, Honda Civic Si, and Honda Element, among others.
The K24A2 engine provided these vehicles with a powerful and reliable power source, delivering impressive horsepower and torque output, while also offering a balanced combination of performance and efficiency.
If you’re looking for a capable and reliable engine for your car, the Honda K24A2 is definitely worth considering.
How Much HP Does A K24A2 Have?
The K24A2 was fitted in the Acura TSX along with the Honda Oddessey and JDM Accord Type-S. It produced between 197 and 205 horsepower and between 164 and 171 lb/ft of torque.
K24A2 Engine Most Common Problems
Common problems associated with the K24A2 engine include
- Engine leaks: oil or coolant leaks can occur due to damaged gaskets or seals.
- Timing chain tensioner failure: this can lead to a loud ticking noise coming from the engine.
- Engine Misfire: this can be caused by a variety of issues such as a faulty spark plug, a clogged fuel injector, or a failing ignition coil.
- Excessive Oil consumption: this can be caused by worn engine seals, excessive blow-by or worn engine rings.
- Engine Vibration: this can be caused by engine misalignment, damaged motor mounts, or a damaged harmonic balancer.
Parts that are commonly replaced for the K24A2 engine include
- Timing chain kit
- Head gasket
- Engine mount
- Engine oil cooler
- Valve cover gasket
- Water pump.
Upgrades and Modifications Can Be Made
To a K24A2 engine for more power, including
- Upgraded intake manifold (RBC, RRC)
- Upgraded camshafts
- Throttle body upgrade (70mm HR, RSX Type-S, K24A4)
- Upgraded exhaust system (header, high-flow cat, cat-back)
- Fuel system upgrade (injectors, fuel pump)
- ECU tuning (Hondata, K-Pro)
- Forced induction (supercharger, turbocharger)
- Engine management system (AEM, Hondata)
- Lightweight flywheel
- Engine internals upgrade (pistons, rods, bearings)
It’s important to keep in mind that upgrades should be done in a systematic and sequential manner, with proper tuning and monitoring of engine performance after each modification. Consult with a professional mechanic or tuner for the best results.
Other K Series Engines-
| K24Z7 | K24Z6 | K24Z5 | K24Z4 | K24Z3 |
| K24Z1 | K24A8 | K24A4 | K24A3 | K24A1 |
| K24V7 | K24W1 | K20Z5 | K20Z4 | K20Z3 |
| K20Z2 | K20Z1 | K20C6 | K20C4 | K20C3 |
| K20C2 | K20C1 | K20A9 | K20A7 | K20A6 |
| K20A4 | K20A3 | K20A2 | K20A1 |
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