Honda K24: Everything You Need to Know | Specs and More

The K24 is one of several engines in Honda’s popular K-series. The series launched in 2001. The engines stand out for friction-reducing technology and electronically controlled ignition timing. All are four-stroke, four-cylinder engines. They are all made with short-block engines and sleeves made of cast iron. These engines replaced the previous B series.

The K24 engine from Honda is last in the K-Series. Its production years in the US ranged from 2002 to 2014. It was used by Honda as a more advanced, efficient, and powerful engine. As with many of the company’s engines, it has a reputation for running smoothly and efficiently for a long time. In fact, cars equipped with these engines can easily reach six digits on the odometer, surpassing other brands for reliability and performance.

Honda K24: Applications

In comparison to other Honda engines, the K24 stands out for its better exhaust flow, increased air intake flow, fortified connecting rods, and an updated crankshaft with additional counterbalanced weight. The engine is made with oversize intake valves sized 1 mm and larger and a lift lobe on the intake cam with over 12 degrees of additional duration and 0.99 mm of extra lift. Depending on the intake engine, the radius on select intake pipes was widened from 70 to 80 mm.

The 24-series engines are found in the following vehicles:

  • CR-V
  • Civic
  • Accord
  • Stream
  • Integra
  • Civic
  • RSX (Acura)

Honda K24: Common Problems

Despite the fact that this engine is tough and long-lasting, it is not without problems. One main component on the engine that can fail is the timing chain sensor. The problem started to develop when the company switched timing belts to connect the crankshafts with the camshafts. Closing the gap of the piston by bringing it closer to the chain by a single tooth is the easiest solution to the problem, but it might not be a permanent solution. Other issues with this engine include that the camshaft can wear out easily and the idle is sometimes rough. Leaking engine oil has also been reported, which makes keeping up with regular oil changes essential to maintaining proper health of the Honda K24. Some owners have also noted hearing engine noise upon starting the car, which can signal a deterioration (and necessitate replacement) for the engine’s VTC gear.

Honda K24: Basic Specs

  • A1
  • Production years: 2002
  • Power output: 160 HP
  • Torque: 162 LB-FT
  • Redline: 6,500 RPM
  • Compression ratio: 9.6:1
  • Block deck height: 231.55 mm
  • A2
  • Production years: 2002-2008
  • Power output: 197-205 HP
  • Torque: 171-164 LB-FT
  • Redline: 7,100 RPM
  • Compression ratio: 10.5:1
  • A3
  • Production years: 2003-2007
  • Power output: 197 HP
  • Torque: 171 LB-FT
  • Redline: 7,200 RPM
  • Compression ratio: 10.5:1
  • A4
  • Production years: 2003-2006
  • Power output: 160 HP
  • Torque: 161 LB-FT
  • Redline: 6,800 RPM
  • Compression ratio: 9.7:1
  • A8
  • Production years: 2006-2014
  • Power output: 166-180 HP
  • Torque: 160-161 HP
  • Redline: 6,800 RPM
  • Compression ratio: 9.7:1-10.5:1

Honda K24: Tuning Potential

The stock power output for the engine can reach 205 HP. With the addition of a turbocharger that power increases to 400HP+.  Other performance parts can increase the engine’s power potential to the upper 200s and even 300 HP. Of course, many vehicles equipped with a K24 engine stick with a naturally aspirated engine setup. For N/A vehicles, an intake, full exhaust, throttle body, and quality tune can push the engine to near 300whp.

Another recommendation for modification is replacing the head of the K24 with that of the K20. The advantage of using the K20’s head is that it is built better than the one in the Honda K24. It also has higher-quality valve springs and camshafts. Modification recommendations include replacing the K24’s water pump with a K20 water pump to accommodate the new oil cooler and coolant fluid.

Honda K20 vs K24: Which is Better?

Production of the K20 engine precedes that of the K24. Overall, the K20-series engines are simpler and less expensive to replace. They also generally have fewer problems. The transmissions of the K20 series are better than those in the K24 family. However, K24-series engines have a larger capacity of 2.4L and provide more torque. They are easy to modify and are a great platform for enhancing sports cars, notably the Formula 3 series. The K24-family engines are easier to modify than the K20-series and respond better to modifications. Since the K24 engines have camshafts that lack a high lift, they are better for street racing instead of regular driving when tuned. As a whole, they are better in stock form than the K20 series when tuned.

Most components can be swapped out between engines. However, there are parts that cannot be interchanged between the two engines:

  • Timing chain and timing chain cover
  • Dipstick
  • Head gasket

Both the K20 and K24 have strengths in stock form. The K20 has slightly fewer problems, a better timing chain, and more displacement. However, the K24 offers good power output. It is a larger engine and has more torque, too. The K24 is also easier and less expensive to tune. There are a number of tuning mechanisms available for the K20, however, and it is a more common engine with more readily available parts.

8 thoughts on “Honda K24: Everything You Need to Know | Specs and More”

  1. well REDLINE is what is the max RPM of the car above REDLINE of your car the engine can be hurt like blown head gasket not a big deal but if inter cooler gets inside the engine may hurt the engine and if you have a diesel car you shouldn’t go above 3000 RPM with gasoline you can go up to 9000 RPM and you can go faster if you are higher rpm so TORQUE
    is how much can your car pull diesel engines have more TORQUE because the diesel spend more time pushing the piston down than gasoline and that’s why gasoline can rev higher than diesel and diesel does not have a spark plug to ignite the fuel the diesel engines use the compressed air which it gets really hot and than the diesel injected to the cylinder and the whole thing ignites for the gasoline fuel and air mixed together on the throttle body to make a better power
    so redline is how much can your car rev
    and torque is how much can pull or push it self (the car)
    diesel engines have more torque but less redline or rev
    but gasoline engines less torque but higher redline longer the gears and more horsepower
    horsepower is work overtime
    thats why big trucks have diesel engines instead of gasoline so they can have more weight to the truck to transport more work

  2. This is helpful. How high passed the redline can one go on a car, say my 2006 base modle Honda Accord with the 2.4 Inline 4. How high up passed the redline before the engine essentially blows?

  3. I have a complete in great shape low mileage K24A4 with 5 speed transaxle and cv joints etc in a 2003 Accord in which the body has been totally trashed but everything under hood and drive train and electrical is like new. What would be involved in swapping the complete system in another 2003-5 Accord but that has a 3.0 v6 and auto transaxle?

  4. Hi am rebuilding my k24a1 crv engine. am interested in getting the most hp out of it.I’ve done some research about maximizing the full potential of the economy version but know am a bit confused as to what types of mods to do. some said that all I needed to do is change the cams,valve springs,porting the head, using type s oil pump as well as turbocharging the engine, but know after reviewing your video which you talked about swapping the entire head for a performance head as well as using sleeve and cast iron pistons in the block know am not sure how i should move forward with this built, I would prefer to keep the motor naturally aspirated as we as stock parts. Am looking for a range between 450hp-500whp so what do you recommend.

  5. The new K24W with premium fuel has a decent powerband — coupled with the Second Generation CVT. It took about 5 tanks or 55 starts to complete the tune, but it does a pretty good job!

  6. I m on K24A3 6MT (stock) and thinking of swapping with other stock high compression (OEM) pistons – not a mechanic but CRV or RB3 Absolute are running those – am I right?
    Can I do this swap and what is pro n con or +ve n – ve results upon swapping?


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