The KA24E is Nissan’s 2.4-liter inline-four engine from the KA family, produced in the late 1980s and early 1990s for use in models such as the 240SX and certain pickups. It is a single-overhead-cam, eight-valve, fuel-injected powerplant that produced roughly 140–160 horsepower depending on application.
As the electronic-fuel-injected version of Nissan’s early 2.4-liter motors, the KA24E was designed for reliability and ease of maintenance. It sits alongside the later KA24DE, which introduced a dual-overhead-cam head and more valves for improved performance. In short, the KA24E is the original, simpler 2.4-liter EFI engine in the KA lineup.
Origins and design
The KA engine family emerged in the late 1980s as Nissan expanded its inline-four lineup to offer bigger displacement with modern fuel delivery. The KA24E designation signals an electronic fuel-injected setup, paired with a single overhead cam (SOHC) that drives an eight-valve head. This contrasts with the later KA24DE, which moved to a DOHC, 16-valve configuration for higher output.
Technical snapshot
The following items summarize the core specs and typical usage of the KA24E.
- Displacement and architecture: 2.4-liter inline-4 (about 2,389 cc) with an eight-valve SOHC head.
- Fuel system: electronic fuel injection, commonly throttle-body style, with a single camshaft driving the intake and exhaust valves via rocker arms.
- Power and torque: generally in the ballpark of 140–160 horsepower and about 140–160 lb-ft of torque, depending on year and market.
- Drivetrain and applications: used in the Nissan 240SX (S13) in North America for certain trims, as well as various D21/Datsun pickups and other light-duty trucks in different markets.
- Reliability and maintenance notes: known for straightforward maintenance and a timing chain drive; typical wear areas include valve cover/gasket leaks, cooling-system components, and timing-chain guides with age. Regular maintenance helps keep it running smoothly.
The following items summarize the core specs and typical usage of the KA24E.
Conclusion: The KA24E represented Nissan’s robust, torque-friendly 2.4-liter option in the KA family, offering reliable everyday performance rather than the higher-rev characteristics of later designs.
Comparison with KA24DE
Key differences
Within the KA family, the KA24DE is the DOHC, 16-valve successor that delivers more horsepower and modern efficiency, while the KA24E remains the simpler, SOHC, eight-valve variant. The EA/DE distinction also reflects differences in valve count, intake/exhaust layout, and fuel-injection strategies. In practice, the KA24DE generally provides stronger top-end power, whereas the KA24E can be easier to service and potentially more tolerant of certain maintenance conditions on older platforms.
Applications and market availability
Historically, the KA24E appeared in the early Nissan 240SX (S13) line in some markets and in certain Datsun/Nissan pickups. Over time, most markets shifted toward the KA24DE or other engines, making the KA24E increasingly a model-year and market-specific powerplant. Its use today is primarily in classic or collector-grade Nissan models and in maintenance/restoration contexts.
Maintenance and common issues
Before listing common maintenance considerations, note that these reflect typical life-cycle concerns for the KA24E and similar engines of its era.
- Common wear items: valve cover gaskets, intake/exhaust manifold gaskets, and cooling-system seals may develop leaks with age.
- Timing: uses a timing chain; wear on guides/tensioners can lead to jitter or timing drift if not addressed.
- Fuel and emission concerns: older EFI setups may exhibit idle instability or hesitation if injectors, seals, or sensors age.
- Cooling and heat management: thermostat, water pump, and radiator components are critical; overheating can accelerate gasket and seal failure.
- Maintenance baseline: regular oil changes with correct viscosity, periodic inspection of the timing components, and attention to vacuum and PCV systems help longevity.
The following list highlights maintenance considerations commonly discussed by owners and technicians.
Conclusion: Proper, era-appropriate maintenance is key to reliability for the KA24E, with particular attention to the timing chain area, valve covers, cooling components, and the EFI system.
Summary
The KA24E is Nissan’s 2.4-liter inline-four from the KA family, featuring an eight-valve SOHC design and electronic fuel injection. Widely used in late-1980s to early-1990s vehicles such as the 240SX (S13) and various pickups, it offered dependable, torque-focused performance with straightforward maintenance. It sits beside the KA24DE as the DOHC, higher-output successor and remains a topic of interest for enthusiasts maintaining classic Nissan models today.