1993-2001 Nissan Altima 2.4L DOHC Engine JDM KA24DE

About this unit

Engine Specifications

• Engine Code: KA24DE (Altima / FWD Configuration)

• Displacement: 2.4 Liters (2,389 cc)

• Configuration: Inline 4-Cylinder

• Valvetrain: DOHC 16-Valve (Chain-Driven Timing)

• Block/Head Material: Cast Iron Block / Aluminum Cylinder Head

• Horsepower Output: Approx. 150 hp @ 5,600 RPM

• Torque Output: Approx. 154 lb-ft @ 4,400 RPM

Vehicle Fitment

This long block is configured as a direct replacement for North American front-wheel-drive configurations:

• Nissan Altima: 1993, 1994, 1995, 1996, 1997 (1st Generation – U13 Chassis)

• Nissan Altima: 1998, 1999, 2000, 2001 (2nd Generation – L30 Chassis)

• CRITICAL RWD COMPATIBILITY NOTE: This engine is specifically pulled from a Front-Wheel Drive (FWD) vehicle platform. While the core block shares the KA24DE architecture with the rear-wheel-drive Nissan 240SX (S13/S14) and Nissan Frontier, the engine block casting, engine mounts, intake manifold layout, and accessory bolt holes are entirely different. This unit will NOT drop into a Nissan 240SX or truck without extensive, advanced modifications. It is sold primarily as an Altima replacement.

Long Block Installation Notes

PROFESSIONAL INSTALLATION WARNING: This assembly is provided strictly as a Long Block (assembled cylinder head, engine block, oil pan, and internal moving components). To avoid check engine codes or immediate performance issues, ensure your mechanic follows these guidelines:

1. Transfer USDM External Accessories: You MUST swap over your vehicle’s original intake manifold plenum, fuel rail, injectors, exhaust manifold, alternator, power steering pumps, and A/C compressor brackets.

2. Reuse Your Original Wiring & Sensors: JDM wiring harnesses are cut or configured for right-hand drive architectures. Discard the JDM harness and utilize your original USDM engine wiring loom. Additionally, transfer your original distributor, Crankshaft Position Sensor, and water temperature sensors to ensure plug-and-play compatibility with your factory ECU.

3. Inspect/Replace the Water Pump: Take advantage of the engine block being on an engine stand and install a brand-new water pump, a fresh thermostat, and a high-quality oil filter.

4. Address Front and Rear Seals: While the motor is accessible, replace the front crankshaft seal and rear main seal to protect your garage floor from future leaks.

5. Fluid & Timing Protocols: Refill the system with a premium 5W-30 or 10W-30 motor oil and a fresh filter. The KA24DE utilizes a highly durable timing chain; ensure the tensioners are visually inspected for appropriate tension prior to completing the drop-in process.

What is included

You receive exactly what is pictured. Engines are supplied as a long block assembly with the components visible in the photos. Accessories such as the alternator, starter, intake manifold or sensors are included only where you can see them on the unit, so check the photographs before ordering and ask us if anything is unclear.

Before you order

• Confirm the engine code against your own vehicle, not just the model year.
• Japanese market units can differ from the US version in intake, loom and sensors.
• Replace the timing components, water pump and seals while the unit is out. It is cheap insurance on an engine this age.
• Keep your original accessories until the swap is finished and running.