The Nissan L24E is a 2,393 cc, inline‑six petrol engine produced between 1980 and 1986. It features a cast iron block, single overhead camshaft (SOHC), and electronic fuel injection (EFI), delivering outputs around 100–115 kW (135–155 PS) and 186–206 Nm of torque. Its long — stroke design prioritises low — end torque for relaxed cruising.
Fitted primarily to the R30 Skyline and C31 Laurel, the L24E was engineered for smooth, refined performance and durability in executiv…
Nissan
Production years 1980–1986 meet applicable Japanese and export market emissions standards for their production date (Nissan Emissions Certification Docs, JEVIC).
The Nissan L24E is a 2,393 cc inline‑six petrol engine engineered for executive sedans (1980-1986). It combines electronic fuel injection with a single overhead camshaft to deliver smooth, linear power and strong low-end torque. Designed to meet early 1980s emissions regulations, it prioritises drivability and refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,393 cc | |
Fuel type | Petrol | |
Configuration | Inline‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 83.0 mm × 73.7 mm | |
Power output | 100–115 kW (135–155 PS) | |
Torque | 186–206 Nm @ 3,200–4,000 rpm | |
Fuel system | Electronic Fuel Injection (EFI) | |
Emissions standard | Japanese 1980s Standards | |
Compression ratio | 8.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven SOHC | |
Oil type | API SF/SG 10W-40 | |
Dry weight | 185 kg |
The Nissan L24E was used across Nissan's R30/C31 platforms with longitudinal mounting. This engine received platform-specific adaptations-different intake manifolds and accessory brackets for the Skyline and Laurel-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The L24E's primary reliability risk is distributor drive gear wear, with elevated incidence in high-mileage or high-RPM use. Nissan service data indicates this was a recurring service item, while owner reports frequently cite ignition system faults. Neglecting valve clearance adjustments can lead to poor performance and increased wear, making adherence to the maintenance schedule critical.
Analysis derived from Nissan technical bulletins (1980-1986) and owner-reported failure data (1985-2023). Repair procedures should follow manufacturer guidelines.
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The L24E is renowned for its robust cast iron construction and smooth operation. With proper maintenance—especially valve adjustments and distributor gear inspection—it can easily surpass 300,000 km. Its simplicity compared to modern engines is a key factor in its longevity.
The top issues are distributor drive gear wear, EFI electrical faults (connectors, sensors), and neglected valve clearances. Cooling system leaks from aged hoses or the water pump are also common. These are well-documented in Nissan service literature.
The L24E was primarily used in the R30 generation Nissan Skyline (1981-1985) and the C31 generation Nissan Laurel (1980-1986). It was fitted to mid-to-high trim levels like the Skyline 2000TI and Laurel Medalist.
Yes, moderately. Common upgrades include a performance camshaft, ported head, free-flow exhaust, and an aftermarket ECU or piggyback unit. Gains of 15-25 kW are realistic. Forced induction is possible but requires significant internal reinforcement.
Fuel economy is modest by modern standards. Expect 10-12 L/100km (23-28 mpg UK) in city driving and 8-9 L/100km (31-35 mpg UK) on the highway in a Skyline or Laurel. Actual figures depend heavily on driving style and vehicle condition.
No. The L24E is a non-interference engine. If the timing chain fails or jumps, the pistons will not contact the valves. This makes it much more forgiving of timing component failure, though repair is still urgent to prevent further damage.
Nissan originally specified API SF/SG 10W-40 mineral oil. A high-quality modern 10W-40 or 15W-40 semi-synthetic meeting API SL or higher is perfectly suitable and offers better protection for an older engine.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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