The Nissan SD22 is a 2,164 cc, inline‑four naturally aspirated diesel engine produced between 1980 and 1986. It features a cast iron block and head, indirect injection via a pre — combustion chamber, and a mechanically governed fuel pump, delivering outputs around 48–51 kW (65–69 PS) and 130–132 Nm of torque. Its robust, simple design prioritises durability and ease of maintenance for commercial and utility applications.
Fitted primarily to the Datsun 720 pickup and Van…
Nissan
Production years 1980–1986 meet applicable Japanese and export market emissions standards for their production date (Nissan Emissions Certification Docs, JEVIC).
The Nissan SD22 is a 2,164 cc inline‑four diesel engine engineered for light commercial vehicles (1980-1986). It combines a cast iron block with indirect injection to deliver rugged, low-maintenance performance ideal for workhorse applications. Designed to meet early 1980s emissions regulations, it prioritises mechanical simplicity and serviceability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,164 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, OHV, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 83.0 mm × 100.0 mm | |
Power output | 48–51 kW (65–69 PS) | |
Torque | 130–132 Nm @ 2,200 rpm | |
Fuel system | Indirect injection (pre-combustion chamber), mechanical pump | |
Emissions standard | Japanese 1980s Standards | |
Compression ratio | 21.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Gear-driven OHV | |
Oil type | API CC/CD 15W-40 | |
Dry weight | 220 kg |
The Nissan SD22 was used across Nissan's Datsun 720/Vanette platforms with longitudinal mounting. This engine received platform-specific adaptations-different engine mounts and accessory drives for the Pickup and Vanette-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The SD22's primary reliability consideration is injector nozzle coking, with elevated incidence in vehicles using low-grade fuel or subjected to prolonged idling. Nissan service data indicates this was a routine service item, while owner reports frequently cite glow plug failures in cold climates. Neglecting valve clearance adjustments can lead to poor combustion 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 SD22 is renowned for its rugged, overbuilt construction. With basic maintenance—especially valve adjustments and using good quality diesel fuel—it can easily surpass 400,000 km. Its mechanical simplicity makes it easy to repair and very forgiving.
The most common issues are coked injector nozzles (SIB DIE-02), glow plug failures in cold weather, and neglected valve clearances. Cooling system leaks from aged hoses or the water pump are also typical. These are well-documented in Nissan service literature.
The SD22 was primarily used in the Datsun 720 pickup truck (1980-1986) and the Nissan Vanette cargo/passenger van (C22, 1982-1986). It was fitted as the base diesel option in these utilitarian vehicles.
Minimal tuning potential exists. The mechanical fuel pump can be carefully adjusted for slightly more fuel delivery, but gains are marginal (5-8 kW). Adding a turbocharger is a complex, custom fabrication project requiring significant engine and cooling system modifications.
Fuel economy is excellent for its era and type. Expect 8-9 L/100km (31-35 mpg UK) in mixed driving in a Datsun 720 pickup. The Vanette, being heavier, might return 9-10 L/100km (28-31 mpg UK). Actual figures depend heavily on load and driving style.
No. The SD22 is a non-interference engine. If the timing gears fail or jump, the pistons will not contact the valves. This inherent safety makes it very robust for commercial use.
Nissan originally specified API CC/CD 15W-40 mineral oil. A high-quality modern 15W-40 diesel oil meeting API CI-4 or higher is perfectly suitable and offers better protection for an older engine, especially under load.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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