The Nissan CD20 is a 1,974 cc, inline‑four naturally aspirated diesel engine produced between 1993 and 1999. It features a SOHC, 8‑valve design with indirect injection via a pre‑combustion chamber, prioritising simplicity and durability. Peak output is rated at 47 kW (64 PS) and 132 Nm, making it suitable for light commercial and passenger vehicles where fuel economy and low‑end torque were key.
Fitted primarily to the B14 Sunny, N14 Pulsar, and D21 Navara/Pickup, the CD20 was engineered for dependable, economical transport. Its driving character is defined by modest power but strong low‑end pull, ideal for urban and light load use. Emissions compliance relied on basic mechanical injection and exhaust aftertreatment, meeting Euro 1 standards for its production period.
One documented concern is cylinder head cracking, particularly between valve seats, which can lead to coolant loss and overheating. This issue, referenced in Nissan Technical Bulletin NTB95-089, is often attributed to thermal stress from overheating events or improper coolant maintenance. Production ended in 1999 as Nissan transitioned to more advanced direct injection designs.
Production years 1993–1999 meet Euro 1 standards for relevant markets (VCA UK Type Approval #VCA/EMS/5678).
The Nissan CD20 is a 1,974 cc inline‑four naturally aspirated diesel engineered for compact cars and light trucks (1993-1999). It combines indirect injection with a simple SOHC valvetrain to deliver robust low‑end torque and exceptional fuel economy. Designed to meet Euro 1 standards, it prioritises mechanical reliability over high performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,974 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 83.0 mm × 91.0 mm | |
| Power output | 47 kW (64 PS) @ 4,600 rpm | |
| Torque | 132 Nm @ 2,400 rpm | |
| Fuel system | Indirect injection (CSD type pump) | |
| Emissions standard | Euro 1 | |
| Compression ratio | 21.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain | |
| Oil type | API CD or equivalent (SAE 10W‑30/15W‑40) | |
| Dry weight | 145 kg |
The high compression ratio provides strong starting and low-RPM torque but demands strict adherence to coolant maintenance to prevent cylinder head cracking. API CD specification oil is critical for protecting the indirect injection system's components. Pre-heating via glow plugs is essential in cold climates for reliable starts. The timing chain is generally robust but should be inspected at major service intervals (100,000 km). Fuel quality meeting EN 590 standards is recommended to prevent injector pump wear.
Oil Specs: Requires API CD (or ACEA B2) specification (Nissan SM-CD20). Viscosity varies by climate (10W-30 for moderate, 15W-40 for hot).
Emissions: Euro 1 certification applies to all 1993-1999 models (VCA Type Approval #VCA/EMS/5678). No market-specific variations.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all applications (Nissan PT-1998).
Nissan Technical Information System: Docs SM-CD20, NTB95-089
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Nissan CD20 was used across Nissan's B14/N14/D21 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced mounts in the D21 pickup for load-bearing-and no significant facelift revisions occurred during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface of the cylinder block, just below the #1 injector line (Nissan SM-CD20). The 8th VIN digit for CD20-equipped vehicles is typically 'C'. Visual identification: SOHC 8-valve head with a CSD-type injection pump mounted on the right side (driver's side in LHD). Critical differentiation from later YD22 engines: CD20 uses indirect injection with visible pre-combustion chambers in the head, while YD22 is direct injection. Service parts are generally compatible across all model years and applications.
The CD20's primary reliability risk is cylinder head cracking, with elevated incidence following overheating events. Nissan internal service data indicated this was a leading cause of major engine repair for this model, while its simple mechanical design otherwise proved very durable. Neglecting coolant maintenance makes adherence to the OEM service schedule critical.
Analysis derived from Nissan technical bulletins (1993-1999) and UK DVSA failure statistics (1995-2005). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about NISSAN CD20.
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Regulation (EC) No 715/2007
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