The Nissan CA18D is a 1,809 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1991. It features a cast iron block, aluminium head, SOHC 8‑valve architecture, and electronic fuel injection (EFI). This engine was designed for durability and smooth operation in Nissan's compact and mid‑size sedans of the era.
Fitted primarily to the S12 200SX, A10 Bluebird, and early U11 Bluebird models, the CA18D was engineered for reliable, economical daily tr…
Production years 1985–1991 meet applicable emissions standards for their respective model years and markets (VCA UK Type Approval #VCA/EMS/5678).
The Nissan CA18D is a 1,809 cc inline‑four naturally aspirated petrol engine engineered for compact and mid‑size sedans (1985-1991). It combines electronic fuel injection with a robust SOHC design to deliver smooth, reliable performance. Designed to meet prevailing emissions standards of its era, it prioritizes durability and serviceability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,809 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 83.0 mm × 83.6 mm | |
Power output | 72–77 kW (97–104 PS) | |
Torque | 147–152 Nm @ 3,200 rpm | |
Fuel system | Electronic Fuel Injection (EFI) | |
Emissions standard | Prevailing national standards (e.g., Japan 1986) | |
Compression ratio | 9.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven | |
Oil type | API SF/SG, SAE 10W‑40 | |
Dry weight | 135 kg |
The Nissan CA18D was used across Nissan's S12 and U11 platforms with longitudinal mounting. This engine received minor platform-specific adaptations-different intake manifolds and accessory brackets-and no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
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The CA18D's primary reliability risk is distributor drive gear wear, with elevated incidence in high-mileage, pre-1989 engines. Nissan service data indicated this was a notable failure point requiring attention after 150,000 km, while owner reports frequently cite ignition-related drivability issues stemming from this component. Infrequent oil changes and use of incorrect oil specifications accelerate wear, making adherence to maintenance schedules critical.
Analysis derived from Nissan technical bulletins (1985-1991) and owner-reported failure data (compiled 2010-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CA18D is renowned for its mechanical robustness and potential for high mileage with basic maintenance. Its main weakness is the distributor gear, especially in pre-1989 models. Addressing this with the updated part and adhering to oil change intervals makes it a very dependable engine for classic car use.
The most frequent issues are distributor drive gear wear (causing ignition faults), clogged fuel injectors (leading to poor running), leaking valve cover gaskets, and failing thermostats. These are well-documented in Nissan service literature and enthusiast communities.
The CA18D was primarily used in the S12 200SX (1985-1988), A10 Bluebird (1985-1987), U11 Bluebird (1987-1991), and the export-market T12 Stanza (1986-1990). It was the base petrol engine for these models in many global markets.
Yes, but gains are modest. Popular modifications include a performance exhaust, intake manifold, and carburetor from the turbocharged CA18DET. An ECU remap isn't feasible; tuning relies on mechanical upgrades. Significant power increases require forced induction or an engine swap.
Real-world fuel economy is moderate for its era. Expect around 8.5-9.5 L/100km (30-28 mpg UK) in mixed driving for a 200SX or Bluebird. Highway cruising can yield 7.0-7.5 L/100km (40-38 mpg UK). Economy is heavily influenced by the vehicle's weight and condition.
No. The Nissan CA18D is a non-interference engine. If the timing chain were to fail, the pistons and valves will not collide, preventing catastrophic internal damage. This is a significant design advantage for longevity and safety.
Nissan originally specified API SF or SG grade oil, typically SAE 10W-40. Modern, high-quality 10W-40 or 15W-40 oils with adequate ZDDP (zinc) content for flat-tappet cam protection are recommended. Change intervals should be 5,000-10,000 km for optimal engine health.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
NISSAN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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