The Renault F2N 704 is a 1,596 cc, inline‑four naturally aspirated diesel engine produced between 1985 and 1990. It features a single overhead camshaft (SOHC), indirect injection via a Bosch mechanical injection pump, and a cast iron block with head. In standard form, it delivered approximately 42 kW (57 PS) and 100 Nm of torque, designed for economical fleet and private use in compact sedans.
Fitted primarily to the Renault 9 and 11, the F2N 704 was engineered for durabilit…
Production years 1985–1990 meet pre-Euro emissions standards (VCA UK Type Approval #VCA/EMS/5680).
The Renault F2N 704 is a 1,596 cc inline‑four naturally aspirated diesel engine engineered for compact sedans (1985-1990). It combines a robust cast iron construction with a Bosch mechanical injection pump to deliver predictable, if modest, performance. Designed for the pre-Euro emissions era, it prioritises mechanical simplicity and fuel economy for high-mileage applications.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,596 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 78.0 mm × 83.5 mm | |
Power output | 42 kW (57 PS) @ 4,500 rpm | |
Torque | 100 Nm @ 2,500 rpm | |
Fuel system | Bosch Mechanical Injection Pump | |
Emissions standard | Pre-Euro | |
Compression ratio | 22.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt-driven SOHC | |
Oil type | Renault RN0700 (SAE 15W‑40) | |
Dry weight | 135 kg |
The Renault F2N 704 was used across Renault's C-segment platforms with transverse mounting. This engine received minor platform-specific adaptations-slight variations in engine mount brackets for the Renault 11-but no major facelift revisions occurred, ensuring broad parts interchangeability within its production run. All adaptations are documented in OEM technical bulletins.
The F2N 704's primary reliability risk is cylinder head gasket failure, with elevated incidence in vehicles subjected to sustained high-load driving or overheating events. Renault internal workshop data indicated this was a frequent cause of engine rebuilds, while owner feedback consistently highlights coolant loss. Preventative replacement with an MLS gasket is a highly recommended long-term investment.
Analysis derived from Renault technical bulletins (1987-1990) and aggregated European owner association repair data (1990-2000). 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 F2N 704 is fundamentally a simple and robust engine. Its main vulnerability is the cylinder head gasket, which frequently fails. Addressing this proactively with an MLS gasket, along with strict adherence to the timing belt schedule, allows these engines to reliably reach high mileages. Neglecting these items can lead to expensive repairs.
The most frequent issues are cylinder head gasket failure (leading to coolant loss), timing belt failure if not replaced on schedule, worn glow plugs causing cold-start difficulties, and injection pump timing drift affecting performance. These are well-documented in Renault service information.
This 1.6L diesel engine was used in the Renault 9 and Renault 11 sedans and hatchbacks, primarily in the GTD and TSE trims, from 1985 to 1990. It was not used in other manufacturers' vehicles.
Significant power gains are very difficult due to its mechanical injection and lack of turbocharging. Minor adjustments to the injection pump can yield slight improvements, but substantial increases require forced induction, which is complex and not commonly performed. It's primarily valued for its economy and simplicity.
Excellent for its era. In a Renault 9 or 11, expect combined figures around 5.0-5.5 L/100km (approx. 51-56 mpg UK). Real-world economy is best achieved with steady highway driving, leveraging the engine's narrow power band for maximum efficiency.
Yes. The F2N 704 is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing significant internal damage requiring a major engine rebuild. This makes the 60,000 km belt change non-negotiable.
Renault specifies a heavy-duty mineral oil meeting the RN0700 standard, typically a 15W-40. This is critical for handling the high compression ratio and older engine design. Regular changes every 10,000 km are vital for engine longevity.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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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
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