The Renault F3N 717 is a 1,721 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1992. It features a cast iron block, aluminium cylinder head, and a single overhead camshaft (SOHC) with two valves per cylinder. Output was typically 55 kW (75 PS), providing adequate, economical performance for its compact vehicle applications.
Fitted primarily to the R9 and R11 models, the F3N 717 was engineered for cost-effective ownership and urban drivability. It offered a smooth, linear power delivery suited for daily commuting, prioritising fuel efficiency and mechanical simplicity over high performance. Emissions compliance for its production period was managed through a carburettor fuel system, meeting the applicable national standards of the time.
One documented concern is premature wear of the camshaft lobes and followers, which can lead to a loss of power and a characteristic tapping noise. This issue, addressed in Renault service documentation, is often linked to infrequent oil changes or the use of incorrect oil viscosity. Later production runs saw revised camshaft metallurgy to improve durability.
Production years 1985–1992 predate the Euro 1 standard; emissions compliance is based on national regulations in effect at time of manufacture (French DRIRE Type Approval).
The Renault F3N 717 is a 1,721 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and saloons (1985-1992). It combines a robust cast iron block with a simple SOHC valvetrain to deliver dependable, low-maintenance performance. Designed for the emissions regulations of its era, it prioritises mechanical durability over high-tech efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,721 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 78.0 mm × 90.0 mm | |
| Power output | 55 kW (75 PS) | |
| Torque | 130 Nm @ 3,000 rpm | |
| Fuel system | Carburettor | |
| Emissions standard | Pre-Euro (National Standards) | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven | |
| Oil type | Mineral 15W-40 or 10W-40 | |
| Dry weight | Not specified in available OEM docs |
The simple SOHC design offers mechanical robustness but requires strict 60,000 km timing belt replacement intervals to prevent catastrophic engine damage. The use of mineral oil is specified due to the engine's design tolerances and era. The carburettor requires periodic tuning and is sensitive to fuel quality. Camshaft lobe wear is a known issue; preventative maintenance with correct oil and timely changes is strongly advised per Renault service guidelines. Cooling system maintenance is critical to prevent head gasket issues.
Oil Specs: Requires mineral 15W-40 or 10W-40 specification (Renault Service Manual 77 11 065 670). Synthetic oils not recommended for original equipment.
Emissions: Pre-Euro certification based on French national regulations in effect (DRIRE Type Approval). No EU-wide standard applicable.
Power Ratings: Measured under CEE/ECE standards. Output is consistent across model years (Renault Homologation Dossier).
Renault Service Manual (Ref. 77 11 065 670)
Renault Technical Note (TN 045/87)
Renault EPC (Ref. 77 11 296 558)
French DRIRE Type Approval Documentation
The Renault F3N 717 was used across Renault's R9/R11 platform with transverse mounting and was not licensed to other manufacturers. This engine received minor running updates over its lifespan, but no major facelift revisions affecting core compatibility occurred. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the front face of the cylinder block, near the gearbox flange. The full code (e.g., F3N 717) should be clearly visible. Differentiate from the similar F2N engine by displacement (F3N is 1.7L, F2N is 2.0L) and power output. The carburettor is a large, prominent component atop the intake manifold. Service parts, particularly for the ignition and fuel system, are specific to this engine variant and its carburettor type.
The F3N 717's primary reliability risk is camshaft lobe and follower wear, with elevated incidence in vehicles subjected to infrequent oil changes. Renault service data indicates a correlation between oil service neglect and premature cam wear, while general owner reports highlight carburettor tuning as a common maintenance task. Using incorrect oil viscosity or extending oil change intervals makes preventative maintenance critical.
Analysis derived from Renault technical bulletins (1985-1992) and French DRIRE service data (1985-1995). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F3N-717.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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