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 drivabili…
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | Not specified in available OEM docs |
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.
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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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The F3N 717 is mechanically simple and robust, making it potentially very reliable long-term. Its main vulnerabilities are camshaft wear (mitigated by correct oil and changes) and the timing belt. With strict adherence to the 60,000 km belt change and proper oil maintenance, these engines can achieve high mileages.
The most critical issues are camshaft lobe/follower wear and timing belt/tensioner failure. Other common problems include carburettor faults requiring tuning or overhaul, and cooling system leaks (hoses, water pump, head gasket). These are well-documented in Renault service literature.
The F3N 717 was used in the Renault R9 (1985-1989) and Renault R11 (1985-1992) across various trim levels, primarily the GTL and TSE variants. It was not used in any other Renault models or licensed to other manufacturers.
Significant power gains are difficult. Minor improvements can be had from a performance exhaust, carburettor re-jetting, or a mild camshaft upgrade. Its SOHC 8-valve design is a fundamental limit. Most 'tuning' focuses on restoring factory performance and improving drivability.
Expect modest fuel economy by modern standards. In an R9 or R11, typical combined consumption is around 7.5-8.5 L/100km (38-33 mpg UK). City driving can see figures of 9-10 L/100km, while highway cruising might achieve 6.0-6.5 L/100km (47-43 mpg UK).
Yes. The F3N 717 is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe and expensive internal engine damage. This makes preventative belt changes absolutely critical.
Renault originally specified a high-quality mineral oil, typically 15W-40 or 10W-40, for the F3N 717. While a good semi-synthetic 10W-40 can be used in well-maintained engines, sticking to the manufacturer's mineral oil recommendation is often safest for older units to protect the camshaft.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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