The Renault F3N 741 is a 1,721 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1996. It features a cast iron block, aluminium head, and a single overhead camshaft (SOHC) with 8 valves. Output ranged from 64 kW (87 PS) to 72 kW (98 PS), delivering adequate performance for its era's compact and mid-size vehicles.
Fitted to models such as the R9, R11, and early R19, the F3N 741 was engineered for reliability and cost-effective ownership. It offered predictable power delivery suitable for urban and highway driving. Emissions compliance for its production period was met through carburetion or single-point injection, aligning with prevailing standards before stringent Euro regulations.
One documented concern is premature wear of the timing belt tensioner pulley, which can lead to belt slippage or failure if not inspected. This issue, noted in Renault service documentation, is often linked to the original plastic pulley design. Around 1990, Renault began transitioning to more durable components for later F3N variants.
Production years 1985–1996 predate the Euro 1 standard (1992); compliance is based on national regulations of the era (VCA UK Type Approval historical records).
The Renault F3N 741 is a 1,721 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and saloons (1985-1996). It combines a robust cast iron block with SOHC 8-valve architecture to deliver predictable, economical performance. Designed for pre-Euro emissions standards, it prioritizes mechanical simplicity and serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,721 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 81.0 mm × 83.5 mm | |
| Power output | 64–72 kW (87–98 PS) | |
| Torque | 135–145 Nm @ 3,500 rpm | |
| Fuel system | Carburetor or Single-Point Injection | |
| Emissions standard | Pre-Euro (National Standards) | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | Mineral 15W-40 or 10W-40 | |
| Dry weight | 125 kg |
The SOHC design offers mechanical simplicity but requires strict 60,000 km timing belt replacement intervals to prevent catastrophic engine damage from belt failure. The original plastic tensioner pulley is a known weak point; upgrading to a later metal version is recommended. Carbureted versions demand periodic tuning for optimal economy. Using the correct mineral oil specification is critical for older engine seals. Fuel system choice (carburetor vs. SPI) affects drivability and maintenance complexity.
Oil Specs: Requires mineral 15W-40 or 10W-40 specification (Renault Owner's Manual). Modern synthetics may not be suitable for older seals.
Emissions: Pre-Euro certification based on national regulations of the era (VCA Historical Records). Not applicable to modern standards.
Power Ratings: Measured under SAE J1349 standards. Output varies significantly between carbureted and injected variants (Renault PT-1995).
Renault Technical Information System: Docs RTM-F3N, SIB F3N-01
Renault EPC (Electronic Parts Catalogue) Doc. F3N-741
SAE International: J1349 Engine Power Certification Standards
The Renault F3N 741 was used across Renault's R9/R11 platforms with transverse mounting. This engine received platform-specific adaptations-notably different engine mounts and accessory layouts between the R9 hatchback and R11 saloon-and from 1990 the introduction of single-point injection created minor fuel system interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the gearbox flange (Renault RTM-F3N). The 8th VIN digit often corresponds to engine type for R9/R11 ('F' for F3N family). Critical differentiation from later F3P: F3N has a distributor ignition system and either a carburetor or throttle-body injection, while F3P uses multi-point injection. Pre-1990 models typically have carburetors; post-1990 units often feature single-point injection. Service parts for the timing belt system require verification of the tensioner pulley type (plastic pre-1990 vs. metal post-1990).
The F3N 741's primary reliability risk is timing belt failure due to neglected service intervals or tensioner pulley wear. Renault service data indicates a high correlation between missed belt changes and major engine damage. Extended service intervals and the use of non-OEM tensioners significantly increase failure risk, making adherence to the 60,000 km replacement schedule critical.
Analysis derived from Renault technical bulletins (1985-1996) and historical service data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F3N-741.
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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