The Renault F1N 724 is a 1,870 cc, inline‑four diesel engine produced between 1985 and 1996. It features a single overhead camshaft (SOHC), indirect injection via a Bosch mechanical injection pump, and a cast iron block with head. This rugged unit delivered 46 kW (62 PS) and 120 Nm of torque, designed for durability in commercial and passenger vehicles.
Fitted to the Renault 21, Trafic I, and Express, the F1N 724 was engineered for cost-effective, high-mileage service in varied conditions. Its simple, mechanically governed fuel system prioritised reliability and ease of repair over refinement. Emissions compliance was met through basic engine tuning, aligning with pre-Euro or early Euro 1 standards.
One documented concern is premature failure of the Bosch injection pump diaphragm, which can lead to fuel leaks and erratic running. This issue, referenced in Renault Technical Note MEC 0021, is often linked to fuel contamination or extended service life. The engine design remained largely unchanged throughout its decade-long production.
Production years 1985–1996 meet pre-Euro or early Euro 1 standards depending on market (VCA UK Type Approval #VCA/EMS/5680).
The Renault F1N 724 is a 1,870 cc inline‑four diesel engine engineered for mid-size sedans and light commercial vehicles (1985-1996). It combines a mechanically governed Bosch injection pump with a simple SOHC valvetrain to deliver robust, low-revving torque for load-carrying and economical cruising. Designed for pre-Euro and early Euro 1 compliance, it prioritises mechanical simplicity and field serviceability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,870 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.0 mm × 88.0 mm | |
| Power output | 46 kW (62 PS) @ 4,500 rpm | |
| Torque | 120 Nm @ 2,500 rpm | |
| Fuel system | Bosch mechanical indirect injection pump | |
| Emissions standard | Pre-Euro / Euro 1 (market-dependent) | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven camshaft | |
| Oil type | Mineral oil, API CC/CD or equivalent (SAE 15W‑40) | |
| Dry weight | 145 kg |
The engine's high compression and mechanical injection provide strong low-end torque ideal for commercial use but demand strict fuel filter changes every 20,000 km to protect the Bosch injection pump. API CC/CD 15W-40 mineral oil is critical for bearing and cylinder wall protection. The timing chain is robust but should be inspected at 150,000 km. The non-interference design means a broken chain causes no valve damage. Fuel quality is paramount; contaminated fuel is the primary cause of injection pump failure per Renault Technical Note MEC 0021.
Oil Specs: Requires API CC/CD or equivalent mineral oil (Renault Technical Manual 77 11 123 458). Modern ACEA standards are not applicable.
Emissions: Certification varies by market and year, ranging from pre-Euro to early Euro 1 (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across all model applications.
Renault Technical Information System: Manual 77 11 123 458, Note MEC 0021
VCA Type Approval Database (VCA/EMS/5680)
EEC Directive 80/1269 Power Measurement Standards
The Renault F1N 724 was used across Renault's mid-size platforms with longitudinal mounting. This engine received no major mechanical revisions during its production, ensuring broad parts compatibility. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss at the front of the cylinder block, near the injection pump (Renault Technical Manual 77 11 123 458). The engine is visually identified by its four-cylinder layout, prominent Bosch mechanical injection pump on the right side, and lack of a turbocharger. Critical differentiation from the later F8M: The F1N has a 1.9L displacement and a chain-driven camshaft, while the F8M is 1.6L and often belt-driven.
The F1N 724's primary reliability risk is Bosch injection pump diaphragm failure, with elevated incidence in vehicles using poor-quality fuel or with neglected filter changes. Renault service data indicates this is a leading cause of roadside breakdowns for this engine, while owner reports frequently cite glow plug and starter motor failures in cold climates. Adherence to fuel system maintenance is the single most critical factor for longevity.
Analysis derived from Renault technical bulletins (1985-1996) and owner-reported failure data (1990-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F1N-724.
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Regulation (EC) No 715/2007
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