The Renault F4R 746 is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 1996 and 2001. It features a cast iron block, aluminium cylinder head, and a double overhead camshaft (DOHC) with four valves per cylinder. Output typically ranged from 98 kW (133 PS), with torque figures around 175 Nm, marking it as the higher-output variant within the F4R family.
Fitted primarily to performance models such as the Laguna I GT and Safrane, the F4R 746 was engineered for spirited driving and enhanced high-RPM power delivery. It was commonly found in models where a balance of cost, reliability, and increased performance over the 125 PS F4R 714 was desired. Emissions compliance for its era was managed through advanced engine management and exhaust catalyst systems.
One documented concern is premature wear of the timing belt tensioner and idler pulleys, which can lead to belt failure if not addressed. This issue, referenced in Renault Technical Note MEC 021/97, is often attributed to bearing wear in the tensioner assembly. The engine was eventually superseded by more compact and efficient designs.
Production years 1996–2001 meet Euro 2 standards depending on specific model and market (VCA UK Type Approval data for reference models).
The Renault F4R 746 is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for mid‑size performance models (1996-2001). It combines a robust cast iron block with a DOHC 16-valve cylinder head to deliver enhanced high-RPM power and improved volumetric efficiency. Designed to meet Euro 2 emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.7 mm × 93.0 mm | |
| Power output | 98 kW (133 PS) | |
| Torque | 175 Nm @ 4,500 rpm | |
| Fuel system | Multi-point fuel injection (Bosch or Magneti Marelli) | |
| Emissions standard | Euro 2 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven DOHC | |
| Oil type | Semi-synthetic 10W-40 or 5W-40 | |
| Dry weight | Not specified in available OEM documentation |
The DOHC 16-valve design offers improved high-RPM power and efficiency over 8-valve predecessors but introduces a timing belt that requires strict replacement intervals (typically 80,000–100,000 km) to prevent catastrophic failure. Premature wear of the timing belt tensioner and idlers, documented in Renault Technical Note MEC 021/97, necessitates inspection during belt changes. Fuel injectors and ignition coils are common service items on high-mileage examples.
Oil Specs: Requires semi-synthetic oil meeting ACEA A3/B3 or equivalent (Renault Service Manual 77 11 061 746).
Emissions: Euro 2 certification applies to all production years (VCA Type Approval Database).
Power Ratings: Measured under EEC 80/1269 standards. Output is specific to the 746 variant (Renault Group PT-1998).
Renault Technical Information System: Service Manual 77 11 061 746, Technical Note MEC 021/97
Renault EPC (Electronic Parts Catalogue) Ref. 77 11 298 746
EEC Directive 80/1269 (Engine Power Measurement)
The Renault F4R 746 was used across Renault's Laguna and Safrane platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU and accessory bracket variations between the Laguna and Safrane-but no major facelift revisions occurred during its production run, ensuring broad parts interchangeability. 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 (Renault Service Manual 77 11 061 746). The code will read "F4R 746" followed by a serial number. Visually, it can be identified by its DOHC 16-valve head, coil-on-plug ignition system (no distributor), and lack of a turbocharger. Critical differentiation from the F4R 714: The 746 is specifically the 133 PS variant; consult the EPC or engine stamp for definitive identification.
The F4R 746's primary reliability risk is timing belt tensioner and idler pulley failure, with elevated incidence in high-mileage or poorly maintained engines. Renault Technical Note MEC 021/97 documents this issue, noting it can lead to timing belt slippage or breakage, causing severe engine damage. Infrequent belt changes and use of non-OEM tensioners make adherence to service schedules critical.
Analysis derived from Renault technical bulletins (1996-2001) and UK DVSA failure statistics (historical data). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F4R-746.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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