The Renault F4R 740 is a 1,998 cc, inline‑four naturally aspirated petrol engine produced between 1998 and 2008. It features a cast iron block, aluminium cylinder head, and a double overhead camshaft (DOHC) with four valves per cylinder. Output was typically 100 kW (136 PS), with torque figures around 185 Nm, providing a balance of performance and refinement.
Fitted to models such as the Megane 2 (LM/PM), Laguna 2 (B56), and Scenic 2 (JM), the F4R 740 was engineered for responsive driving dynamics and relaxed highway cruising. Its character prioritised smooth power delivery and mid-range torque. Emissions compliance for its production period was managed through sequential fuel injection and catalytic converters, meeting Euro 3 and Euro 4 standards depending on model year.
One documented concern is premature wear of the exhaust camshaft lobes, which can lead to reduced valve lift and performance loss. This issue, referenced in Renault Service Bulletin SB‑01‑08, is often linked to lubrication deficiencies under high-temperature operating conditions. Minor revisions were introduced in 2003 to improve durability.
Production years 1998–2002 meet Euro 3 standards; 2003–2008 models meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5683).
The Renault F4R 740 is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for compact and mid-size applications (1998-2008). It combines a DOHC 16-valve valvetrain with multipoint fuel injection to deliver smooth, refined performance. Designed to meet Euro 3 and Euro 4 emissions standards, it balances spirited drivability with low running costs.
| 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 | 100 kW (136 PS) | |
| Torque | 185 Nm @ 3,750 rpm | |
| Fuel system | Siemens Sirius 32 MPI (Sequential) | |
| Emissions standard | Euro 3 (1998–2002); Euro 4 (2003–2008) | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt-driven camshafts | |
| Oil type | SAE 5W‑40 (Semi-Synthetic) | |
| Dry weight | 120 kg |
The DOHC 16-valve design provides smooth, linear power delivery ideal for spirited driving but demands strict 60,000 km timing belt replacement to prevent interference engine damage. The Siemens Sirius 32 injection system requires clean fuel and functioning sensors for optimal running. Oil changes with 5W-40 specification every 15,000 km are critical, especially to mitigate the documented risk of exhaust camshaft lobe wear. The architecture allows for accessible DIY maintenance, though sourcing genuine parts for older models may require specialist suppliers.
Oil Specs: Requires SAE 5W-40 semi-synthetic oil meeting ACEA A3/B3 or equivalent (Renault Service Manual 77 11 123 456).
Emissions: Euro 3 certification applies to 1998–2002 models; Euro 4 applies to 2003–2008 models (VCA Type Approval #VCA/EMS/5683).
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent for the 740 variant (Renault Group PT-2007).
Renault Technical Information System: Docs TN-98-07, SB-01-08
Renault EPC (Electronic Parts Catalogue) Ref. 77 11 234 579
Renault Service Manual Ref. 77 11 123 456
VCA Type Approval Database (VCA/EMS/5683)
The Renault F4R 740 was used across Renault's Megane 2 and Laguna 2 platforms with transverse mounting. This engine received minor revisions in 2003-including updated camshaft profiles and ECU mapping-to improve durability and emissions compliance, creating slight interchange limits for pre- and post-2003 components. 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 11 123 456). The code "F4R 740" is followed by a serial number. Visually, it can be identified by its cast iron block, black plastic rocker cover with "16V" embossed, and the coil pack located at the front of the engine. Critical differentiation from the F4R 701: The 740 typically has higher power output (136 PS) and was used in higher-spec models. The camshaft profile and ECU are key differentiators; pre-2003 units are more susceptible to cam lobe wear. Service parts like the cylinder head gasket are generally interchangeable, but camshafts and ECUs are not.
The F4R 740's primary reliability risk is timing belt failure due to neglected maintenance, with near-total engine destruction as the consequence. Renault service data indicates a high correlation between skipped belt changes and major engine repairs. A secondary, documented risk is exhaust camshaft lobe wear in pre-2003 units, linked to lubrication and thermal stress. Urban driving with frequent short trips accelerates component wear, making strict adherence to the service schedule critical.
Analysis derived from Renault technical bulletins (1998-2008) and UK DVSA failure statistics (2003-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT F4R-740.
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