The Renault B1B 707 is a 1,397 cc, inline‑four naturally aspirated petrol engine produced between 1985 and 1996. It features a single overhead camshaft (SOHC) design with two valves per cylinder and a carbureted fuel system in early variants, later transitioning to single-point injection. In standard form, it delivered approximately 55 kW (75 PS), providing adequate performance for its lightweight supermini applications.
Fitted primarily to the Renault 5 (Supercinq) and Express van, the B1B 707 was engineered for economy, simplicity, and ease of maintenance in high-volume urban use. Emissions compliance for its production period was met through basic engine management and exhaust aftertreatment, aligning with Euro 1 standards for later models.
A documented service concern involves premature wear of the timing belt tensioner pulley, which can lead to belt slippage or failure. This issue is referenced in Renault Service Note MEC‑022. The tensioner's design makes it susceptible to bearing wear, particularly if maintenance intervals are extended.
Production years 1985–1992 meet pre-Euro standards; 1993–1996 models meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2345).
The Renault B1B 707 is a 1,397 cc inline‑four naturally aspirated petrol engine engineered for supermini applications (1985-1996). It combines a simple SOHC valvetrain with carburetion or single-point injection to deliver reliable, economical performance. Designed to meet pre-Euro and later Euro 1 standards, it prioritizes serviceability and low running costs.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,397 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.8 mm × 77.0 mm | |
| Power output | 55 kW (75 PS) | |
| Torque | 105 Nm @ 3,500 rpm | |
| Fuel system | Carburetor / Single-point injection (SPI) | |
| Emissions standard | Pre-Euro (1985–1992); Euro 1 (1993–1996) | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt‑driven camshaft | |
| Oil type | API SG/CC (e.g., SAE 15W‑40) | |
| Dry weight | Not specified in available OEM docs |
The SOHC design provides predictable, low-RPM torque suited for city driving but lacks high-RPM power. The timing belt is critical; failure in this interference engine causes catastrophic damage. Replace it every 80,000 km or 4 years, including the tensioner pulley per Service Note MEC‑022. Carbureted models require periodic adjustment; SPI models are more consistent but can suffer from idle control valve issues. Use standard mineral oil; synthetic is unnecessary for this low-stress engine.
Oil Specs: Requires API SG/CC specification oil (Renault Technical Manual RTM-B1B). A 15W-40 mineral oil is standard and sufficient for all climates.
Emissions: Euro 1 certification applies to 1993–1996 models only (VCA Type Approval #VCA/EMS/2345). Pre-1993 models have no formal emissions standard.
Power Ratings: Measured under EEC 80/1269 standards. Output is consistent across carbureted and SPI variants (Renault Group PT‑1990).
Renault Technical Information System: Manual RTM-B1B
Renault EPC (Electronic Parts Catalogue) Ref. B1B707
Renault Service Note MEC‑022
VCA Type Approval Database (VCA/EMS/2345)
The Renault B1B 707 was used across Renault's Supercinq platform with transverse mounting. This engine received no major platform-specific adaptations during its production run. All applications are documented in OEM technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, typically near the gearbox flange (Renault RTM-B1B). The code "B1B 707" is clearly marked. Visually, it can be identified by its single camshaft cover and the presence of either a carburetor (early) or a throttle body with a single injector (later SPI models). Differentiate from the larger C1J engine by its smaller displacement and simpler cylinder head design. Service parts for the B1B 707 are specific and not interchangeable with other engine families.
The B1B 707's primary reliability risk is timing belt tensioner failure, with elevated incidence in vehicles with neglected maintenance. Renault internal service data indicates this is the most common cause of timing belt-related breakdowns, while its failure often leads to expensive engine damage. Adherence to the 80,000 km belt and tensioner replacement interval is critical for preventing catastrophic failure.
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 B1B-707.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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