The Renault G8T 706 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 1999 and 2005. It features indirect injection via a pre — chamber system, a fixed — geometry turbocharger, and a single overhead camshaft (SOHC). In standard form, it delivers 85 kW (115 PS) and 270 Nm of torque, providing dependable low — rpm pulling power for its era.
Fitted to models such as the Laguna II, Espace III, and Master II van, the G8T 706 was engineered for durability and cost — effect…
Production years 1999–2005 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/2345).
The Renault G8T 706 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size and commercial vehicles (1999-2005). It combines indirect injection with a fixed‑geometry turbocharger to deliver robust low‑rpm torque and straightforward mechanical operation. Designed to meet Euro 3 standards, it prioritizes durability over refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,188 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 94.4 mm | |
Power output | 85 kW (115 PS) | |
Torque | 270 Nm @ 2,000 rpm | |
Fuel system | Indirect injection (pre-chamber), Bosch VP44 rotary pump | |
Emissions standard | Euro 3 | |
Compression ratio | 18.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Fixed-geometry turbo (Garrett), vacuum actuator | |
Timing system | Belt | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 165 kg |
The Renault G8T 706 was used across Renault's B/C platforms with transverse mounting and in light commercial applications. This engine received platform-specific adaptations-reinforced ancillary brackets in the Master and revised engine mounts in the Espace-but no major facelift revisions occurred during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The G8T 706's primary reliability risk is timing belt failure, with catastrophic consequences due to its interference design. Renault workshop data indicates belt-related engine seizures as a leading cause of major repairs for this engine, while UK DVSA data shows EGR valve faults as a common MOT advisory item. Neglecting the 10,000 km belt replacement interval and using incorrect oil specifications accelerate wear on the injection pump and turbo actuator, making adherence to service schedules critical.
Analysis derived from Renault technical bulletins (1999-2005) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The G8T 706 is mechanically robust and known for its torque, but its Achilles' heel is the timing belt. If the 10,000 km replacement interval is strictly adhered to, it can be very reliable. Other common issues like the turbo actuator and EGR valve are relatively inexpensive to fix. Regular maintenance is non-negotiable for longevity.
The most critical issue is timing belt failure, which destroys the engine. Other frequent problems include turbo wastegate actuator diaphragm failure, EGR valve clogging, and injection pump timing issues. These are well-documented in Renault service bulletins and are common for indirect injection diesels of this era.
The G8T 706 2.2 dTi 115 engine was primarily used in the Renault Laguna II (2001-2005), Espace III (2000-2003), Master II van (1999-2003), and early Trafic II models (2001-2004, before the switch to common rail dCi).
Yes, but with significant caveats. The Bosch VP44 pump can be recalibrated for more fuel, and a boost controller can manage the turbo. However, gains are modest (10-15%), and the engine's indirect injection and fixed turbo limit potential. Aggressive tuning risks damaging the injection pump or head gasket.
Official combined figures are around 7.5 L/100km (38 mpg UK). Real-world consumption typically ranges from 8.5-10.0 L/100km (28-33 mpg UK) in mixed driving, depending on the vehicle (Laguna vs. Master van) and load. Highway cruising can yield around 6.5 L/100km (43 mpg UK).
Yes. The G8T 706 is an interference engine. If the timing belt fails or jumps, the pistons will collide with the open valves, causing severe and often terminal engine damage. This makes the 10,000 km belt replacement interval absolutely critical.
Renault specifies a 10W-40 mineral or semi-synthetic oil meeting the RN0700 standard for this engine. Using the correct viscosity is important for protecting the timing belt tensioner and injection pump. Adhere to 15,000 km (or annual) change intervals.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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