The Renault G8T 740 is a 2,188 cc, inline‑four turbo‑diesel engine produced between 1999 and 2005. It features indirect injection via a pre — chamber, a fixed — geometry turbocharger, and a single overhead camshaft. Output is rated at 85 kW (115 PS), with a torque figure of 270 Nm, providing adequate low — end pull for its era.
Fitted primarily to the Laguna II and Espace III, the G8T 740 was engineered for durability and cost — effective maintenance. Emissions compliance was ac…
All production years (1999–2005) meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/2345).
The Renault G8T 740 is a 2,188 cc inline‑four turbo‑diesel engineered for mid‑size models (1999-2005). It combines indirect injection with a single fixed‑geometry turbocharger to deliver adequate low‑rpm torque. Designed to meet Euro 3 standards, it prioritizes mechanical simplicity and serviceability.
| 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 (Bosch VP44 rotary pump) | |
Emissions standard | Euro 3 | |
Compression ratio | 18.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single fixed‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 165 kg |
The Renault G8T 740 was used across Renault's Laguna II and Espace III platforms with transverse mounting. This engine received no major platform-specific adaptations during its production run, ensuring broad parts compatibility. All applications are documented in OEM technical bulletins.
The G8T 740's primary reliability risk is turbocharger wastegate actuator failure, with elevated incidence in high-mileage vehicles. Renault internal reports indicated a significant failure rate for pre-2003 units, while UK DVSA records show a correlation between fuel pump issues and the use of poor-quality diesel. Neglecting basic maintenance significantly increases the risk of these failures, making adherence to service schedules critical.
Analysis derived from Renault technical bulletins (2000-2005) 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 740 is known for its mechanical simplicity and durability, making it potentially very reliable long-term. The main concerns are the turbo actuator (especially pre-2003) and the Bosch VP44 injection pump, both of which are sensitive to poor fuel quality. With regular maintenance and good diesel, these engines can easily exceed 200,000 km.
The most frequent issues are turbocharger wastegate actuator failure (causing limp mode), Bosch VP44 injection pump failure (leading to no-start), EGR valve clogging (causing rough running), and glow plug/relay failures (affecting cold starts). These are covered in Renault service documentation.
The G8T 740 was primarily used in the Renault Laguna II (1999-2005) and the Renault Espace III (2000-2003), typically badged as dTi 115. It was a key engine for these models before the widespread adoption of common rail diesel technology.
Yes, but with limitations. The most common and safest modification is an ECU remap, which can increase power to around 130-140 PS and torque to 300-320 Nm. More aggressive tuning is risky due to the age of the engine and the limitations of the fixed-geometry turbo and indirect injection system.
Fuel economy is respectable for its era. In a Laguna II dTi 115, expect around 7.5 L/100km (city) and 5.5 L/100km (highway), translating to roughly 38 mpg UK combined. Real-world figures for mixed driving in a well-maintained vehicle typically range from 35-40 mpg UK.
Yes. The G8T 740 is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the chain is very robust and rarely fails if basic maintenance is performed.
Renault specifies RN0700 10W-40 mineral or semi-synthetic oil for the G8T 740. This oil is well-suited to the engine's design and operating temperatures. Changing the oil and filter every 15,000 km (or annually) is recommended for optimal engine health and longevity.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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