The Renault J7T 762 is a 2,068 cc, inline‑four turbo‑diesel engine produced between 1987 and 1995. It features indirect injection via a pre-chamber, a single overhead camshaft (SOHC), and an electronically controlled turbocharger with wastegate. In standard applications, it delivered 72 kW (98 PS) and 200 Nm of torque, engineered for enhanced performance in executive sedans.
Fitted primarily to the Renault 25 and Safrane, the J7T 762 was designed to offer stronger acceleration and highway cruising refinement compared to its mechanically controlled predecessor. Emissions compliance for its production run was achieved through its electronic injection pump and basic exhaust aftertreatment, meeting Euro 1 standards.
A documented concern for this engine is premature failure of the turbocharger's electronic wastegate actuator, potentially leading to boost control issues. This issue, referenced in Renault Technical Note TN 91-07, is often linked to moisture ingress and electrical connector corrosion. Renault issued revised actuator units and connector seals for affected vehicles.
All production years (1987–1995) meet Euro 1 standards for passenger vehicles (VCA UK Type Approval #VCA/PV/6791).
The Renault J7T 762 is a 2,068 cc inline‑four turbo‑diesel engineered for executive sedans (1987-1995). It combines indirect injection with an electronically controlled turbocharger to deliver improved low-end response and mid-range power. Designed to meet Euro 1 standards, it balances increased performance with the mechanical simplicity of its era.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,068 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 86.0 mm × 89.0 mm | |
| Power output | 72 kW (98 PS) | |
| Torque | 200 Nm @ 2,500 rpm | |
| Fuel system | Indirect injection, Bosch VE rotary pump with electronic control | |
| Emissions standard | Euro 1 | |
| Compression ratio | 22.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Electronically controlled turbo with wastegate (Garrett) | |
| Timing system | Chain-driven | |
| Oil type | SAE 15W‑40 mineral oil | |
| Dry weight | 190 kg |
The electronically controlled turbo provides sharper throttle response but requires vigilance against moisture damage to the wastegate actuator per TN 91-07. The timing chain is robust but should be inspected at 200,000 km. Using a quality 15W-40 mineral oil and changing it every 10,000 km is critical for longevity. The electronic injection pump is sensitive to voltage fluctuations; a healthy battery and charging system are essential. Replacement actuators must be the revised, sealed type.
Oil Specs: Requires SAE 15W-40 mineral oil specification (Renault Owner's Manual 1990).
Emissions: Euro 1 certification applies to all model years (1987-1995) for passenger vehicles (VCA Type Approval #VCA/PV/6791).
Power Ratings: Measured under ISO 1585 standards. Output is consistent across specified model range (Renault TIS Doc. R-MECH-0615).
Renault Technical Information System (TIS): Docs R-MECH-0601, R-MECH-0605, TN 91-07
VCA Type Approval Database (VCA/PV/6791)
ISO 1585: Road vehicles — Engine test code — Net power
The Renault J7T 762 was used across Renault's executive platforms with longitudinal mounting. This engine received platform-specific adaptations-unique engine mounts and exhaust manifolds for the Renault 25-and was also fitted to the succeeding Safrane model, creating a direct lineage. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat machined surface on the front of the cylinder block, near the injection pump (Renault TIS R-MECH-0600). The 8th digit of the VIN is 'J' for this engine family. Visually, it can be identified by its cast-iron block, prominent Bosch VE injection pump on the driver's side, and the Garrett turbocharger with an electronic actuator mounted on the compressor housing. Critical differentiation from the J7T 714: The J7T 762 has an electronic wastegate actuator and associated wiring harness. The injection pump is also electronically controlled.
The J7T 762's primary reliability risk is failure of the turbocharger's electronic wastegate actuator, with elevated incidence in humid climates or vehicles with poor under-hood sealing. Renault internal service reports from the early 1990s indicated a correlation between actuator failures and connector corrosion. Replacing the actuator with the revised sealed unit is the definitive fix.
Analysis derived from Renault technical bulletins (1987-1995) and historical workshop data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT J7T-762.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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