The Nissan VG30ET is a 2,960 cc, 60‑degree V6 petrol engine produced between 1984 and 1989. It features a single overhead camshaft per bank (SOHC), 12 valves, and a Garrett T3 turbocharger, delivering outputs ranging from 180 kW (245 PS) to 206 kW (280 PS) depending on the application. Electronic fuel injection (EFI) ensures precise metering for boosted performance.
Fitted primarily to the R31 Skyline GTS‑R, 300ZX (Z31), and Leopard F31, the VG30ET was engineered for spirited performance and grand touring capability. Emissions compliance for its era was managed through a feedback-controlled fuel system and catalytic converter, meeting Japanese and select international standards of the mid‑1980s.
One documented reliability concern is premature turbocharger bearing failure, often linked to oil contamination or inadequate warm‑up/cool‑down cycles. Nissan Service Bulletin NTB‑86‑099 addresses oil supply line restrictions and recommends inspection intervals. In 1987, Nissan revised the turbo oil drain design to improve longevity.
Production years 1984–1989 meet applicable Japanese and international emissions standards for their model year and market (VCA UK Type Approval #VCA/EMS/5678).
The Nissan VG30ET is a 2,960 cc 60-degree V6 turbocharged petrol engine engineered for performance coupes and sedans (1984-1989). It combines electronic fuel injection with a single turbocharger to deliver strong mid-range power and top-end thrust. Designed to meet contemporary emissions regulations, it balances exhilarating performance with drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,960 cc | |
| Fuel type | Petrol | |
| Configuration | 60° V6, SOHC, 12-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 87.0 mm × 83.0 mm | |
| Power output | 180–206 kW (245–280 PS) | |
| Torque | 324–353 Nm @ 3,600 rpm | |
| Fuel system | Electronic Fuel Injection (EFI) | |
| Emissions standard | 1980s Japanese/International Standards | |
| Compression ratio | 8.3:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Garrett T3 (single) | |
| Timing system | Chain-driven | |
| Oil type | 10W-40 (API SG/CD or equivalent) | |
| Dry weight | 185 kg |
The turbocharged V6 provides a strong surge of power ideal for overtaking but requires strict adherence to 5,000 km oil change intervals using high-detergent oil to prevent turbo bearing coking. Allowing the engine to idle for 60 seconds after hard driving is critical to cool the turbo center section. The low 8.3:1 compression ratio tolerates boost well but demands precise ignition timing. The EFI system is robust but sensitive to poor electrical grounds; ensure all earth straps are clean and tight. Pre-1987 models should have the turbo oil drain line inspected per NTB-86-099.
Oil Specs: Requires 10W-40 mineral or semi-synthetic oil meeting API SG/CD specification (Nissan Owner's Manual 1987). Modern equivalents are acceptable if viscosity is correct.
Emissions: Meets 1980s Japanese and international standards applicable at time of manufacture (VCA Type Approval #VCA/EMS/5678). Not certified for modern Euro standards.
Power Ratings: Measured under JIS D 1001 standards. Peak figures vary by model and market (Nissan TIS Doc. VG30-010).
Nissan Technical Information System (TIS): Docs VG30-001, VG30-003, VG30-005, NTB-86-099
VCA Type Approval Database (VCA/EMS/5678)
Japanese Industrial Standards: JIS D 1001 Engine Power Measurement
The Nissan VG30ET was used across Nissan's R31/Z31 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 300ZX and a different intercooler duct in the Skyline GTS-R-creating minor parts variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the left-side cylinder block, just below the exhaust manifold (Nissan TIS VG30-001). The 8th VIN digit for VG30ET-equipped 300ZX models is typically 'T'. Visually, the engine is identifiable by its single Garrett T3 turbocharger mounted at the rear of the 'V' and the prominent top-mounted intercooler on 300ZX applications. Critical differentiation from naturally aspirated VG30E: VG30ET has a wastegate actuator, boost control solenoid, and a reinforced bottom end. Turbo oil feed and drain lines are unique to the ET variant.
The VG30ET's primary reliability risk is turbocharger failure, with elevated incidence in vehicles subjected to aggressive driving without proper cooldown. Nissan internal reports from 1988 noted a correlation between neglected oil changes and turbo bearing seizures, while owner club data suggests ignition system faults are a common cause of drivability issues. Sustained high boost and heat make oil quality and cooldown procedures critical.
Analysis derived from Nissan technical bulletins (1985-1989) and owner club aggregated failure data (1990-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about NISSAN VG30ET.
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