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| VG30ET || 87 mm × 83 mm || 7.8:1 || V6 SOHC 12-valve + IHI turbo | | VG30ET || 87 mm × 83 mm || 7.8:1 || V6 SOHC 12-valve + IHI turbo | ||
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| VG30ET (W series) || 87 mm × 83 mm || 8.3:1 || V6 SOHC 12-valve + T25 watercooled turbo | | VG30ET (W series) || 87 mm × 83 mm || 8.3:1 || V6 SOHC 12-valve + T25 watercooled turbo | ||
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Revision as of 03:50, 17 May 2026
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Welcome to the Z31 Library — a community-maintained reference for the Nissan 300ZX (Z31, 1984–1989). |
Z31 quick reference
| Engine specs | |||
|---|---|---|---|
| Engine | Displacement | Power (US) | Torque (US) |
| VG30E (N/A) | 2,960 cc (3.0 L) | 160 hp @ 5,200 rpm | 174 lb·ft @ 4,000 rpm |
| VG30ET (turbo) | 2,960 cc (3.0 L) | 200 hp @ 5,200 rpm | 227 lb·ft @ 3,600 rpm |
| Engine internal specs | |||
|---|---|---|---|
| Engine | Bore × Stroke | Compression | Configuration |
| VG30E | 87 mm × 83 mm | 9.0:1 | V6 SOHC 12-valve |
| VG30ET | 87 mm × 83 mm | 7.8:1 | V6 SOHC 12-valve + IHI turbo |
| VG30ET (W series) | 87 mm × 83 mm | 8.3:1 | V6 SOHC 12-valve + T25 watercooled turbo |
Oil change
| Engine | Filter | Capacity (w/ filter) | Recommended viscosity |
|---|---|---|---|
| VG30E | Nissan 15208-43G00 (or equivalent) | 3.75 qt (3.6 L) | 10W-30 (factory) · 5W-30 acceptable |
| VG30ET | Nissan 15208-43G00 (or equivalent) | 3.75 qt (3.6 L) | 10W-30 (factory) · 5W-30 acceptable |
- Change interval: every 3,000 mi (conventional) or 5,000 mi (synthetic)
- Drain plug torque: 22–29 lb·ft (29–39 N·m)
Transmission fluid
| Trans | Type | Capacity |
|---|---|---|
| FS5W71C (5-speed MT) | GL-4 MTF (75W-90 or 80W-90) | 2.5 qt (2.4 L) |
| RS5F50A (5-speed MT, 1988–89 N/A) | GL-4 MTF (75W-90) | 2.4 qt (2.3 L) |
| RE4W03A (4-speed AT) | Dexron II/III ATF | 7.4 qt total (3.2 qt service fill) |
Coolant
- System capacity: ~8.5 qt (8.1 L)
- Factory spec: 50/50 green ethylene-glycol coolant
- Thermostat opens: 82 °C (180 °F)
Spark plugs
| Engine | OEM plug | Gap |
|---|---|---|
| VG30E | NGK BKR5E-11 / Nissan 22401-01P15 | 1.1 mm (0.043 in) |
| VG30ET | NGK BKR6E-11 / Nissan 22401-01P16 | 1.1 mm (0.043 in) |
Timing belt
- Replacement interval: 60,000 mi (96,000 km)
- See Timing belt replacement for full procedure
Tire sizes (stock)
| Year | Front | Rear |
|---|---|---|
| 1984–1985 | 205/60R15 | 225/50R15 |
| 1986–1989 | 205/60R15 | 225/50R15 |
| 1987–1989 2+2 | 205/60R15 | 225/50R15 |
- Factory rim: 15 × 6.5 JJ (front), 15 × 7.0 JJ (rear)
Z31 reference
- Z31 — Z31 hub page
- Z31 reference index — full XenonZcar Z31 reference
- Z31 basics · Common issues & fixes · Modifications
- Factory Service Manuals (FSM) · Owner's manuals
- Nuts & bolts — thread pitch, torque specs
- Browse all imported XenonZcar pages
Related Z-car content
- S30 — 240Z / 260Z / 280Z (1970–1978)
- S130 — 280ZX (1979–1983), predecessor
- Z32 — 300ZX (1990–2000), successor
Forums
- z31performance.com archive — Sept 2024 import, ~2762 threads organized by category
- Forums landing — all forum archives
Static site archives
Browse the original sites as they appeared (untouched HTML mirrors):