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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
• 3D / STL / 2D models — printable parts & fabrication files
• 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):

• xenonzcar.com — XenonZcar Z31 reference section
• z31.info — Z31.info home (SPA; see imported content)
• z31performance.com — vBulletin forum archive
• extras archive — miscellaneous mirrored sites
• garymolitor.com — Gary Molitor's Z31 art & reference
• z31.com — z31.com reference
• z31world.wordpress.com — Z31 World blog
• msextra.com — MegaSquirt ECU reference (MS1/MS2/MS3)
• forums.hybridz.org — HybridZ forum (Z31/Z32 engine swaps)
• ziptied.com — Z-car technical guides

Getting started

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