Editing Main Page (section)

== Z31 quick reference ==

{| class="wikitable" style="width:100%"
! colspan="4" | Engine specs
|-
! Engine !! Displacement !! Power (US) !! Torque (US)
|-
| VG30E (N/A) || 2,960 cc (180.62 cu in) || 160 hp @ 5,200 rpm (165 hp on late W-series, 1988–1989) || 173 lb·ft @ 4,000 rpm
|-
| VG30ET (turbo, 1984 – 5/1987) || 2,960 cc (180.62 cu in) || 200 hp @ 5,200 rpm || 227 lb·ft @ 3,600 rpm
|-
| VG30ET (turbo, W-series, 5/1987 – 1989) || 2,960 cc (180.62 cu in) || 205 hp @ 5,200 rpm || 227 lb·ft @ 3,600 rpm
|}

{| class="wikitable" style="width:100%"
! colspan="4" | Engine internal specs
|-
! Engine !! Bore × Stroke !! Compression !! Configuration
|-
| VG30E || 87 mm × 83 mm || 9.0:1 || V-6 OHC
|-
| VG30ET || 87 mm × 83 mm || 7.8:1 || V-6 OHC + Nissan-made Garrett-based T3 turbo
|-
| VG30ET (W series, 5/1987 – 1989) || 87 mm × 83 mm || 8.3:1 || V-6 OHC + Nissan-made Garrett-based T25 turbo
|}

=== Oil change ===

{| class="wikitable"
|-
! Engine !! Capacity (w/ filter) !! Capacity (w/o filter) !! Recommended viscosity
|-
| VG30E || 4.0 L (4-1/4 US qt) || 3.6 L (3-7/8 US qt) || 10W-30 (preferred above −18 °C / 0 °F)
|-
| VG30ET || 4.0 L (4-1/4 US qt) || 3.6 L (3-7/8 US qt) || 10W-30 (preferred above −18 °C / 0 °F)
|}

* Change interval: VG30E every 7,500 mi (12,000 km) or 6 months; VG30ET every 5,000 mi (8,000 km) or 6 months; filter every second oil change
* Drain plug torque: 22–29 lb·ft (29–39 N·m)

=== Transmission fluid ===

{| class="wikitable"
|-
! Trans !! Type !! Capacity
|-
| FS5W71C (5-speed MT) || API GL-4, 75W-90 (non-turbo) || 1.9 L (4 US pt) (1986); 2.0 L (4-1/4 US pt) (1987)
|-
| FS5R90A / BW T-5 (5-speed MT, 1986 turbo) || API GL-4, 80W-90 (turbo) || 1.9 L (4 US pt)
|-
| FS5R30A (5-speed MT, 1987 turbo) || API GL-4, 80W-90 (turbo) || 2.4 L (5-1/8 US pt)
|-
| E4N71B (4-speed AT) || Type DEXRON ATF || 7.0 L (7-3/8 US qt)
|}

=== Coolant ===

* System capacity (without reservoir): VG30E 10.5 L (11-1/8 US qt); VG30ET 11.0 L (11-5/8 US qt); reservoir tank 0.8 L (7/8 US qt)
* Anti-freeze: ethylene-glycol base
* Thermostat opens: 76.5 °C (170 °F)

=== Spark plugs ===

{| class="wikitable"
|-
! Engine !! OEM plug (standard type) !! Gap
|-
| VG30E || BCPR6ES-11 || 1.0–1.1 mm (0.039–0.043 in)
|-
| VG30ET || BCPR6E-11 || 1.0–1.1 mm (0.039–0.043 in)
|}

=== Timing belt ===

* Replacement interval: 60,000 mi (96,000 km)
* See [[Z31/timingbelt php|Timing belt replacement]] for full procedure

=== Tire sizes (stock) ===

{| class="wikitable"
|-
! Model (1986–1987) !! Front !! Rear
|-
| VG30E (N/A) || P215/60R15 90H || P215/60R15 90H
|-
| VG30ET (turbo) || 225/50VR16 || 225/50VR16
|}

* Factory rim: 15 × 6-1/2 JJ (VG30E), 16 × 7 JJ (VG30ET)

<small>Specs from the 1986/1987 FSMs (EM, GI, LC, MA sections; see [[Z31/Nuts and Bolts#How to verify|How to verify]]); power figures and W-series data from xenonzcar ([[Z31/engines php|engine specs]], [[Z31/GeneralSpecs php|general specs]], [[Z31/Wseriesmain php|W-series]]). Other 1984–85 and 1988–89 values may differ.</small>