Z31 Nuts & Bolts — Thread Pitch and Torque Specs
Reference tables for Z31 (1984–1989 Nissan 300ZX) fastener specifications.
All torque values are for clean, dry threads unless noted. N/A = not applicable or spec not established.
Engine
VG30E/ET block
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m) |
Notes
|
| Main bearing cap bolts |
M11 × 1.25 |
36–43 |
49–59 |
2-stage; final 90° torque-angle optional
|
| Rod bearing cap bolts |
M9 × 1.25 |
22–27 |
30–36 |
|
| Cylinder head bolts |
M11 × 1.25 |
62–68 |
84–93 |
Cold; retorque after warmup
|
| Camshaft bearing cap bolts |
M8 × 1.25 |
13–15 |
18–20 |
|
| Rocker cover (valve cover) bolts |
M6 × 1.0 |
2.9–3.6 |
4–5 |
|
| Oil pan bolts (to block) |
M6 × 1.0 |
5–6 |
7–8 |
|
| Oil drain plug |
M14 × 1.5 |
22–29 |
29–39 |
|
| Oil filter adapter |
M20 × 1.5 |
12–15 |
16–20 |
|
| Spark plugs |
M14 × 1.25 |
14–22 |
20–30 |
|
| Crankshaft pulley bolt |
M24 × 1.5 |
159–174 |
216–235 |
|
| Flywheel / driveplate bolts |
M10 × 1.25 |
61–69 |
83–93 |
|
| Timing belt tensioner |
M8 × 1.25 |
12–15 |
16–21 |
|
| Thermostat housing |
M6 × 1.0 |
5–8 |
7–11 |
|
| Intake manifold bolts |
M8 × 1.25 |
13–15 |
18–20 |
|
| Exhaust manifold nuts |
M10 × 1.25 |
27–35 |
37–47 |
|
| Turbo-to-manifold nuts (ET) |
M10 × 1.25 |
27–35 |
37–47 |
|
| Turbo oil feed banjo bolt (ET) |
M12 × 1.25 |
12–15 |
16–21 |
|
Lubrication
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m)
|
| Oil pump bolts |
M6 × 1.0 |
5–6 |
7–8
|
| Oil pressure sender |
M16 × 1.5 |
11–18 |
15–25
|
Transmission
Manual (FS5W71C / RS5F50A)
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m)
|
| Trans-to-engine bolts |
M12 × 1.25 |
29–36 |
39–49
|
| Drain / fill plugs |
M24 × 1.5 |
22–36 |
29–49
|
| Rear mount-to-crossmember |
M10 × 1.25 |
22–29 |
30–39
|
| Shift lever retainer bolts |
M8 × 1.25 |
9–12 |
12–16
|
Automatic (RE4W03A)
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m)
|
| Trans-to-engine bolts |
M12 × 1.25 |
29–36 |
39–49
|
| Torque converter-to-flexplate |
M10 × 1.25 |
33–40 |
44–54
|
| Trans oil pan bolts |
M6 × 1.0 |
3.6–5 |
5–7
|
| Trans drain plug |
M18 × 1.5 |
22–29 |
29–39
|
Driveline
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m) |
Notes
|
| Driveshaft-to-diff flange bolts |
M10 × 1.25 |
29–36 |
39–49 |
|
| Driveshaft center bearing bracket |
M8 × 1.25 |
9–14 |
12–19 |
|
| Differential mounting bolts |
M12 × 1.25 |
40–47 |
54–64 |
|
| Axle/stub shaft nut (rear) |
M24 × 1.5 |
152–203 |
206–275 |
Stake after tightening
|
| Half-shaft-to-diff bolts |
M8 × 1.25 |
25–33 |
34–44 |
|
Brakes
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m) |
Notes
|
| Brake caliper slide pins |
M8 × 1.25 |
16–23 |
22–31 |
|
| Caliper bracket bolts (front) |
M12 × 1.25 |
53–72 |
72–97 |
|
| Caliper bracket bolts (rear) |
M10 × 1.25 |
28–38 |
38–52 |
|
| Brake rotor screws |
M6 × 1.0 |
4–7 |
5–9 |
|
| Master cylinder to booster |
M10 × 1.25 |
7–12 |
9–16 |
|
| Brake line fittings (metric) |
M10 × 1.0 |
10–13 |
14–18 |
|
| Wheel lug nuts |
M12 × 1.25 |
58–72 |
79–98 |
Conical seat
|
Suspension & steering
Front
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m) |
Notes
|
| Strut-to-knuckle pinch bolt |
M12 × 1.25 |
58–72 |
79–98 |
|
| Strut top mount nuts |
M10 × 1.25 |
22–30 |
30–40 |
|
| Lower control arm pivot bolt |
M14 × 1.5 |
69–83 |
94–113 |
Tighten at ride height
|
| Lower ball joint nut |
M12 × 1.25 |
52–64 |
70–87 |
Cotter pin
|
| Sway bar end link nuts |
M8 × 1.25 |
12–16 |
16–21 |
|
| Sway bar clamp bolts |
M8 × 1.25 |
9–12 |
12–16 |
|
| Steering rack mount bolts |
M10 × 1.25 |
29–36 |
39–49 |
|
| Tie rod end nut |
M12 × 1.25 |
22–29 |
30–39 |
Cotter pin
|
| Tie rod jam nut |
M14 × 1.5 |
58–72 |
79–98 |
|
Rear
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m) |
Notes
|
| Strut-to-knuckle bolt |
M12 × 1.25 |
58–72 |
79–98 |
|
| Strut top mount nuts |
M10 × 1.25 |
22–30 |
30–40 |
|
| Rear lower arm pivot bolts |
M14 × 1.5 |
69–83 |
94–113 |
Tighten at ride height
|
| Rear upper arm pivot bolts |
M12 × 1.25 |
47–58 |
64–78 |
|
| Rear toe arm bolts |
M14 × 1.5 |
69–83 |
94–113 |
|
| Rear sway bar end links |
M8 × 1.25 |
12–16 |
16–21 |
|
| Rear crossmember bolts |
M12 × 1.25 |
40–47 |
54–64 |
|
Body & misc.
| Location |
Thread |
Torque (lb·ft) |
Torque (N·m)
|
| Hood hinge bolts |
M8 × 1.25 |
9–14 |
12–19
|
| Seat belt anchor bolts |
M12 × 1.25 |
22–29 |
30–39
|
| Battery terminal bolts (side post) |
M5 × 0.8 |
3–4 |
4–5
|
Notes
- All values from the Z31 FSM (Factory Service Manual) unless otherwise noted.
- Torque specs assume clean, dry threads. Add ~10% for oiled threads, or consult the FSM.
- Suspension fasteners marked "tighten at ride height" must be torqued with the suspension at normal ride height (car on ground or on a lift with suspension loaded), not with wheels hanging.
- "Stake" means deform the nut flange into the shaft groove after torquing to prevent loosening.
See also
