Editing Z31/Nuts and Bolts (section)

== Unverified — not yet found in FSM ==

<div style="border:2px solid #c00; padding:0.5em 1em; background:#fff4f4;">
'''Warning: unverified.''' These values were on the first version of this page (2026-05-17), which was generated by a bot without citations. None of them has been found in the 1987 FSM or in the measured-size sources. They are kept here only so nothing disappears silently. '''Do not use them''' until someone confirms them against a source and moves them into the tables above with a citation. Old values that the FSM or the measured list contradicted have been replaced above and are not repeated here.
</div>

{| class="wikitable sortable"
|-
! Location (as originally listed) !! Thread (unverified) !! Torque (unverified) !! Status
|-
| Main bearing cap bolts || M11 × 1.25 || — || Thread not in any source. FSM torque is given above.
|-
| Connecting rod cap bolts || M9 × 1.25 || — || Thread not in any source
|-
| Cylinder head bolts || M11 × 1.25 || — || Thread not in any source
|-
| Camshaft bearing cap bolts || M8 × 1.25 || 13–15 lb·ft / 18–20 N·m || No camshaft bearing cap entry in FSM 1987 EM S.D.S. (the VG30E is SOHC with rocker shafts; see the rocker shaft row above)
|-
| Rocker cover bolts || M6 × 1.0 || — || Thread not in any source
|-
| Oil drain plug || M14 × 1.5 || — || Thread not in any source
|-
| Oil filter adapter || M20 × 1.5 || 12–15 lb·ft / 16–20 N·m || FSM lists "oil filter bracket" and "oil filter stud" instead (above); "adapter" value not found
|-
| Spark plugs || M14 × 1.25 || — || Thread not in any source
|-
| Intake manifold bolts || M8 × 1.25 || — || Thread not in any source
|-
| Turbo-to-manifold nuts (ET) || M10 × 1.25 || — || Thread not in any source
|-
| Turbo oil feed banjo bolt (ET) || M12 × 1.25 || 12–15 lb·ft / 16–21 N·m || FSM gives "oil feed tube" 15–20 N·m (above); a banjo bolt value was not found
|-
| Manual trans-to-engine bolts || M12 × 1.25 || — || Thread not in any source
|-
| Manual trans drain/fill plugs || M24 × 1.5 || — || Thread not in any source
|-
| Manual trans rear mount-to-crossmember || M10 × 1.25 || — || Thread not in any source. The 1986 FSM torque is given above.
|-
| Shift lever retainer bolts || M8 × 1.25 || 9–12 lb·ft / 12–16 N·m || Not found
|-
| Automatic trans drain plug || M18 × 1.5 || 22–29 lb·ft / 29–39 N·m || Not found in FSM AT S.D.S.
|-
| Torque converter-to-drive plate / converter housing bolts || M10 × 1.25 / M12 × 1.25 || — || Threads not in any source
|-
| Driveshaft center bearing bracket || M8 × 1.25 || 9–14 lb·ft / 12–19 N·m || Not found in FSM PD
|-
| Rear axle/stub shaft nut || M24 × 1.5 || — || Thread not in any source. The old note "stake after tightening" was not found for this nut (FSM RA-9 staking applies to the drive shaft serration).
|-
| Half-shaft-to-diff bolts || M8 × 1.25 || — || Thread not in any source
|-
| Brake caliper slide pins || M8 × 1.25 || — || Thread not in any source
|-
| Rear caliper bracket bolts || M10 × 1.25 || — || Thread not in any source
|-
| Brake rotor screws || M6 × 1.0 || 4–7 lb·ft / 5–9 N·m || Not found
|-
| Master cylinder to booster || M10 × 1.25 || — || Thread not in any source
|-
| Brake line fittings || M10 × 1.0 || — || Thread not in any source
|-
| Front strut top mount nuts || M10 × 1.25 || — || Thread not in any source
|-
| Front lower control arm pivot bolt || M14 × 1.5 || — || Thread not in any source
|-
| Lower ball joint nut || M12 × 1.25 || — || Thread not in any source; old note "cotter pin" not checked
|-
| Front sway bar end link / clamp bolts || M8 × 1.25 || — || Threads not in any source
|-
| Tie rod jam nut || M14 × 1.5 || — || Thread not in any source
|-
| Rear "strut-to-knuckle bolt" || M12 × 1.25 || 58–72 lb·ft / 79–98 N·m || No such entry in FSM RA (the Z31 rear uses shock absorbers and semi-trailing suspension arms)
|-
| Rear strut top mount nuts || M10 × 1.25 || 22–30 lb·ft / 30–40 N·m || No such entry in FSM RA
|-
| Rear lower arm pivot bolts || M14 × 1.5 || — || Thread not in any source. The FSM torque for the suspension arm pivot is given above.
|-
| Rear upper arm pivot bolts || M12 × 1.25 || 47–58 lb·ft / 64–78 N·m || No upper arm in FSM RA
|-
| Rear toe arm bolts || M14 × 1.5 || 69–83 lb·ft / 94–113 N·m || No toe arm in FSM RA
|-
| Rear sway bar end links || M8 × 1.25 || — || Thread not in any source
|-
| Rear crossmember bolts || M12 × 1.25 || 40–47 lb·ft / 54–64 N·m || Not found as a separate entry
|-
| Hood hinge bolts || M8 × 1.25 || 9–14 lb·ft / 12–19 N·m || Not found in FSM BF
|-
| Seat belt anchor bolts || M12 × 1.25 || — || Thread not in any source (FSM rear anchor torque is given above)
|-
| Battery terminal bolts (side post) || M5 × 0.8 || 3–4 lb·ft / 4–5 N·m || Not found
|-
| General note: "add ~10% for oiled threads" || — || — || Not found in FSM. The FSM instead says to oil specific fasteners where required (e.g. connecting rod nuts, EM-32).
|}

[[Category:Z31]]
[[Category:Reference]]
[[Category:Maintenance]]