1971 International Harvester Scout Ii Terra Lug Nut Torque & Bolt Specs

The 1971 International Harvester Scout Ii Terra lug nut torque is 75-85 ft-lbs, tightened with a 3/4" socket. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 75-85 ft-lbs · Socket size: 3/4".

This page is the OEM-referenced fastener summary for the 1971 International Harvester Scout Ii Terra. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

For the 1971 International Harvester Scout Ii Terra, fasteners follow SAE inch standards typical of classic International Harvester engineering. Always confirm spec against the factory service manual before tightening safety-critical fasteners (suspension, brake, steering, head bolts).

Common fastener categories on the 1971 International Harvester Scout Ii Terra

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

Heads up for 1971 International Harvester Scout Ii Terra owners: Vehicles this age frequently have seized fasteners due to thread corrosion. Apply penetrating oil (PB Blaster, Kroil) 24 hours before any wrenching, and have a thread chaser on hand. Lug studs are particularly prone to thread damage at this age; if a nut spins on without engaging, the stud is stretched and must be replaced before the wheel goes back on.

Tools you will need

SAE socket set (1/4"-7/8"), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 1971 International Harvester Scout Ii Terra?

The OEM-specified lug-nut torque for the 1971 International Harvester Scout Ii Terra is 75-85 ft-lbs, using a 3/4" socket. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 1971 International Harvester Scout Ii Terra lug nuts?

The 1971 International Harvester Scout Ii Terra uses a 3/4" socket. A 6-point impact-rated socket is recommended over a 12-point chrome socket — 12-points round off lug nuts under impact-driver use.

Are the 1971 International Harvester Scout Ii Terra fasteners metric or SAE?

SAE inch is the standard for this vehicle. Most fasteners on this vehicle are SAE inch, common sizes 1/4", 5/16", 3/8", 7/16", 1/2". Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other International Harvester Scout Ii Terra years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 1971 International Harvester Scout Ii Terra oil drain plug torque & size

→ 1971 International Harvester Scout Ii Terra suspension & steering torque specs (control arm, ball joint, tie rod)

All 25 1971 International Harvester Scout Ii Terra fastener specs

Per-bolt torque, wrench size, and thread spec for the 1971 International Harvester Scout Ii Terra, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Engine — 1971 International Harvester Scout Ii Terra

Engine bolt-by-bolt torque for the 1971 International Harvester Scout Ii Terra, including the long block, valve covers, and intake. The intake manifold bolt uses a 1/2" drive, torqued to 25-30 ft-lbs at the engine. At the engine, the spark plug torques to 15-20 ft-lbs (13/16" or 5/8" drive). For the engine, plan for a 5/8" tool; final torque is 25-30 ft-lbs (oil drain plug). Spark plug (v8) tightens to 15-20 ft-lbs, takes a 13/16" or 5/8" driver, located at the engine. The valve cover bolt uses a 7/16" drive, torqued to 5-7 ft-lbs at the engine. At the engine, the engine mount bolt torques to 40-50 ft-lbs (9/16" drive). For the engine, plan for a 1/2" tool; final torque is 12-15 ft-lbs (oil pan bolt).

Suspension — 1971 International Harvester Scout Ii Terra

Suspension and chassis fastener torque for the 1971 International Harvester Scout Ii Terra — strut, control arm, and sway bar values. At the suspension, the tie rod end nut torques to 35-45 ft-lbs (11/16" drive). For the suspension, plan for a 9/16" tool; final torque is 35-45 ft-lbs (leaf spring shackle bolt). Leaf spring u-bolt tightens to 45-55 ft-lbs, takes a 9/16" driver, located at the suspension. The steering box bolt uses a 9/16" drive, torqued to 50-60 ft-lbs at the suspension. At the suspension, the drag link end nut torques to 35-45 ft-lbs (3/4" drive). For the suspension, plan for a 1/2" tool; final torque is 25-35 ft-lbs (shock absorber bolt).

Brake — 1971 International Harvester Scout Ii Terra

Brake fasteners on the 1971 International Harvester Scout Ii Terra. For the brake, plan for a 1/2" tool; final torque is 35-45 ft-lbs (brake caliper bolt). Brake drum retaining screw tightens to 10-15 ft-lbs, takes a Phillips driver, located at the brake. The wheel cylinder bolt uses a 3/8" drive, torqued to 10-12 ft-lbs at the brake. At the brake, the brake line fitting torques to 10-12 ft-lbs (3/8" or 10mm drive). For the brake, plan for a 1/2" tool; final torque is 25-35 ft-lbs (backing plate bolt).

Transmission — 1971 International Harvester Scout Ii Terra

Transmission fasteners on the 1971 International Harvester Scout Ii Terra. Transmission pan bolt tightens to 10-12 ft-lbs, takes a 7/16" driver, located at the transmission. The transfer case drain plug uses a 5/8" drive, torqued to 25-30 ft-lbs at the transmission. At the transmission, the transmission mount bolt torques to 40-50 ft-lbs (9/16" drive). For the transmission, plan for a 5/8" tool; final torque is 25-30 ft-lbs (transfer case fill plug).

Wheel — 1971 International Harvester Scout Ii Terra

Wheel fasteners on the 1971 International Harvester Scout Ii Terra. The lug nut uses a 3/4" drive, torqued to 75-85 ft-lbs at the wheel. At the wheel, the hub cap clip (N/A drive). For the wheel, plan for a N/A tool (wheel stud).

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 1971 International Harvester Scout Ii Terra numbers above.

Loading the interactive 1971 International Harvester Scout Ii Terra fastener lookup with per-bolt filtering, part links, and torque tools…