2018 Komatsu Wa380 8 Bolt Sizes & Torque Specs
Free OEM-referenced torque and bolt specs for the 2018 Komatsu Wa380 8.
This page is the OEM-referenced fastener summary for the 2018 Komatsu Wa380 8. 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 2018 Komatsu Wa380 8, fasteners follow metric standards typical of late-model Komatsu engineering. Always confirm spec against the factory service manual before tightening safety-critical fasteners (suspension, brake, steering, head bolts).
Common fastener categories on the 2018 Komatsu Wa380 8
- 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
For 2018 model-year work: This era introduced widespread torque-to-yield (TTY) bolts on head, main, and crank pulley fasteners. TTY bolts stretch permanently when torqued and must not be reused — the spec calls for a fresh bolt every time. Always verify TTY status against the FSM before reassembly.
Tools you will need
- Metric socket set (8mm-22mm), 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 2018 Komatsu Wa380 8?
Manufacturer-specified torque values for the 2018 Komatsu Wa380 8 are in the factory service manual or owner's handbook. WhatSizeBolt sources values from manufacturer literature and verifies against community data — if we do not have this exact year listed, check the Komatsu brand page for the closest model year.
What socket size do I need for the 2018 Komatsu Wa380 8 lug nuts?
Most modern Komatsu vehicles use a 19mm or 21mm socket. Older Komatsu models from before 2000 may use a 13/16" SAE socket on certain trims. Confirm against the actual lug before purchasing aftermarket wheels.
Are the 2018 Komatsu Wa380 8 fasteners metric or SAE?
Metric is the standard for this vehicle. Most fasteners on this vehicle are metric (M6, M8, M10, M12, M14). Bring a full metric set; SAE substitutes can round the head. Bolt-head markings are the fastest way to confirm grade and material at the bench.
→ 2018 Komatsu Wa380 8 oil drain plug torque & size
All 4 2018 Komatsu Wa380 8 fastener specs
Per-bolt torque, wrench size, and thread spec for the 2018 Komatsu Wa380 8, 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 — 2018 Komatsu Wa380 8
Engine bolt-by-bolt torque for the 2018 Komatsu Wa380 8, including the long block, valve covers, and intake. For the engine, plan for a 27mm tool on a M20x1.5 stud; final torque is 43 ft-lbs (engine oil drain plug).
Tires — 2018 Komatsu Wa380 8
Tires fasteners on the 2018 Komatsu Wa380 8. Tire inflation — rear tightens to 29 PSI (2.00 bar), runs on 23.5R25 threads, located at the rear tires. The tire inflation — front is a 23.5R25 thread, torqued to 54 PSI (3.75 bar) at the front tires.
Wheel — 2018 Komatsu Wa380 8
Wheel fasteners on the 2018 Komatsu Wa380 8. The wheel hub bolt uses a 46mm drive on a M30 thread, torqued to 685 ft-lbs at the wheel.
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 2018 Komatsu Wa380 8 numbers above.
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