2018 Kia Carnival Lug Nut Torque & Bolt Specs

The 2018 Kia Carnival lug nut torque is 87 ft-lbs, tightened with a 21mm socket on M12x1.5 studs. 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: 87 ft-lbs · Socket size: 21mm · Thread: M12x1.5.

This page is the OEM-referenced fastener summary for the 2018 Kia Carnival. 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.

Hyundai/Kia lug-nut torque is 79-88 ft-lbs on nearly all passenger models, M12x1.5 thread, 21mm socket. The Tucson, Sportage, and Santa Fe all use the same fastener spec. Hyundai's oil drain plug threads are unusually fine-pitch and strip easily — always use a torque wrench, not feel.

Common fastener categories on the 2018 Kia Carnival

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 Kia Carnival?

The OEM-specified lug-nut torque for the 2018 Kia Carnival is 87 ft-lbs, using a 21mm socket on M12x1.5 thread studs. 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 2018 Kia Carnival lug nuts?

The 2018 Kia Carnival uses a 21mm 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 2018 Kia Carnival 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.

Other Kia Carnival years

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

→ 2018 Kia Carnival oil drain plug torque & size

→ 2018 Kia Carnival suspension & steering torque specs (control arm, ball joint, tie rod)

All 36 2018 Kia Carnival fastener specs

Per-bolt torque, wrench size, and thread spec for the 2018 Kia Carnival, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Wheels — 2018 Kia Carnival

Wheel and lug nut spec for the 2018 Kia Carnival. Lug nut tightens to 87 ft-lbs, takes a 21mm driver, runs on M12x1.5 threads, located at the wheel hub.

Brakes — 2018 Kia Carnival

Brake fasteners on the 2018 Kia Carnival — caliper bracket, slide pins, and banjo bolt torque follow. The front slide pin uses a 14mm drive on a M10x1.25 thread, torqued to 22 ft-lbs at the caliper slide. At the caliper slide, the rear slide pin torques to 20 ft-lbs (14mm drive, M10x1.25 thread). For the caliper bracket, plan for a 17mm tool on a M12x1.5 stud; final torque is 58 ft-lbs (rear caliper bracket). Front caliper bracket bolt tightens to 73 ft-lbs, takes a 19mm driver, runs on M14x1.5 threads, located at the caliper bracket.

Engine — 2018 Kia Carnival

Engine bolt-by-bolt torque for the 2018 Kia Carnival, including the long block, valve covers, and intake. At the intake manifold, the intake manifold torques to 18 ft-lbs (12mm drive, M8x1.25 thread). For the oil pan, plan for a 17mm tool on a M14x1.5 stud; final torque is 29 ft-lbs (oil pan drain plug). Alternator mounting bolt tightens to 30-40 ft-lbs, runs on M10x1.25 threads. The valve cover bolt is a M6x1.0 thread, torqued to 7-10 ft-lbs. At the valve cover, the valve cover torques to 7 ft-lbs (10mm drive, M6x1.0 thread). For the exhaust manifold, plan for a 14mm tool on a M10x1.25 stud; final torque is 33 ft-lbs (exhaust manifold). Spark plug tightens to 13-17 ft-lbs, runs on M14x1.25 threads. The oil drain plug is a M14x1.5 thread, torqued to 25-33 ft-lbs.

Drivetrain — 2018 Kia Carnival

Drivetrain and driveline fasteners for the 2018 Kia Carnival — axle, transmission, and differential plugs. plan for the right driver on a M12x1.25 stud; final torque is 55-70 ft-lbs (transmission mount bolt). Axle nut front tightens to 170-200 ft-lbs, runs on M24x1.5 threads. The axle nut rear is a M24x1.5 thread, torqued to 170-200 ft-lbs.

Suspension — 2018 Kia Carnival

Suspension and chassis fastener torque for the 2018 Kia Carnival — strut, control arm, and sway bar values. Front strut top mount nut tightens to 30-40 ft-lbs, runs on M14x1.5 threads. The sway bar link uses a 14mm drive on a M10x1.25 thread, torqued to 37 ft-lbs at the sway bar link. At the strut top mount, the front strut mount torques to 40 ft-lbs (17mm drive, M12x1.5 thread). For the ball joint, plan for a 19mm tool on a M14x1.5 stud; final torque is 59 ft-lbs (ball joint). Control arm tightens to 59 ft-lbs, takes a 19mm driver, runs on M14x1.5 threads, located at the control arm. The rear shock absorber upper nut is a M12x1.25 thread, torqued to 35-45 ft-lbs. The front lower control arm rear bolt torques to 70-85 ft-lbs (M12x1.25 thread). plan for the right driver on a M12x1.25 stud; final torque is 70-85 ft-lbs (front lower control arm front bolt). Stabilizer bar link nut front tightens to 25-35 ft-lbs, runs on M10x1.25 threads. The rear shock absorber lower bolt is a M14x1.5 thread, torqued to 85-100 ft-lbs.

Steering — 2018 Kia Carnival

Steering linkage fasteners on the 2018 Kia Carnival. The tie rod end nut is a M12x1.25 thread, torqued to 25-33 ft-lbs. The power steering pump bolt torques to 22-30 ft-lbs (M10x1.25 thread). plan for the right driver on a M16x1.5 stud; final torque is 30-38 ft-lbs (steering wheel center bolt).

Body — 2018 Kia Carnival

Body fasteners on the 2018 Kia Carnival. The hood hinge bolt torques to 15-20 ft-lbs (M8x1.25 thread).

Brake — 2018 Kia Carnival

Brake fasteners on the 2018 Kia Carnival. plan for the right driver on a M10x1.25 stud; final torque is 22-30 ft-lbs (front brake caliper guide pin bolt). Rear brake caliper guide pin bolt tightens to 20-28 ft-lbs, runs on M10x1.25 threads. The rear brake caliper bracket bolt is a M12x1.25 thread, torqued to 50-65 ft-lbs. The front brake caliper bracket bolt torques to 55-70 ft-lbs (M12x1.25 thread).

Transmission — 2018 Kia Carnival

Transmission fasteners on the 2018 Kia Carnival. Trans mount tightens to 58 ft-lbs, takes a 17mm driver, runs on M12x1.5 threads, located at the transmission mount.

Wheel — 2018 Kia Carnival

Wheel fasteners on the 2018 Kia Carnival. The wheel lug nuts is a M12x1.5 thread, torqued to 80-90 ft-lbs.

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 Kia Carnival numbers above.

Loading the interactive 2018 Kia Carnival fastener lookup with per-bolt filtering, part links, and torque tools…