2018 Chevrolet Spark Lug Nut Torque & Bolt Specs

The 2018 Chevrolet Spark lug nut torque is 100 ft-lbs (136 Nm), tightened with a 17mm 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: 100 ft-lbs (136 Nm) · Socket size: 17mm · Thread: M12x1.5.

This page is the OEM-referenced fastener summary for the 2018 Chevrolet Spark. 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.

GM lug-nut torque clusters around 140 ft-lbs (190 Nm) for half-ton Silverado/Sierra and 100 ft-lbs for passenger cars like Malibu, Impala, and Cruze. GM heavy-duty trucks (2500HD/3500HD) jump to 165 ft-lbs. Most GM passenger cars use a 19mm socket; trucks moved from 22mm to 22mm-with-deep-well in 2014. Watch for GM's flat-flange lug nut design on the Silverado — the standard cone-seat aftermarket lugs will not seat correctly.

Common fastener categories on the 2018 Chevrolet Spark

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 Chevrolet Spark?

The OEM-specified lug-nut torque for the 2018 Chevrolet Spark is 100 ft-lbs (136 Nm), using a 17mm 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 Chevrolet Spark lug nuts?

The 2018 Chevrolet Spark uses a 17mm 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 Chevrolet Spark 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 Chevrolet Spark years

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

→ 2018 Chevrolet Spark oil drain plug torque & size

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

All 40 2018 Chevrolet Spark fastener specs

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

Brakes — 2018 Chevrolet Spark

Brake fasteners on the 2018 Chevrolet Spark — caliper bracket, slide pins, and banjo bolt torque follow. At the front, the front caliper slide pin bolt torques to 26 ft-lbs (35 Nm) (13mm drive, M8x1.25 thread). For the front, plan for a 18mm tool on a M12x1.5 stud; final torque is 85 ft-lbs (115 Nm) (front caliper bracket bolt). Abs sensor bolt tightens to 71 in-lbs (8 Nm), takes a 8mm driver, runs on M6x1.0 threads. The rear caliper bracket bolt uses a 10mm drive on a M8x1.25 thread, torqued to 22 ft-lbs (30 Nm) at the rear. The rear drum backing plate bolt torques to 37 ft-lbs (50 Nm) (15mm drive, M10x1.5 thread). plan for a 10mm tool on a M8x1.25 stud; final torque is 11 ft-lbs (15 Nm) (rear wheel cylinder bolt).

Engine — 2018 Chevrolet Spark

Engine bolt-by-bolt torque for the 2018 Chevrolet Spark, including the long block, valve covers, and intake. plan for a 8mm tool on a M6x1.0 stud; final torque is 89 in-lbs (10 Nm) (throttle body bolt). Coolant reservoir bolt tightens to 18 ft-lbs (24 Nm), takes a 10mm driver, runs on M8x1.25 threads. The exhaust manifold bolt uses a 13mm drive on a M8x1.25 thread, torqued to 11 ft-lbs (15 Nm). The crankshaft pulley bolt torques to 74 ft-lbs + 45° turn (19mm drive, M12x1.25 thread). plan for a 8mm tool on a M6x1.0 stud; final torque is 71 in-lbs (8 Nm) (valve cover bolt). Water pump bolt tightens to 18 ft-lbs (24 Nm), takes a 10mm driver, runs on M8x1.25 threads. The intake manifold bolt uses a 10mm drive on a M8x1.25 thread, torqued to 16 ft-lbs (22 Nm). The engine mount through bolt torques to 41 ft-lbs (56 Nm) (15mm drive, M10x1.5 thread). plan for a 15mm tool on a M12x1.75 stud; final torque is 18 ft-lbs (25 Nm) (oil drain plug). Oil pan bolt tightens to 89 in-lbs (10 Nm), takes a 8mm driver, runs on M6x1.0 threads.

Suspension — 2018 Chevrolet Spark

Suspension and chassis fastener torque for the 2018 Chevrolet Spark — strut, control arm, and sway bar values. Front shock lower bolt tightens to 81 ft-lbs (110 Nm), takes a 19mm driver, runs on M12x1.25 threads. The lower control arm bolt uses a 19mm drive on a M12x1.5 thread, torqued to 85 ft-lbs (115 Nm). The rear axle beam bolt torques to 74 ft-lbs (100 Nm) (18mm drive, M12x1.75 thread). plan for a 13mm tool on a M8x1.25 stud; final torque is 37 ft-lbs (50 Nm) (sway bar link nut). Tie rod end nut tightens to 44 ft-lbs (60 Nm), takes a 17mm driver, runs on M10x1.5 threads. The strut-to-knuckle bolt uses a 17mm drive on a M12x1.25 thread, torqued to 81 ft-lbs (110 Nm). The strut mount nut torques to 37 ft-lbs (50 Nm) (17mm drive, M12x1.25 thread). plan for a 19mm tool on a M12x1.5 stud; final torque is 85 ft-lbs (115 Nm) (rear trailing arm bolt). Wheel hub bearing bolt tightens to 48 ft-lbs (65 Nm), takes a 13mm driver, runs on M8x1.25 threads.

Steering — 2018 Chevrolet Spark

Steering linkage fasteners on the 2018 Chevrolet Spark. The steering rack mount bolt uses a 15mm drive on a M10x1.5 thread, torqued to 41 ft-lbs (56 Nm). The power steering pump bolt torques to 18 ft-lbs (24 Nm) (13mm drive, M8x1.25 thread). plan for a 15mm tool on a M10x1.5 stud; final torque is 18 ft-lbs (24 Nm) (steering intermediate shaft pinch bolt).

Body — 2018 Chevrolet Spark

Body fasteners on the 2018 Chevrolet Spark. The hood hinge bolt torques to 18 ft-lbs (24 Nm) (13mm drive, M8x1.25 thread). plan for a 15mm tool on a M10x1.5 stud; final torque is 37 ft-lbs (50 Nm) (seat belt anchor bolt).

Exhaust — 2018 Chevrolet Spark

Exhaust fasteners on the 2018 Chevrolet Spark. plan for a 22mm tool on a M18x1.5 stud; final torque is 30 ft-lbs (41 Nm) (o2 sensor). Exhaust pipe flange bolt tightens to 15 ft-lbs (20 Nm), takes a 13mm driver, runs on M8x1.25 threads.

Electrical — 2018 Chevrolet Spark

Electrical fasteners on the 2018 Chevrolet Spark. Battery hold-down bolt tightens to 15 ft-lbs (20 Nm), takes a 10mm driver, runs on M8x1.25 threads. The battery terminal bolt uses a 8mm drive on a M6x1.0 thread, torqued to 53 in-lbs (6 Nm).

Transmission — 2018 Chevrolet Spark

Transmission fasteners on the 2018 Chevrolet Spark. The transmission mount bolt uses a 15mm drive on a M10x1.5 thread, torqued to 35 ft-lbs (47 Nm). The transmission-to-engine bolt torques to 40 ft-lbs (54 Nm) (15mm drive, M10x1.5 thread).

Ignition — 2018 Chevrolet Spark

Ignition fasteners on the 2018 Chevrolet Spark. The spark plug torques to 15 ft-lbs (20 Nm) (5/8 in. drive, M14x1.25 thread).

Cooling — 2018 Chevrolet Spark

Cooling fasteners on the 2018 Chevrolet Spark. plan for a 10mm tool on a M8x1.25 stud; final torque is 15 ft-lbs (20 Nm) (thermostat housing bolt).

Fuel — 2018 Chevrolet Spark

Fuel fasteners on the 2018 Chevrolet Spark. Fuel tank strap bolt tightens to 18 ft-lbs (24 Nm), takes a 10mm driver, runs on M8x1.25 threads.

Wheels & Tires — 2018 Chevrolet Spark

Wheels & Tires fasteners on the 2018 Chevrolet Spark. The lug nut uses a 17mm drive on a M12x1.5 thread, torqued to 100 ft-lbs (136 Nm).

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 Chevrolet Spark numbers above.

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