Chevrolet Cobalt Service & Repair Manual: Wheel Lug Stud, Replace

Suspension fasteners are critical components because they affect performance of vital components and systems and their failure may result in major service expense. New components must be installed with the same component numbers or equivalent components, if replacement is required. Do not use a replacement component of lesser quality or substitute design. Tightening values must be used as specified during reassembly to ensure correct retention of these components.
Use washers that have an ID that is larger than the OD of the wheel stud serrations. Use enough washers (approximately four) to allow the wheel stud to fully seat against the hub flange.
Some models may require a suitable press to remove studs instead of C-Frame and screw Installer/Remover.
1. Remove wheel and tire as outlined in "Wheel, Replace."
2. On models equipped with caliper anchor plate, remove anchor plate bolts and position brake caliper and anchor plate assembly aside.
3. On models without caliper anchor plate, remove caliper bolts and position brake caliper assembly aside.
4. On all models, support brake caliper assembly using mechanics wire, or equivalent. Do not allow brake caliper and anchor plate assembly to hang from brake hose or damage to hose may result.
5. Remove brake disc/wheel hub as equipped.
6. Remove wheel stud using C-Frame and screw Installer/Remover, or equivalent.
7. Reverse procedure to install, note following:
  a. Position new wheel stud in wheel hub, aligning serrations in wheel hub flange made by original wheel stud.
  b. Place approximately four washers over outside end of wheel stud and thread a standard wheel nut onto wheel stud with flat side against washers.
  c. Tighten wheel nut until wheel stud head seats against back side of wheel hub flange.
  d. Remove and discard wheel nut and washers.
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