Stator Test

1996 Chevrolet Corvette Base, 2D Coupe, 5.7 PSECTION Stator Test
NOTE: Install NEW bearing at slip ring end whenever generator is reassembled. When disassembling generator, carefully note locations of insulated and uninsulated screws.
  1. Scribe end frames to facilitate reassembly. Remove through-bolts and separate end frames. Remove stator lead attaching nuts and remove stator.
  2. Using ohmmeter, check for grounds between any stator lead and stator frame. See Fig 1. Ohmmeter should indicate infinite resistance. If reading is not infinity, replace stator. CS series generators are equipped with delta stator windings and cannot be checked for opens or shorts using ohmmeter. A noticeable discoloration anywhere on the stator usually indicates stator failure.
  3. To reassemble generator, reverse disassembly procedure. Retain brushes with brush retaining pin during reassembly. See Figure. Remove retaining pin after tightening through-bolts.
Fig 1: Testing CS144 Generator Stator (Corvette)
G92G21887Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.