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HOMESERVICE MANUALSCHEVROLET2005OPTRA5 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCHARGING SYSTEMSENGINE ELECTRICALDIAGNOSTIC INFORMATION AND PROCEDURESSTARTER MOTOR NOISE DIAGNOSIS
2005 Chevrolet Optra5 Base, Standard

Starter Motor Noise Diagnosis

2005 Chevrolet Optra5 Base, StandardSECTION Starter Motor Noise Diagnosis
Step Action Yes No
1 Did you review the Battery Description and Operation , the Starting System Description and Operation  and the Charging System Description and Operation  and perform the necessary inspections? Go to Step 2  Go to Symptoms - Engine Electrical 
2 Start the engine.
Does the starter operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3 Start the engine while listening to the starter motor turn. Is there a loud whoop, it may sound like a siren if the engine is revved while the starter is engaged, after the engine starts, but while the starter is still held in the engaged position? Go to Step 6  Go to Step 4 
4 Do you hear a rumble, a growl, or, in some cases, a knock as the starter is coasting down to a stop after starting the engine? Go to Step 7  Go to Step 5 
5 When the engine is cranked, do you hear a high-pitched whine after the engine cranks and starts normally? This is often diagnosed as a starter drive gear hang-in or a weak solenoid. Go to Step 9  Go to Step 7 
6 Inspect the flywheel ring gear for the following:
  • Chipped gear teeth
  • Missing gear teeth
  • Milled teeth

Is the flywheel bent, or does it have damaged teeth?		 Go to Step 8  Go to Step 9 
7
  1. Remove the starter motor. Refer to Jump Starting in Case of Emergency .
  2. Inspect the starter motor bushings and clutch gear.
Does the clutch gear have chipped or milled teeth or worn bushings?		 Go to Step 9  Go to Step 8 
8 Replace the flywheel.
Did you complete the replacement?		 Go to Step 10  -
9 Replace the starter motor. Refer to Starter Motor Replacement (1.4L/1.6L)  or Starter Motor Replacement (1.8L/2.0L) .
Did you complete the replacement?		 Go to Step 10  -
10 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 3 
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:

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