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Visual/physical Inspection Cadillac ELR I

Mechanical
  1. Inspect for aftermarket devices which could affect the operation of the engine.
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
  3. Inspect for the correct oil level, proper oil viscosity, and correct filter application.
  4. Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, ambient temperature, engine temperature, amount of engine warm-up time, and other specifics.
  5. Compare the engine sounds, if applicable, to a known good engine and make sure you are not trying to correct a normal condition.

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