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A/C Compressor Shaft Seal Leak Detection with J-39400-A

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Blow compressed air into the following locations for at least 15 seconds:
    • Behind the A/C compressor clutch/pulley
    • In front of the A/C compressor clutch/pulley
  2. Wait 1-2 minutes.
  3. Probe the area in front of the pulley.
  4. Probe the area behind the pulley.
  5. A solid alarm from the detector indicates a leak.
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