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Thread: Why Switch bleeds off on shutdown.
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Old 6th July 2009 | 01:02
  #8 (permalink)  
SNS3Guppy
 
Joined: Oct 2005
Posts: 3,218
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From: USA
The primary reason is to exercise the valve, and verify it works. However, it also ensures more cooling air through the engine prior to shutdown and is good practice...and as others have stated, it's in the manufacturer's procedures.
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