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                           Engines-List Digest Archive
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                     Total Messages Posted Mon 05/21/07: 1
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Today's Message Index:
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     1. 04:04 PM - Sniffle valve  (Fiveonepw@aol.com)
 
 
 
________________________________  Message 1  _____________________________________


Time: 04:04:28 PM PST US
From: Fiveonepw@aol.com
Subject: Engines-List: Sniffle valve

I am installing a Lycoming sniffle valve (included in Vans FWF kit) to an 
Aerosport IO-360 and would like to confirm its inteded operation.  I "think" it

is basically a check valve that should open when manifold pressure is equal to

atmospheric (engine not running) to drain any fuel pooled in the sump.  Engine

running, it should close when manifold pressure drops.  The valve I have 
flows freely when blowing into the sump side, but still passes a bit of air when

blown into from the tube side, which I surmise would constitute a small vacuum

leak and possible leaner than normal operation.  

Is this normal?

Thanks-
Mark


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