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Date: Fri, 23 Feb 2001 10:08:18 -0500
To: lancair.list@olsusa.com
From: N295VV@aol.com (by way of Marvin Kaye <marvkaye@olsusa.com>)
Subject: Re: Crankcase Breather
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>>
It is interesting to learn that ice can form at the end of the Crankcase
Breather Hose, and cause the back pressure to blow engine seals.

Jim Frantz' suggestion to slit the hose upwind to provide for an alternate
vent area is a good one.

On the LIV, the hose terminates onto a flange welded into the exhaust pipe,
and there has been a tendency for this area to coke up because of the heat,
and to plug.  I imagine this could also cause enough back pressure to blow a
seal.  It is hard to inspect because of the flange location and angle.

I am thinking of slitting my hose a few inches upwind.  In the event of a
plug of coke, this slit will relieve back pressure.  This slit will also be
used to slide a probe down into the hose and flange to inspect for coking.

I do wonder if I do this if there will be any back pressure from the exhaust
to compromise safety?

dj 

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Please send your photos and drawings to marvkaye@olsusa.com.
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