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Message-ID: <1c23473f050924114314cde553@mail.gmail.com>
Date: Sat, 24 Sep 2005 11:43:30 -0700
From: David Leonard <wdleonard@gmail.com>
Reply-To: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: pressure in the crank-case
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After a flight a few days ago I found I big oil leak. After taking off the
cowl I found that the silicone holding part of the oil filler in place had
come loose and the oil fill cap had come off. Easy I think....
 So I fix the oil filler stem but on a ground run there is now oil coming
out of the turbo. If I take the oil filler cap off, oil stops coming out of
the turbo. So something is pressurizing the crank-case. Engine is running
fine otherwise. The crank case vent is not plugged (but is too small to let
out large amounts of gas). The oil does not appear to have water in it, so
it seems to be either compression or exhaust gas that is getting in.
 What causes that? A blown side seal? Busted turbo seal? The turbo still
seems to be making good boost. Other ideas?
 I fear it may be time for a rebuild. Anyone know of a pair of high
compression second gen rotors available? That is all I need to have what I
need for my rebuild.

--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html

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<div>After a flight a few days ago I found I big oil leak.&nbsp; After taki=
ng off the cowl I found that the silicone holding part of the oil filler in=
 place had come loose and the oil fill cap had come off.&nbsp; Easy I think=
....</div>

<div>&nbsp;</div>
<div>So I fix the oil filler stem but on a ground run there is now oil comi=
ng out of the turbo.&nbsp;&nbsp; If I take the oil filler cap off, oil stop=
s coming out of the turbo.&nbsp; So something is pressurizing the crank-cas=
e.&nbsp; Engine is running fine otherwise.&nbsp; The crank case vent is not=
 plugged (but is too small to let out large amounts of gas).&nbsp; The oil =
does not appear to have water in it, so it seems to be either compression o=
r exhaust gas that is getting in.
</div>
<div>&nbsp;</div>
<div>What causes that?&nbsp;&nbsp;A blown side seal?&nbsp; Busted turbo sea=
l?&nbsp; The turbo still seems to be making good boost. &nbsp;Other ideas?&=
nbsp; </div>
<div>&nbsp;</div>
<div>I fear it may be time for a rebuild.&nbsp; Anyone know of a pair of hi=
gh compression second gen rotors available?&nbsp; That is all I need to hav=
e what I need for my rebuild.<br clear=3D"all"><br>-- <br>Dave Leonard<br>T=
urbo Rotary RV-6 N4VY
<br><a href=3D"http://members.aol.com/_ht_a/rotaryroster/index.html">http:/=
/members.aol.com/_ht_a/rotaryroster/index.html</a><br><a href=3D"http://mem=
bers.aol.com/_ht_a/vp4skydoc/index.html">http://members.aol.com/_ht_a/vp4sk=
ydoc/index.html
</a> </div>

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