X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 30 May 2008 09:44:46 -0400 Message-ID: X-Original-Return-Path: Received: from n27.bullet.mail.mud.yahoo.com ([68.142.206.222] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with SMTP id 2944950 for lml@lancaironline.net; Thu, 29 May 2008 20:57:37 -0400 Received: from [68.142.194.243] by n27.bullet.mail.mud.yahoo.com with NNFMP; 30 May 2008 00:54:33 -0000 Received: from [68.142.201.71] by t1.bullet.mud.yahoo.com with NNFMP; 30 May 2008 00:55:12 -0000 Received: from [127.0.0.1] by omp423.mail.mud.yahoo.com with NNFMP; 30 May 2008 00:55:12 -0000 X-Yahoo-Newman-Id: 908630.32221.bm@omp423.mail.mud.yahoo.com Received: (qmail 49554 invoked from network); 30 May 2008 00:55:12 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; b=MkxLNRTyTjnNGYkF5Clr0mQgsEvg00CsA3ZGZYtmtTuV7TG8PiUAeoUZ3Nq1e747ZzHrTVaR7g2+F0ZbZM3zSIN68et9LpQwBz8Xzo8WHFV5BPV+dOnweLZEWFA/cG4kS98E7toCbBOK+9Mv1o9IpyhJCDyBACyr7xd4nNn6VGA= ; Received: from unknown (HELO Laptop) (mcmess1919@72.177.79.141 with login) by smtp113.plus.mail.mud.yahoo.com with SMTP; 30 May 2008 00:55:12 -0000 X-YMail-OSG: nLOowUkVM1manT8fu5DqAUXyACJGzPaMmOAphmb0EFfd8Wx5nUtnMkr7ww9yJjm8SBS64Hs8bGFiJhXK0f_EBo5k3DxaXZK54Fl1Ik8sNrye9VVImZJrmnmbLWmek_h8l1o- X-Yahoo-Newman-Property: ymail-3 From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" Subject: Oil Leak X-Original-Date: Thu, 29 May 2008 19:55:12 -0500 X-Original-Message-ID: <002601c8c1ef$d1340150$739c03f0$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C8C1C5.E85DF950" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcjB79CBg2yBmXelTSOJKmu22BnH1Q== Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0027_01C8C1C5.E85DF950 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Peter, I was also running the Andair air/oil separator with the drain to a 3 oz reservoir. I took it out to see if it had anything to do with the Crankcase Pressure=OIL ON BELLY problem, it didn't. I want to use a reservoir to monitor how much oil and moisture is blowing by between oil changes. Our airport is closed for the next 4 or 5 days for maintenance so further testing is delayed. Steve _____ From: PJHWFD To: lml@lancaironline.net Sent: 5/28/2008 6:41:08 A.M. Eastern Daylight Time Subj: Re: [LML] Re: Oil leak Steve I to had oil blowby problems and ended up installing an Andair oil separator. I installed a backet on the left accessory case and drained back intoa hex bolt below the separator. This did not work and I had results similar to you. My feeling is that I was getting back flow off high pressure oil from the drain. Lancair recomended this Location. I switched the drain to the valve cover which is where Beechcraft and Cirrus loccation theirs. End off problem for me. Now using less than qt/5hrs and a clean belly. What is your separator setup? Peter Hebert -----Original Message----- From: Steve Colwell To: lml@lancaironline.net Sent: Tue, 27 May 2008 6:54 pm Subject: [LML] Re: Oil leak Michael, Tests for cowl air pressure penetrating the case have been inconclusive so far. The latest attempt to find a crankcase air leak was a very sensitive test instrument pulling vacuum on the crankcase while I hosed down every penetration point on the engine top and bottom with a high volume air compressor. The balloon and soap suds test found a very small leak where the steel tube for the rubber vent line enters the dip stick housing. JB Weld fixed that. When aluminum tape was applied to the Dipstick to Dipstick Housing, tie wraps were also used for double security during the flight test. Steve Colwell Legacy 916 505-6099 You Said: During runup and takeoff roll the manometer (tapped into the crankcase vent about the mid-point of its length) will read zero until plane has about 120 knots indicated airspeed. At 120 to 200 knots the manometer reads 4" to 5" with a MOMENTARY spike up to 14" to 20" when power is reduced in the pattern. This symptom suggests that airspeed is pressurizing the case and pushing oil out. Check the Oil filler cap for a proper gasket and for proper sealing of the gasket. ------=_NextPart_000_0027_01C8C1C5.E85DF950 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Peter,

 

I was also running the Andair air/oil separator with the = drain to a 3 oz reservoir.  I took it out to see if it had anything to do = with the Crankcase Pressure=3DOIL ON BELLY problem, it didn’t.  I want = to use a reservoir to monitor how much oil and moisture is blowing by between oil changes.  Our airport is closed for the next 4 or 5 days for = maintenance so further testing is delayed.

 

Steve

 

 

From: PJHWFD
To: lml@lancaironline.net
Sent: 5/28/2008 6:41:08 A.M. Eastern Daylight Time
Subj: Re: [LML] Re: Oil leak

 

Steve
I to had oil blowby problems and ended up installing an Andair oil separator. I installed a backet on the left accessory case and drained = back intoa hex bolt below the separator. This did not work and I had results = similar to you. My feeling is that I was getting back flow off high pressure oil = from the drain. Lancair recomended this Location. I switched the drain = to the valve cover which is where Beechcraft and Cirrus loccation theirs. End = off problem for me.  Now using less than qt/5hrs and a clean = belly.  What is your separator setup?
Peter Hebert

-----Original Message-----
From: Steve Colwell <mcmess1919@yahoo.com>
To: lml@lancaironline.net
Sent: Tue, 27 May 2008 6:54 pm
Subject: [LML] Re: Oil leak

Michael,
 
Tests for =
cowl air pressure penetrating the case have been inconclusive =
so
far. The =
latest attempt to find a crankcase air leak was a very =
sensitive
test =
instrument pulling vacuum on the crankcase while I hosed down =
every
penetration =
point on the engine top and bottom with a high volume =
air
compressor.
 
The balloon =
and soap suds test found a very small leak where the steel =
tube
for the =
rubber vent line enters the dip stick housing.  JB Weld fixed =
that.
When aluminum =
tape was applied to the Dipstick to Dipstick Housing, =
tie
wraps were =
also used for double security during the flight test. =

 
Steve =
Colwell  Legacy  916 505-6099
 
 
 
You =
Said:
 
During runup =
and takeoff roll the manometer (tapped into the crankcase =
vent
about the =
mid-point of its length) will read zero until plane has about =
120
knots =
indicated airspeed.  At 120 to 200 knots the manometer reads =
4" to 5"
with a =
MOMENTARY spike up to 14" to 20" when power is reduced in =
the
pattern.
 
This symptom =
suggests that airspeed is pressurizing the case and pushing =
oil
out. Check =
the Oil filler cap for a proper gasket and for proper sealing =
of
the =
gasket.

 =

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