X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 09 Aug 2008 15:35:11 -0400 Message-ID: X-Original-Return-Path: Received: from n18.bullet.mail.mud.yahoo.com ([68.142.206.145] verified) by logan.com (CommuniGate Pro SMTP 5.2.6) with SMTP id 3068792 for lml@lancaironline.net; Sat, 09 Aug 2008 12:46:14 -0400 Received: from [68.142.194.244] by n18.bullet.mail.mud.yahoo.com with NNFMP; 09 Aug 2008 16:46:09 -0000 Received: from [68.142.201.253] by t2.bullet.mud.yahoo.com with NNFMP; 09 Aug 2008 16:46:13 -0000 Received: from [127.0.0.1] by omp414.mail.mud.yahoo.com with NNFMP; 09 Aug 2008 16:46:13 -0000 X-Yahoo-Newman-Id: 517308.82183.bm@omp414.mail.mud.yahoo.com Received: (qmail 95134 invoked from network); 9 Aug 2008 16:46:13 -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:Cc:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; b=s7wWw1Ub4WN0WMtl7bt5Ju7YnVwQdFDYPpxWZIlSf1o5HEaXfG5+2UCKiQiXfdoWnaqcuKlY9H+VW1wE1LJqWcMxLmYeEqix3Z3rXxHSbjlfUxObjQciVRRfaQ1jtuxlfAQOZxa8T3psImOYG4fdL35K4jGeuFZwWnalXrs2E/g= ; Received: from unknown (HELO Laptop) (mcmess1919@24.153.224.247 with login) by smtp118.plus.mail.mud.yahoo.com with SMTP; 9 Aug 2008 16:46:12 -0000 X-YMail-OSG: 9RpMrBAVM1n_SrUWt_d7jiEKGFsNmgx8HVF2drj4fBt6wLP8uXr0EEYgyD45cv1I8NljRpdgK2sVm9xsJyuvAWiwJ4bbEU.fY9tU5mXZnHvN0NFRRFk6cKWDvLLI X-Yahoo-Newman-Property: ymail-3 From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" X-Original-Cc: References: In-Reply-To: Subject: breather tube oil leakage X-Original-Date: Sat, 9 Aug 2008 11:46:13 -0500 X-Original-Message-ID: <000f01c8fa3f$6fdfa2f0$4f9ee8d0$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01C8FA15.87099AF0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acj5j/Si+u8R81x0R3mP/ARW6uLwwgApp4IA Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0010_01C8FA15.87099AF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Abe, =20 You may have the same problem I had. I was blowing a lot of oil out the crankcase breather too. My Performance Engines IO-550 had forged and = coated pistons that expand at a different rate than the ECI cast pistons with a steel band for the compression ring land. The compression rings had = worn so much in the lands on all 6 pistons they would =93flutter=94 when power = was reduced. The engine had about 40 hours TT. To test the pressure in the crankcase breather, tap a manometer into the breather about =BD it=92s = length or closer to the engine. My engine would show zero pressure on the ground regardless of power setting. On the takeoff roll still zero. At about = 120 knots it would jump to 5=94 and stay there until power was reduced. = When MP was slowly reduced to about 18=94 the pressure in the crankcase vent = line climbed to over 30=94. That was when all the oil was being blown out = the breather. The prop was unloaded just enough to allow the worn rings to flutter up and down in the ring lands and allow combustion pressure into = the crankcase. =20 =20 A mechanic and I spent weeks chasing this problem with ideas from many sources. The good folks at ECI (Engine Components Inc. of San Antonio, = mfg of the cylinders) had it figured out as soon as they heard the symptoms. ECI honed my cylinders and gave me new cast and steel banded pistons = with rings at no charge and within 48 hours. We got the cylinders back on = just in time to fly to Oshkosh. The belly is clean and my catch tank for the Andair Air-Oil Separator is bone dry. =20 =20 Steve Colwell Legacy N15SC ------=_NextPart_000_0010_01C8FA15.87099AF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Abe,

 

You may have the same problem I had.=A0 I was blowing a = lot of oil out the crankcase breather too.=A0 My Performance Engines IO-550 had = forged and coated pistons that expand at a different rate than the ECI cast pistons = with a steel band for the compression ring land.=A0 The compression rings had = worn so much in the lands on all 6 pistons they would “flutter” when = power was reduced. =A0The engine had about 40 hours TT.=A0 To test the = pressure in the crankcase breather, tap a manometer into the breather about =BD = it’s length or closer to the engine.=A0 My engine would show zero pressure on the = ground regardless of power setting.=A0 On the takeoff roll still zero.=A0 At about 120 = knots it would jump to 5” and stay there until power was reduced.=A0 When MP was = slowly reduced to about 18” the pressure in the crankcase vent line = climbed to over 30”.=A0 That was when all the oil was being blown out the = breather.=A0 The prop was unloaded just enough to allow the worn rings to flutter up and = down in the ring lands and allow combustion pressure into the crankcase.=A0=A0 =

 

A mechanic and I spent weeks chasing this problem with = ideas from many sources.=A0 The good folks at ECI (Engine Components Inc. of = San Antonio, mfg of the cylinders) had it figured out as soon as they heard = the symptoms.=A0 ECI honed my cylinders and gave me new cast and steel = banded pistons with rings at no charge and within 48 hours.=A0 We got the cylinders = back on just in time to fly to Oshkosh.=A0 The belly is clean and my catch tank for = the Andair Air-Oil Separator is bone dry.=A0

 

Steve Colwell=A0 Legacy =A0N15SC

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