X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 19 Jan 2006 00:08:53 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTP id 931339 for lml@lancaironline.net; Wed, 18 Jan 2006 09:34:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v38_r6.3.) id q.22f.4e4983e (3924) for ; Wed, 18 Jan 2006 09:33:15 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <22f.4e4983e.30ffabab@aol.com> X-Original-Date: Wed, 18 Jan 2006 09:33:15 EST Subject: Re: [LML] Re: major changes? - high oil consumption X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1137594795" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1137594795 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 1/18/2006 12:18:59 A.M. Central Standard Time, =20 marv@lancaironline.net writes: I had a top overhaul done a few years ago and, afterwards, oil consumption was so bad, the mechanic agreed to red= o it at no charge. That helped, but did not cure the problem. I still burn about one quart every two hours more or less. The oil is always black - indicating blow by (I'm told), I complained on and off for months to the mechanic who did the work, but I finally gave up and am just living with th= e problem - and using a different mechanic. Matt, John, et al, =20 High oil consumption is not a good thing. If I remember correctly, my Lyc=20 320 engine manual indicates that operations should not be conducted when oil= =20 consumption is in excess of 2 quarts per hour. =20 Here is the text from: =20 _http://www.lycoming.textron.com/main.jsp?bodyPage=3D/body.jsp_ (http://www.= lycoming.textron.com/main.jsp?bodyPage=3D/body.jsp)=20 =20 "Tips from the Hangar" =20 QUESTION =E2=80=94 What are the dangers of operating an engine with high oi= l=20 consumption?=20 ANSWER =E2=80=94 When excessive amounts of oil get past the rings, there is= danger=20 of the ring sticking or breaking with a dramatic rise in oil consumption. T= hen=20 oil soaked carbon forms at a fast rate. At the same time, the presence of=20 oil in the combustion chamber has the effect of lowering the octane rating=20= of=20 the fuel. Operating temperatures go up. We have now set up conditions invit= ing=20 detonation and/or preignition.=20 ----------------------=20 I am peeved with my stabilized rate of consumption of 1 quart every 5.5=20 hours or about .2 quart per hour. Such usage is not maximizing best power.= I=20 have tested for high crankcase pressure and found none. I am intrigued by=20 Chuck Moon's sump leak and I will check the induction system for the presen= ce of=20 oil. Another possibility is leakage thru loose valve guides.=20 I was further depressed by Bill Harrelson's Latin American trip report of=20 virtually no oil usage. Perhaps he just didn't remember adding oil because= of=20 excessive Margarita consumption?=20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) -------------------------------1137594795 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en

In a message dated 1/18/2006 12:18:59 A.M. Central Standard Time,=20 marv@lancaironline.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>I had a=20 top overhaul done a few years
ago and, afterwards, oil=20 consumption was so bad, the mechanic agreed to redo
it at no=20 charge. That helped, but did not cure the problem. I still=20 burn
about one quart every two hours more or less. The oil= is=20 always black -
indicating blow by (I'm told), I complained= on=20 and off for months to the
mechanic who did the work, but I final= ly=20 gave up and am just living with the
problem - and using a differ= ent=20 mechanic.

Matt, John, et al,

High oil consumption is not a good thing. If I remember correctly= , my=20 Lyc 320 engine manual indicates that operations should not be conducted when= oil=20 consumption is in excess of 2 quarts per hour.

Here is the text from: http:= //www.lycoming.textron.com/main.jsp?bodyPage=3D/body.jsp

"Tips from the Hangar"

QUESTION =E2=80=94 What are the dangers of operating an en= gine with high=20 oil consumption?

ANSWER =E2=80=94 When excessive amounts of oil get past th= e rings, there=20 is danger of the ring sticking or breaking with a dramatic rise in oil=20 consumption. Then oil soaked carbon forms at a fast rate. At the same time,=20= the=20 presence of oil in the combustion chamber has the effect of lowering the oct= ane=20 rating of the fuel. Operating temperatures go up. We have now set up conditi= ons=20 inviting detonation and/or preignition.

----------------------

I am peeved with my stabilized rate of consumption of 1 qu= art=20 every 5.5 hours or about .2 quart per hour. Such usage is not maximizi= ng=20 best power. I have tested for high crankcase pressure and found=20 none. I am intrigued by Chuck Moon's sump leak and I will check the=20 induction system for the presence of oil. Another possibility is leaka= ge=20 thru loose valve guides.

I was further depressed by Bill Harrelson's Latin American= trip=20 report of virtually no oil usage. Perhaps he just didn't remember addi= ng=20 oil because of excessive Margarita consumption?

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

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