X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 24 May 2006 00:18:02 -0400 Message-ID: X-Original-Return-Path: Received: from [207.254.33.66] (HELO DEWEY2.Cadwell.cadwell.com) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTP id 1125134 for lml@lancaironline.net; Tue, 23 May 2006 15:26:43 -0400 Received-SPF: none receiver=logan.com; client-ip=207.254.33.66; envelope-from=CarlC@Cadwell.com Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C67E9E.B7D2D9A5" X-MimeOLE: Produced By Microsoft Exchange V6.5 Subject: Valves again X-Original-Date: Tue, 23 May 2006 12:25:58 -0700 X-Original-Message-ID: <63D0A1D8F168684F8502C4B8A229D791F1D6DC@DEWEY2.Cadwell.cadwell.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Valves again Thread-Index: AcZ+nrfNG0TgWrG0QpuhSy1L+I+BpQ== From: "Carl Cadwell" X-Original-To: This is a multi-part message in MIME format. ------_=_NextPart_001_01C67E9E.B7D2D9A5 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I have 5 exhaust valves that are leaking on this annual. Compressions are all at acceptable levels (62-76). 8 exhaust valves have been previously done.=20 Running LOP 70 degrees or less of peak EGT at 31", 2500 rpm with GAMI injectors, head temperatures are at 300 in cruise. TCM TSIO 550E1B, 925 hours. I have the Micro Vision monitoring with no data logging. I climb with high fuel flows (35gph) and low temperatures (max 360 heads)=20 I have gone to the GAMI course (Advanced Pilot Training) and believe I am doing everything correctly. What am I doing wrong? Running LOP? Running to hard LOP? Have had poor rebuilders do the pervious work? So what do I do? =20 Is this engine rebuild time? The cylinders look fine with a boroscope examination. I will know more after the heads and cylinders are pulled. Have all the exhaust valves, seats and guides done again? If so, who are the credible shops to do this? Start over with an engine rebuild? Nothing else looks wrong with the engine. Put in new cylinders, heads, pistons and rings? Oil consumption is 1 qt every 20 hours. Exxon oil. Insanity is to continue to do the same thing and expecting the outcome to be different. Insights, suggestions, strong opinions are all welcome. =20 Thanks, Carl Cadwell N25CL Lancair IVP ------_=_NextPart_001_01C67E9E.B7D2D9A5 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Valves again

I = have 5 exhaust valves that are leaking on this annual.  Compressions are all = at acceptable levels (62-76).  8 exhaust valves have been previously done. =

Running LOP 70 degrees or less of peak EGT at 31”, 2500 rpm with GAMI injectors, head temperatures are at 300 in = cruise. TCM TSIO 550E1B, 925 = hours.  I have the Micro = Vision monitoring with no = data = logging.   I climb with = high fuel flows (35gph) and low temperatures (max 360 heads)

I = have gone to the GAMI course (Advanced Pilot Training) and believe I am = doing everything correctly.

What = am I doing wrong?

Running LOP?  Running to hard LOP?  = Have = had poor rebuilders do the pervious work?

So what do I do?  =

Is = this engine rebuild time?  The cylinders look = fine with a boroscope examination.  I will know more after the heads and cylinders are = pulled.

Have = all the exhaust valves, seats and = guides = done again?  If so, who are the credible shops to do = this?

Start = over with an engine rebuild?  Nothing else looks wrong with the = engine.

Put = in new cylinders, heads, pistons and rings?

Oil = consumption is 1 qt every 20 hours.  Exxon oil.

Insanity is to continue to do the same thing and = expecting = the outcome to be different.

Insights, suggestions, strong opinions are all = welcome. 

Thanks,

Carl = Cadwell

N25CL  Lancair IVP

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