X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 02 Mar 2008 21:46:05 -0500 Message-ID: X-Original-Return-Path: Received: from smtp0.av-mx.com ([137.118.16.56] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2773675 for lml@lancaironline.net; Sun, 02 Mar 2008 12:09:44 -0500 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.56; envelope-from=pinetownd@volcano.net Received: from DennisDell (65-174-1-36.dsl.volcano.net [65.174.1.36]) (Authenticated sender: pinetownd@volcano.net) by smtp0.av-mx.com (Postfix) with ESMTP id D56021BF3E3 for ; Sun, 2 Mar 2008 12:09:04 -0500 (EST) X-Original-Message-ID: <004401c87c88$1b53c390$6601a8c0@DennisDell> From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" Subject: Oil Cooler IO-550 Legacy X-Original-Date: Sun, 2 Mar 2008 09:08:57 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0041_01C87C45.0C3B0000" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 This is a multi-part message in MIME format. ------=_NextPart_000_0041_01C87C45.0C3B0000 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable I recently posted a photo of the cracked oil cooler box on my IO-550 = Legacy. The reason I had the box out was that I was adding the oil = cooler door. Like Douglas, I did not install the oil cooler door when I = built my Legacy. First flight was a year ago and my oil temperatures = were fine during the summer, but with winter weather, the oil was too = cool. On a recent flight the oil was down to 130=B0F. Since I was = doing my first annual inspection, I figured it was the right time to = install the oil cooler door. That involved removing the oil cooler box, which I needed to do anyway = because of the crack, adding a piano hinge and the door, and installing = the control cable in the cockpit. I work pretty slowly and spent the = better part of two days doing this. =20 By the way, the TCM shop manual for the IO-550 specifies 170=B0F as the = minimum oil temperature for cruise. I don't know, but I think that is = based on heating the oil enough to drive off water, which enters the oil = as a product of the combustion process, and not on anything related to = the lubricating property of the oil. (TCM specifies that you can run = 100% power with oil temperature of only 100=B0F on takeoff, so 100=B0F = oil must provide adequate lubrication.) Dennis Johnson Legacy, just completed first annual inspection ------=_NextPart_000_0041_01C87C45.0C3B0000 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

I recently posted a photo of the cracked oil cooler box on my = IO-550=20 Legacy. The reason I had the box out was that I was adding = the oil=20 cooler door. Like Douglas, I did not install the oil cooler door = when I=20 built my Legacy. First flight was a year ago and my oil = temperatures were=20 fine during the summer, but with winter weather, the oil was too=20 cool. On a recent flight the oil was down to 130=B0F. = Since I was=20 doing my first annual inspection, I figured it was the right time to = install the=20 oil cooler door.

That involved removing the oil cooler box, which I needed to do = anyway=20 because of the crack, adding a piano hinge and the door, and installing = the=20 control cable in the cockpit. I work pretty slowly and spent the = better=20 part of two days doing this.

By the way, the TCM shop manual for the IO-550 specifies 170=B0F as = the=20 minimum oil temperature for cruise. I don't know, but I = think=20 that is based on heating the oil enough to drive off water, which enters = the=20 oil as a product of the combustion process, and not on anything = related to=20 the lubricating property of the oil. (TCM specifies that you can = run 100%=20 power with oil temperature of only 100=B0F on takeoff, so 100=B0F = oil must=20 provide adequate lubrication.)

Dennis Johnson

Legacy, just completed first annual inspection

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