X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 26 May 2008 00:32:22 -0400 Message-ID: X-Original-Return-Path: Received: from smtp0.av-mx.com ([137.118.16.56] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with ESMTP id 2938031 for lml@lancaironline.net; Sun, 25 May 2008 12:58:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.56; envelope-from=pinetownd@volcano.net Received: from DennisDell (65-166-101-126.dsl.volcano.net [65.166.101.126]) (Authenticated sender: pinetownd@volcano.net) by smtp0.av-mx.com (Postfix) with ESMTP id 6C9E91BF7CD for ; Sun, 25 May 2008 12:57:39 -0400 (EDT) X-Original-Message-ID: <005201c8be88$6b360070$6601a8c0@DennisDell> From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" Subject: Oil on Belly X-Original-Date: Sun, 25 May 2008 09:57:28 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004F_01C8BE4D.BDED8BC0" 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_004F_01C8BE4D.BDED8BC0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hi Steve, Did you install the Andair air/oil separator you bought? Does it fill = with oil immediately? Your engine was rebuilt at the same place as mine. The crankcase vent = fitting just below the oil filler cap on mine nearly dead-ends into one = of the intake air runners. When I tried to run the conventional black = rubber vent hose from that fitting, it kinked from the tight bend. I'm = sure you would have noticed it kinked if that were the case on yours, = but I thought I'd mention it just in case. (By the way, I solved the = problem by using silicone hose from Spruce, part number 05-00671. The = silicone hose bends tighter without kinking than the rubber hose.) Anyone have a theory why the manometer pressure in the crankcase vent = line spikes up (I assume it's reading pressure, not vacuum) when you = reduce power in the traffic pattern? I would expect the pressure to = drop, not increase. But there's a lot I don't know about engines. Is = it because the piston rings momentarily lose their seal against the = cylinder walls with the drop of pressure on top of the pistons, allowing = blowby? Good luck, Dennis ------=_NextPart_000_004F_01C8BE4D.BDED8BC0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Hi Steve,

Did you install the Andair air/oil separator you bought? Does = it fill=20 with oil immediately?

Your engine was rebuilt at the same place as mine. The = crankcase vent=20 fitting just below the oil filler cap on mine nearly dead-ends into one = of the=20 intake air runners. When I tried to run the conventional black = rubber vent=20 hose from that fitting, it kinked from the tight bend. I'm sure = you would=20 have noticed it kinked if that were the case on yours, but I thought I'd = mention=20 it just in case. (By the way, I solved the problem by=20 using silicone hose from Spruce, part number 05-00671. The = silicone=20 hose bends tighter without kinking than the rubber hose.)

Anyone have a theory why the manometer pressure in the crankcase = vent line=20 spikes up (I assume it's reading pressure, not vacuum) when you reduce = power in=20 the traffic pattern? I would expect the pressure to drop, not=20 increase. But there's a lot I don't know about engines. Is = it=20 because the piston rings momentarily lose their seal against the=20 cylinder walls with the drop of pressure on top of = the=20 pistons, allowing blowby?

Good luck,

Dennis

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