X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 28 May 2008 20:55:32 -0400 Message-ID: X-Original-Return-Path: Received: from n29.bullet.mail.mud.yahoo.com ([68.142.207.48] verified) by logan.com (CommuniGate Pro SMTP 5.2.3) with SMTP id 2942207 for lml@lancaironline.net; Wed, 28 May 2008 09:06:24 -0400 Received: from [68.142.200.226] by n29.bullet.mail.mud.yahoo.com with NNFMP; 28 May 2008 13:06:18 -0000 Received: from [68.142.201.64] by t7.bullet.mud.yahoo.com with NNFMP; 28 May 2008 13:06:23 -0000 Received: from [127.0.0.1] by omp416.mail.mud.yahoo.com with NNFMP; 28 May 2008 13:06:23 -0000 X-Yahoo-Newman-Id: 750781.73021.bm@omp416.mail.mud.yahoo.com Received: (qmail 83347 invoked from network); 28 May 2008 13:06:23 -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:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; b=rysEfmFH3PqvTp5Ba+g6vDrCvHR1mf5OU5XcMHvnTYe+T5vbTRcBFvT3bRmviX5bjBXYlDxwyPx04rHJYv57uNZoNtpqBF5KK+n1zUUe0zgVPMrtp9BSZ4+rXTjxQBvzojhGNlpFtdjFDV6AuIEN0Gix8GlHMfe2rFAoQJpbI7I= ; Received: from unknown (HELO Laptop) (mcmess1919@72.177.79.141 with login) by smtp121.plus.mail.mud.yahoo.com with SMTP; 28 May 2008 13:06:22 -0000 X-YMail-OSG: 9Y6oZkgVM1nEVYpy8bAQ4.6xfT_qpc9TSn9OkIVf65Lxg0Y0X0HCdx4FOA2O5vW5.5i1ZnHSfhGBbUCJb9IkJhS1qB6xQbyhxiO4bhe5KgH5nZ6v6YeT5KNZn2SKGgMNaxSejeT.uzISq0E4F_NKG14g X-Yahoo-Newman-Property: ymail-3 From: "Steve Colwell" X-Original-To: "'Lancair Mailing List'" , "Dennis Johnson" References: In-Reply-To: Subject: Oil on Belly X-Original-Date: Wed, 28 May 2008 08:06:22 -0500 X-Original-Message-ID: <000a01c8c0c3$a25e64b0$e71b2e10$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01C8C099.B9885CB0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Aci+6YxEczXjHywOQ7yo17RiaaNZQAAcPYLg Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_000B_01C8C099.B9885CB0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Dennis, I had a small leak where the steel crankcase vent tube exits the side of the dipstick housing. Found that with the balloon pressure/soap bubble test and fixed it with JB Weld. I have a premolded "S" shape automotive antifreeze hose that runs from the dipstick housing thru the rear baffling that tests OK under pressure and vacuum. I was running a Andair air/oil separator with the drain to a 3 oz reservoir to allow measuring of blowby between oil changes. It was masking the blowby that I think started at about 30 tach hours by filling the reservoir and then the bottom of the air/oil separator before large quantities came out the vent tube. I removed the separator early in testing to see if it had anything to do with the problem, it didn't. Steve 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 __________ NOD32 3128 (20080523) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com ------=_NextPart_000_000B_01C8C099.B9885CB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Dennis,

 

I had a small leak where the steel crankcase vent tube = exits the side of the dipstick housing.  Found that with the balloon = pressure/soap bubble test and fixed it with JB Weld.  I have a premolded = “S” shape automotive antifreeze hose that runs from the dipstick housing = thru the rear baffling that tests OK under pressure and vacuum.  I was = running a Andair air/oil separator with the drain to a 3 oz reservoir to allow = measuring of blowby between oil changes.  It was masking the blowby that I = think started at about 30 tach hours by filling the reservoir and then the = bottom of the air/oil separator before large quantities came out the vent = tube.  I removed the separator early in testing to see if it had anything to do = with the problem, it didn’t.

 

Steve

 

 

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 



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