Return-Path: Sender: (Marvin Kaye) To: lml Date: Wed, 28 Aug 2002 09:06:18 -0400 Message-ID: X-Original-Return-Path: Received: from granger.mail.mindspring.net ([207.69.200.148] verified) by logan.com (CommuniGate Pro SMTP 4.0b7) with ESMTP id 1713162 for lml@lancaironline.net; Tue, 27 Aug 2002 23:11:45 -0400 Received: from pool0117.col.dialup.earthlink.net ([64.91.208.117] helo=djpryanria) by granger.mail.mindspring.net with smtp (Exim 3.33 #1) id 17jtF9-0006Xh-00 for lml@lancaironline.net; Tue, 27 Aug 2002 23:11:44 -0400 X-Original-Message-ID: <000c01c24e40$98b271a0$75d05b40@net.ruralnet.net> From: "DON RYAN" X-Original-To: "LANCAIR LIST" Subject: WATER IN CRANKCASE X-Original-Date: Tue, 27 Aug 2002 22:08:39 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 I don't understand the discussions on water in the crankcase. A few questions are: 1. How hot is the exhaust gas venting from the crankcase? As hot as the cylinder head? 2. What is the dew point of the exhaust gas? 3. Don't all engines have a crankcase vent? Why open the dipstick? To create a circulation? I would have thought that the only time we have a problem with water in the crankcase is with the cold engine and at shutdown. The gas in the crankcase at shutdown could cool to the dewpoint and deposit water, unless it is displaced with drier air. I would think that the water condensed on a cold start would quickly be evaporated when the engine is up to temperature. Notice, I think I am talking about evaporation not boiling. I think I will try and measure the temp at the vent and maybe calculate or measure the dew point. I would also guess that the hot CO2 and CO in the exhaust are corrosive even in the presence of only water vapor??