Return-Path: Received: from marvkaye.olsusa.com ([207.30.195.24]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Thu, 16 Mar 2000 17:40:19 -0500 Message-Id: <3.0.3.32.20000316174538.00958530@olsusa.com> Date: Thu, 16 Mar 2000 17:45:38 -0500 To: lancair.list@olsusa.com From: "William T Bartlett" (by way of Marvin Kaye ) Subject: Re: Oil cooling Mime-Version: 1.0 X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> All (there might be an exception) Lycomings, with oil coolers, should have a thermostatic valve that starts routing the oil, to the oil cooler, when the oil temperature gets above about 180°. This valve works the opposite of an automotive thermostat, in that it is open when the oil is cold and the oil can go through the case galleries or the oil cooler. As the oil heats up the valve starts closing off the port to the galleries and forces it to go through the oil cooler and then into the galleries. On my engine it likes the route through the cooler best, so at low ambient temps, the oil temp will not get off the peg unless I block the cooling air to the oil cooler. I do this with a butterfly valve on the air intake. If I fly to warmer climates I just open the valve. I use the waste heat from the oil cooler for cabin heat, so I do have to let a small amount of air flow over the oil cooler when it's cold. Bill N7WB > >> > In the recent postings on oil cooling, a couple of people have > described their installations and the need to block some air flow to > the oil cooler during cold weather to keep the oil temps from being > too low. I thought the 320 and 360 had a thermal valve that metered > oil to the oil cooler. Doesn't this valve stop the oil flow to the > oil cooler when the oil temp is below a certain value preventing too > much cool air through the oil cooler from being a problem? >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>