Return-Path: Received: from fed1rmmtao04.cox.net ([68.230.241.35] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3151975 for flyrotary@lancaironline.net; Thu, 08 Apr 2004 00:37:45 -0400 Received: from Leonards ([68.111.228.182]) by fed1rmmtao04.cox.net (InterMail vM.6.01.03.01 201-2131-111-101-20040311) with ESMTP id <20040408043743.JLDR6900.fed1rmmtao04.cox.net@Leonards> for ; Thu, 8 Apr 2004 00:37:43 -0400 From: "David Leonard" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Cooling Problem Date: Wed, 7 Apr 2004 21:37:46 -0700 Message-ID: <000801c41d23$3d775c70$b6e46f44@Leonards> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01C41CE8.91188470" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01C41CE8.91188470 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Mark, I sealed that passage by welding a plate over it. So you are right that I probably have air trapped in there. It shouldn't be enough to prevent circulation, but a small hole would help to get that bit of air out of the system. I will do that. There won't be any significant flow through a #40 hole but it will allow the air to get out. One little improvement, now I just need a few more. David Leonard The Rotary Roster: http://members.aol.com/_ht_a/rotaryroster/index.html -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle Sent: Tuesday, April 06, 2004 1:00 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Cooling Problem Dave, One thing that caused me a bunch of head-scratching was the bypass circuit in the water pump housing when first filling the cooling system. It can prevent the wp impeller from pumping coolant through the engine. That is where I would look first. Did you weld and/or plug the hole at the bottom of the thermostat? If so, you could have air trapped in that cavity. If you installed a screw-in plug, try removing it and then filling the system, then replace the plug. If you're running a thermostat, have you removed it to fill the system? Mark S. ------=_NextPart_000_0009_01C41CE8.91188470 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mark,  I sealed that passage = by welding a plate over it.  So you are right that I probably have air trapped = in there.  It shouldn’t be enough to prevent circulation, but a small hole would = help to get that bit of air out of the system.  I will do that.  = There won’t be any significant flow through a #40 hole but it will allow the air to = get out.

 

One little improvement, now I just = need a few more.

 

David Leonard

The Rotary = Roster:

http://memb= ers.aol.com/_ht_a/rotaryroster/index.html

-----Original Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Tuesday, April 06, = 2004 1:00 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Cooling Problem

 

Dave,
One thing that caused me a bunch of head-scratching was the bypass = circuit in the water pump housing when first filling the cooling system.  It = can prevent the wp impeller from pumping coolant through the engine.  = That is where I would look first.  Did you weld and/or plug the hole at the = bottom of the thermostat?  If so, you could have air trapped in that cavity.  If you installed a screw-in plug, try removing it and then filling the system, then replace the plug.  If you're running a = thermostat, have you removed it to fill the system? 

Mark S.

 

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