X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1315186 for flyrotary@lancaironline.net; Tue, 25 Jul 2006 11:05:12 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.27; envelope-from=ALVentures@cox.net Received: from BigAl ([72.192.132.90]) by fed1rmmtao12.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060725150423.WHSZ985.fed1rmmtao12.cox.net@BigAl> for ; Tue, 25 Jul 2006 11:04:23 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: Coolant Date: Tue, 25 Jul 2006 08:04:26 -0700 Message-ID: <000001c6affb$9f5b9830$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C6AFC0.F2FF3130" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C6AFC0.F2FF3130 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I came across this statement on a web site discussing cooling issues = with RX-7s: =20 Use a 30/70 mixture of ethylene glycol and water. Never use "red" = coolant (Dex-Cool) as it is very corrosive to the seals inside the rotary = engine. =20 I am using about a 30/70 mix of Prestone "Dex-Cool Approved" and water. From what I read, Dex-Cool was formulated by GM engineers specifically = to give improved cooling and better corrosion protection for aluminum radiators. I have two custom aluminum radiators in my airplane, along = with some aluminum housings in the engine. Seemed to me the Dex-Cool = formulation was clearly the way to go. =20 Is the above statement just some bogus statement based on myth, or does somebody on this list have some data/experience to support it. =20 I've also been using this stuff in my old van and XJS for years with no issues. =20 Al =20 ------=_NextPart_000_0001_01C6AFC0.F2FF3130 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I came across = this statement on a web site discussing cooling issues with RX-7s:

Use a 30/70 mixture of ethylene glycol and water. Never use "red" coolant (Dex-Cool) as it is very corrosive to the seals = inside the rotary engine.

I am using about a 30/70 mix of = Prestone “Dex-Cool Approved” and water. From what I read, = Dex-Cool was formulated by GM engineers specifically to give improved cooling and = better corrosion protection for aluminum radiators. I have two custom = aluminum radiators in my airplane, along with some aluminum housings in the engine. Seemed to me the Dex-Cool formulation was clearly the way = to go.

Is the above statement just some = bogus statement based on myth, or does somebody on this list have some data/experience to support it.

I’ve also been using this = stuff in my old van and XJS for years with no issues.

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