X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao01.cox.net ([68.230.241.38] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1315386 for flyrotary@lancaironline.net; Tue, 25 Jul 2006 12:45:52 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.38; envelope-from=ALVentures@cox.net Received: from BigAl ([72.192.132.90]) by fed1rmmtao01.cox.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20060725164503.OSYH6077.fed1rmmtao01.cox.net@BigAl> for ; Tue, 25 Jul 2006 12:45:03 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Coolant Date: Tue, 25 Jul 2006 09:45:07 -0700 Message-ID: <001e01c6b009$aff8cbf0$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001F_01C6AFCF.0399F3F0" 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_001F_01C6AFCF.0399F3F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Thanks, Fred. I am reassured. =20 Al =20 -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of CCI Sent: Tuesday, July 25, 2006 7:28 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Coolant =20 Hi Al, The actual Dex-Cool (which is no longer available) will do in any rubber seals in the engine, for sure. I have a Chevrolet with a 3.1 V-6 = and at 60,000 had to replace the rubber intake manifold seals. When I got it apart there was not much left of them. I use the Prestone "Dex-Cool Approved" antifreeze now and have had no problems. ( in my old van, too) There is a class action lawsuit going on right now, I understand against = the manufacturer of Dex-Cool. There is a service bullitin from GM to replace = the Dex-Cool with an approved anti-freeze, so it is no myth. As long as you aren't running actual Dex-Cool, you'll be fine. Fred At 08:04 AM 7/25/2006 -0700, you wrote: 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_001F_01C6AFCF.0399F3F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Thanks, Fred.  I am = reassured.

 

Al

 

-----Original = Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of CCI
Sent: Tuesday, July 25, = 2006 7:28 AM
To: Rotary motors in = aircraft
Subject: [FlyRotary] Re: = Coolant

 

Hi Al, The actual Dex-Cool (which is no = longer available) will do in any rubber seals in the engine, for sure. I have a Chevrolet with a 3.1 V-6 and at 60,000 had to replace the rubber intake manifold seals. When I got it apart there was not much left of them. I = use the Prestone "Dex-Cool Approved" antifreeze now and have had no = problems. ( in my old van, too) There is a class action lawsuit going on right = now, I understand against the manufacturer of Dex-Cool. There is a service = bullitin from GM to replace the Dex-Cool with an approved anti-freeze, so it is = no myth. As long as you aren't running actual Dex-Cool, you'll be fine. Fred





At 08:04 AM 7/25/2006 -0700, you wrote:

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.
 
Al
 


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