Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 22 May 2003 22:00:57 -0400 Message-ID: X-Original-Return-Path: Received: from rly-ip05.mx.aol.com ([64.12.138.9] verified) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2359837 for flyrotary@lancaironline.net; Thu, 22 May 2003 21:11:19 -0400 Received: from logs-wk.proxy.aol.com (logs-wk.proxy.aol.com [205.188.198.135]) by rly-ip05.mx.aol.com (v90_r2.6) with ESMTP id RELAYIN10-0522210958; Thu, 22 May 2003 21:09:58 -0400 Received: from office (AC818280.ipt.aol.com [172.129.130.128]) by logs-wk.proxy.aol.com (8.12.9/8.12.9) with ESMTP id h4N16NGQ256573 for ; Thu, 22 May 2003 21:06:55 -0400 (EDT) From: "Marc Wiese" X-Original-To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: coolant / thermostat X-Original-Date: Thu, 22 May 2003 20:06:26 -0500 X-Original-Message-ID: <000201c320c7$8baeb810$808281ac@office> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 In-Reply-To: X-Apparently-From: Gary34807@aol.com > Al, > Are you using the stock 20B pump, or a 13B pump? > > Mark S. > > I don't know. David Atkins bills it as "Lightweight aluminum water pump > housing and a new heavy duty water pump." It could well be the stock > 20B pump. > > Al I think my 20B stock pump is black steel, just like the 2nd gen engines but bigger and turns opposite, I think. The 3rd gen has an all alum water pump of different design than the 2nd gen. As the 20Bs were pre 3rd gen (about to 1990 or so?) they followed Mazda's current practices at the time, I believe it was a progression thing. And the 20B used a pulley mounted fan on the pump, whereas the 3rd gen uses 2 electric fans and no pump fan. [Marc Wiese]