Return-Path: Received: from mail.viclink.com ([66.129.220.6] verified) by logan.com (CommuniGate Pro SMTP 4.1) with ESMTP id 2511929 for flyrotary@lancaironline.net; Tue, 05 Aug 2003 09:33:57 -0400 Received: from viclink.com (p177.AS1.viclink.com [66.129.192.177]) by mail.viclink.com (8.11.7/8.11.7) with ESMTP id h75DXsf18173 for ; Tue, 5 Aug 2003 06:33:54 -0700 (PDT) Message-ID: <3F2FB1F2.1040600@viclink.com> Date: Tue, 05 Aug 2003 06:32:34 -0700 From: Perry Mick User-Agent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Oshkosh Grumps References: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-RAVMilter-Version: 8.4.3(snapshot 20030217) (mail.viclink.com) Hi Howard, good to hear from you. It was Tracy who noticed the drops of coolant. Both of my failures two years ago were bearing failures. Stone Tool wrote: >Perry: > The water pump bearings are a surface to surface seal with a spring loaded neoprene piece that turns against a ceramic wear surface. Leakage in these seals is not uncommon, and does not necessarily indicate any real problem. A bit of build up of engine sludge or a bit of grit will make them seep slightly. This does not indicate a problem with the bearing, and often does not even indicate a real problem with the seal. I have seen the telltale drop of coolant on virtually new pumps. It is not a warning of impending failure..... if your pump is not old, don't worry too much about it. > > H.W. > > >*********** REPLY SEPARATOR *********** > >On 8/4/03 at 9:07 PM Perry Mick wrote: > > > >>Tracy Crook wrote: >> >> >> >>>Saw the first sign of waterpump failure on the engine. Noticed a drop of >>>coolant hanging from the pump pulley every morning when I took the >>> >>> >>cowl off >> >> >>>to begin another day of talking airplanes & engines. No noticable play >>> >>> >>in >> >> >>>the pump bearings and I noticed no drop in coolant pressure on the way >>> >>> >>home >> >> >>>but a new pump is definitely in order. This was the original pump I got >>>with the 1988 13B engine I bought back in 1992. >>> >>> >>>Tracy Crook >>> >>> >>> >>> >>The water pumps went out in my '86 plane and my '86 car two years ago, >>so it is about right that your '88 water pump should be failing now. >>They last exactly 15 years :) >> >>-- >>Perry Mick >>http://www.ductedfan.com >> >> >> >> >>