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From: Hans Conser <conserreceipts@earthlink.net>
Subject: Re: [FlyRotary] Re: Un-touched engine (was: EC2 problems - solved / rotary risks)
Date: Mon, 6 Jun 2005 12:41:15 -0600
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


On Jun 6, 2005, at 12:17 PM, Ian Dewhirst wrote:

> Hi Bill,
>
> I am a proponent of "if it ain't broke, don't fix it." if you have some
> history with the mechanical device in question.  On the other hand, 
> when
> that history is unknown, not knowing can bite you.
>
> I bought a "Brand New" 13B - trouble was it had a bit of water in the
> coolant jacket, which corroded the iron castings.  Everything in oil 
> looked
> brand new.  The coolant passages were another story, after bead 
> blasting the
> coolant passages until they were clean I did a bit of destructive 
> testing on
> the castings with a dremel, just a bit because they looked fine...  a 
> minute
> later I was pretty dissapointed,  went through like butter in some 
> places
> ( like near the coolant o rings), just turned into black dust.  $1500 
> later
> I think I have an engine that is as good as it is going to get.
>
> Don't be put off working on a rotary, these engines are easy to work 
> on, buy
> a couple of good torque wrenches, a box of sandwich bags, a sharpie, 
> take
> pictures as you go and take your time - try it out on a junker 13B the 
> first
> time to build confidence.
>
> Even factory rebuilds have the occasional issue - I apprenticed at a 
> Porsche
> / Audi dealership.  I witnessed a $25,000 (1980 dollars) 3 litre 911 
> long
> block throw a rod in the first couple of minutes after start up, 
> missing
> connecting rod nut on one side of the cap - sh!t happens.
>
> FWIW
>
> Ian
>

I agree.  Of the four engines I have put in RX-7's, the one that leaks 
the most oil, is the factory reman I put in without taking apart.

Hans