Message-ID: <401A01F8.5050504@netzero.net>
Date: Fri, 30 Jan 2004 02:04:24 -0500
From: Finn Lassen <finnlassen@netzero.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Cruddy water passages
References: <list-2956635@logan.com>
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A guy at work suggested I locate a rad or engine overhaul shop and have 
them put the housings in their acid vat.
Obviously a vat with ultrasound agitation would be best.
A concern is whether the acid will attack the critical surfaces.

I also considered sand blasting, but again a concern is damaging the 
critical surfaces, not to mention getting any grains of sand left in oil 
passages.

I sure like echristley's idea of bottles in the hoses between engine and 
rads. Temporary, for the first 100 hours or whatever.

You might save yourself some time in cleaning the engine by hooking up a 
pump and heater and circulating coolant system cleaner through the 
engine _before_ you take it apart.

Finn

Jim Sower wrote:

><... I'm amazed at the amount of crud (scale, rust, etc.) there are in the
>water passages. ...>
><... I think it's possible that some scale or flakes broke loose from the
>water passages and jammed in the small passages in the radiator ...>
>I too have a relatively old core.  I haven't opened it up yet, but I think I
>should prepare for the worst.  How do you remove the scale, etc.?  Is there
>a "chemical solution" or do you just scrape and brush it out?  Sure ain't
>looking forward to no "hand job". :-(
>
>Wishing for an easy way .... Jim S.
>--
>Jim Sower ... Destiny's Plaything
>Crossville, TN; Chapter 5
>Long-EZ N83RT, Velocity N4095T
>
>  
>