Finn;  I worked with a mechanic before I retired, who used toilet bowl
cleaner on castings, it really works, don't know what effect it would have
on aluminum.  JohnD
----- Original Message -----
From: "Finn Lassen" <finnlassen@netzero.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, January 29, 2004 3:03 PM
Subject: [FlyRotary] Cruddy water passages


> I've started to clean the 13B that I got out of junk yard car some 7
> years ago.
>
> I'm amazed at the amount of crud (scale, rust, etc.) there are in the
> water passages.
>
> When I overhauled my first junkyard engine, I didn't pay much attention
> to the water passages in the end and center housings. They are not all
> that easy to get to as they pass beneath the side surfaces.
>
> For quite a while now I've been puzzled why my left radiator only flows
> 1/10th of the right radiator, and thus runs very cold. But when I first
> ran the engine it was just a hot as the right rad. So, I think it's
> possible that some scale or flakes broke loose from the water passages
> and jammed in the small pasasages in the radiator.
>
> Of course I'm going to try to clean the current engine as best I can
> (any suggestions on how to get to those passages are welcome), and I
> might just run the engine for some time without the rads - simply
> connecting a hose from a water post to the pump inlet and thus flush it
> while it runs.
>
> But I'd like any suggestions of suitable filters to put in line with the
> hoses from the engine to the rads. Does not have to be very fine - just
> enougth to stop particles that could get caught in my new rads.
>
> Finn
>
>
>
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