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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Frozen coolant...
Date: Mon, 9 Jan 2006 07:56:02 -0500
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Dave, Barry, is right. I was thinking that at this antifreeze  
concentration you'll get slush at the most. But I maybe in the same  
boat: Noticed some coolant drops at the corner of the radiator. The  
welder blew a tube while welding it. it was epoxyed and tested by a  
rad shop. Will see how it goes. Good luck with yours.
Bulent "Buly" Aliev
http://tinyurl.com/dcy36


On Jan 9, 2006, at 7:00 AM, Barry Gardner wrote:

> Dave,
>
> You might be too pessimistic. Glycol/water in a 25/75 mix is  
> supposed to protect down to 15 degrees, according to tables I  
> looked up. Low 20's shouldn't have been a problem. Even near the  
> transition point, the mix turns slushy before freezing solid.
>
> Nonetheless, you've obviously got a leak somewhere. Just don't  
> assume the worst until you've confirmed it's true. Is your recent  
> leak fix still holding? First place I'd look.
>
> Pressurizing the system is a good idea. Auto parts stores like  
> Autozone will lend you the coolant system pressure tester that fits  
> in standard  radiator cap openings. Pressurize and see where it  
> leaks. You can also dump in a UV dye indicator (I've bought it at  
> NAPA), run the engine briefly and then look for the leak using a  
> black light. I've used both the pressure tester and UV dye.
>
> Sorry about your troubles.
>
> Barry Gardner
> Wheaton, IL