Mailing List flyrotary@lancaironline.net Message #29118
From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Frozen coolant...
Date: Mon, 9 Jan 2006 23:07:59 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
It took only 11 hours for MaBell to deliver my the message to the list :)
Buly

On Jan 9, 2006, at 7:56 AM, Bulent Aliev wrote:

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

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