Antifreeze

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   This may be a dumb question but can antifreeze settle out? I have an old nat gas powered pumping unit that has been sitting in the barn for the last 4 years. Before I parked it I changed the oil and antifreeze and then ran it for a few, maybe 10, minutes. I pulled it out a couple weeks ago and the antifreeze in the rad was slushy close to solid actually. I opened the drain on the block and it was fine. Put it in the heated shop and let it thaw out and took a closer look at it today. Antifreeze from the top of the radiator tested good to -8 celsius and the first stuff out of the block was good to -40. I mixed it all back up and it tested good to -29 which is about what it would have been when I put it in. How is that possible?

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Acguywill Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 15 Jan 2024 Location: Vauxhall ab Can Points: 184	Post Options Post Reply Quote Acguywill Report Post Thanks(0) Quote Reply Topic: Antifreeze Posted: 7 hours 57 minutes ago at 11:36pm
	This may be a dumb question but can antifreeze settle out? I have an old nat gas powered pumping unit that has been sitting in the barn for the last 4 years. Before I parked it I changed the oil and antifreeze and then ran it for a few, maybe 10, minutes. I pulled it out a couple weeks ago and the antifreeze in the rad was slushy close to solid actually. I opened the drain on the block and it was fine. Put it in the heated shop and let it thaw out and took a closer look at it today. Antifreeze from the top of the radiator tested good to -8 celsius and the first stuff out of the block was good to -40. I mixed it all back up and it tested good to -29 which is about what it would have been when I put it in. How is that possible?

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IBWD MIke Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 08 Apr 2012 Location: Newton Ia. Points: 4235	Post Options Post Reply Quote IBWD MIke Report Post Thanks(0) Quote Reply Posted: 1 hour 13 minutes ago at 6:20am
	Never heard of that, never given it much thought. I suppose it's possible? It may not have mixed completely in the short run-time?

Jim.ME Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 19 Nov 2016 Location: Maine Points: 970	Post Options Post Reply Quote Jim.ME Report Post Thanks(0) Quote Reply Posted: 1 hour 5 minutes ago at 6:28am
	That initial 10-minute run time was not enough to thoroughly mix it. You should have run it up to temperature so the thermostat opened and kept it there for at least 10-minutes to circulate and mix the entire system.