Mayhem Pastel coolant separated. How do I fix this?

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MasonSTL

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Jul 29, 2014
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What are the best steps to remedy the problem with out any further damage? I just installed the new pump last week and am hoping that I didn't/don't destroy it. I noticed this happened overnight. I haven't had any troubles with this coolant in the past until this.

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rubix_1011
Hmmm, if it's meant to be good for that period of time, then I would agree with you that there was some sort of reaction. New pump...wondering if there was residual oil from manufacturing of the pump that might have caused this.

To clean, I would empty the loop completely and refill with a distilled water and (maybe) 10-25% vinegar mixture, or just water alone. Make sure this isn't left in the loop longer than 12-24 hrs, drain, then rinse everything well or run another loop of distilled water, only.
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rubix_1011

rubix_1011

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Jan 12, 2007
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My understanding is that some of Mayhem's product line is mainly intended to be used for short term usage and not necessarily a long-term coolant, but instead marketed mainly as trade show or demo use only as these coolants can break down and separate over longer periods of use.
 
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MasonSTL

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Jul 29, 2014
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The Pastel line of coolant has been described and tested to be used for 2 years. And I just changed out the coolant about a month ago but I reused the coolant when I put that new pump in about a week ago.

My only guess is that there was a chemical reaction with the metal of the new pump or radiator.

Really wondering what the best way to clean the rad, pump, and blocks would be. If there is something I can flush the loop with.

 
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rubix_1011

rubix_1011

Contributing Writer
Moderator
Jan 12, 2007
16,707
660
60,190
Hmmm, if it's meant to be good for that period of time, then I would agree with you that there was some sort of reaction. New pump...wondering if there was residual oil from manufacturing of the pump that might have caused this.

To clean, I would empty the loop completely and refill with a distilled water and (maybe) 10-25% vinegar mixture, or just water alone. Make sure this isn't left in the loop longer than 12-24 hrs, drain, then rinse everything well or run another loop of distilled water, only.
 
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