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Old 08-19-2016, 11:24 AM   #1
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My coolant is Green

I was checking my coolant this week and noticed it is green, to me that means at some point before I owned the car someone put Preston in it....I suppose I will just do the same once I preemptively change out the water pump.

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Old 08-19-2016, 11:32 AM   #2
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Mine was also Green. From what I've heard, way back when America was Great, the Porsche coolant was green, same formula as the Pink stuff
So for me either my coolant was 14 years old or someone switched like you are thinking.

I wanted to go Pink so not knowing, I Flushed twice with distilled and then went Pink

Without knowing, all you can do to top off is add distilled water.
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Old 08-19-2016, 12:14 PM   #3
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Quote:
Originally Posted by kk2002s View Post
Without knowing, all you can do to top off is add distilled water.
+1, you never want to mix coolants.

If you don't know what is in there the best thing to do is flush the system with distilled water and replace all of the coolant. It's not worth the risk of accidentally mixing coolants and having it gel.
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Old 08-19-2016, 01:08 PM   #4
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Originally Posted by Pdwight View Post
I was checking my coolant this week and noticed it is green, to me that means at some point before I owned the car someone put Preston in it....I suppose I will just do the same once I preemptively change out the water pump.
Up until about 2003, everyone's Porsche coolant was green, and then they modified the formulation and it became a pink color. Fortunately, the pink stuff is completely compatible with the original Porsche green coolant.
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Old 06-01-2018, 10:16 AM   #5
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Up until about 2003, everyone's Porsche coolant was green, and then they modified the formulation and it became a pink color. Fortunately, the pink stuff is completely compatible with the original Porsche green coolant.
If, indeed, the green stuff is original coolant and never changed or topped up with the likes of old fashioned Prestone. No way for we mere mortals to know, so cleaning it out and starting from scratch is probably the best approach.

I live in the desert, where it gets hot. All my cars have a fresh gallon of distilled in the trunk. Cheap insurance--88 cents a gallon at Walmart. In an emergency, you can drink it or give some to your dog.
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Old 06-01-2018, 10:27 AM   #6
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Up to about a year and half ago (Coolant was green), I always carried a gallon of distilled water for emergency. That's when I flushed and filled with pink. Then I started carried a gallon 50/50 pink/Distilled water.
But you bring up a great thought. Distilled water has greater uses. I think I'll go back to the gallon of distilled water
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Old 06-01-2018, 11:44 AM   #7
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I used to do that, too. Then thermal expansion from the heat in the trunk popped the top off the gallon jug and it sloshed around my trunk for quite a while before I noticed it.

I guess I should have squeezed the jug a bit to allow for expansion...

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