Traditional green antifreeze/coolant 50/50 pre diluted shelf life?

Tiny
XCHCUI
  • MEMBER
  • 1990 OPEL CORSA
  • 220,000 MILES
Hi

what is the shelf life of AcDelco traditional green coolant 50/50 pre-diluted(not the concentrate one) when the seal is not opened, and store in optimal conditions?
what is the shelf life of AcDelco traditional green coolant 50/50 pre-diluted(not the concentrate one) when the seal is not opened, and store in optimal conditions?
thanks.
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Thursday, October 31st, 2013 AT 7:14 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
There is no shelf life on unused coolant. It doesn't start to deteriorate until it's put into a car.

There aren't many cars that you can use that stuff on these days though.
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Thursday, October 31st, 2013 AT 8:05 AM
Tiny
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There are some articles on the net which said that the silicates in the green pre diluted coolant are not stable because the mix with water and with time they begin separate from the coolant and the coolant become jelly and with particle residue, even if it unused.
Is it true?What is it with these silicates?
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Saturday, November 2nd, 2013 AT 1:18 PM
Tiny
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I don't know. I've never had an issue with coolant sitting on the shelf. Like I said, everything you should be using these days is silicate free. That green stuff is pretty much obsolete.
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Saturday, November 2nd, 2013 AT 1:24 PM

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