Do I add coolant or water to increase/decrease freeze and boiling points?

Tiny
ROYCAR71
  • MEMBER
  • 1997 FORD EXPEDITION
  • 220,201 MILES
I just did coolant flush. My freeze and boiling points are not accurate. Do I add coolant or water to increase/decrease freeze and boiling points?
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Thursday, June 21st, 2012 AT 9:44 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
Hi,

This is a hard question to answer simply because I'm not sure what the ratio was that you installed already. The strongest mixture for engine coolant/anti-freeze is a 50/50 mixture.

Here is a link you may find of interest. It explains the general topics related to engine coolant.

https://www.2carpros.com/articles/engine-coolant-59420607

I hope this answers your question. If you added something other than a 50/50 mixture, compensate by adding what it takes to reach the 50/50 dilution.

Take care,

Joe
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Monday, June 28th, 2021 AT 5:11 PM

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