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

1997 FORD EXPEDITION
220,201 MILES
Avatar
ROYCAR71
  • MEMBER
  • 359 POSTS
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?
Images (Click to enlarge)
Attached Media
Attached Media
Jun 21, 2012 at 9:44 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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
Jun 28, 2021 at 5:11 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.