testing coolant strength

[DavidT]

I double checked my coolant strength... I flushed it over the summer (50/50). Car had sat for a day when I checked it. I got one ball to float = 20 degrees F. I checked it again today after driving it for several miles. 3 balls floated this time. Is there an explanation as to why it read inconsistently?

 

[laxmax327]

not sure. dunno how accurate those testers are and i suppose the water and antifreeze could have possibly seperated slightly while sitting. although i dont think it would happen that quickly, but it may have.

 

[SHOZ123]

They are temperature defendant. Be sure to always use the tester at approximately the same coolant temp.

 

[F-22 Raptor SHO]

the antifreeze doesnt separate from the water. They are soluble. The balls measure measure concentration based on density...the density of the mixture changes with temperature.