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Don't mix the water before you fill your system with new antifreeze. I've never been able to completely drain any engine I've worked on. I drain, flush several times with water, drain, then add the correct amount of new antifreeze for the 50% mix* and top off with distilled water.

*60% antifreeze in severe winter climates.


Ken
 

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probably ok in PA to go half and half
50% mix freeze point is -34F, 60% mix freezez at -62F.
Boil point changes from 226 to 231F with concentration ^^
 

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Discussion Starter #6
thanks KLS and turtle !! That is the information I needed. Like turtle said, I think a half and half mix will be ok for me. We rarely get down to -34F, especially now that it is half way through Feb !

:thumbup:
 
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