Thank you for posting about DEX COOLANT...
I read it one day after I changed the antifreeze in both of my diesel engines and replaced perfectly good green antifreeze with orange dex....
25 flushes later (50 counting both engines) I was able to remove any hint of orange and replace the Dex with another Prestone product...one that is good with any color coolant....
I hate to think what would have happened if the DEX had sat in my engines for the 6 months that we leave our boat.
Thank you for the original post!!!!!!!!!!!!!!!!!!!!!!!!