Coolant Testing Kits and How to Use Them
I test coolant regularly because I learned the hard way what happens when you do not. A batch of hydraulic cylinders came out with stained bores because the coolant pH had dropped too low. The coolant had gone acidic and was etching the steel surface. The customer rejected the whole batch — 45 parts scrap at $80 each. That loss was $3,600 from a $50 testing kit I had on the shelf but was not using. I test religiously now. Here is exactly what I use and how often. ...