Antifreeze/coolant. Wow, this is right up my alley. I am the coolant engineer for John Deere. I can tell you books on coolant.
Basically about 99% of all long life coolants use 2-ethylhexanoat acid as one of the OATs or organic acid technologies. The reason for this is it is effective corrosion protection and its cheap.
The problem is cooling system seals and gaskets need to be designed to work with it or they shrink, become brittle and crack. This is why so many gasket problems came up in the early 90s when extended life coolant came on the market.
Long life coolants don"t need to use 2-ehn to be effective. John Deere is one of few that use other OATs so this isn"t an issue. So I can recommend Cool-Gard II engine coolant from you local John Deere dealer.
If your system is older than about 2000 and not designed to work with newer coolants like Dex- Cool, either use the traditional coolants or look for a long life coolant that doenst contain 2-ehn.
The good news is 2-ehn is a hazardous product. So it must be listed on an MSDS. Most don"t advertise the chemistry on the label, because it would mostly confuse people anyway. It also isn"t typically a selling point.
On the electrolysis issue, extra grounding on things can make the issue worse. That isn"t the answer. Believe me. Keeping a good coolant it is about the best solution.
If you want to know more, my email is open and I will help anyone with questions.
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