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Quote:
Originally Posted by 30 Closed Cab PU
Not sure, possibility of rust if left dry, humidity in the air, similar to flash rust?
I prefer a 50/50 mix, or pure antifreeze. You can always drain it back into the containers in the spring and use it multiple storage seasons.
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Over time, antifreeze will also break down into an acid I believe. It will eat away at the metal inside the engine and water pump impeller. It doesn't sound like this is old antifreeze, so that is not likely the problem however. I would recommend doing something to treat the water jackets to a rust inhibitor or some sort of coating that would prevent the rust from forming. Is there an epoxy coating that could be introduced that is thin enough to flow but thick enough to adhere to the inside of the water jackets and channels in the head and block?