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Old shop foreman said to use plain water for coolant flush, thought he was crazy
He told me to skip the expensive flush chemicals and just run distilled water through a Detroit 60 series for 20 minutes. I tried it on a beat-up 2005 Freightliner last week and the crap that came out was wild - has anyone else had better luck with plain water than the fancy stuff?
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black.patricia1mo ago
Skip the expensive flush chemicals" is exactly right. Had an old timer tell me the same thing. Ran straight distilled water through a Cat 3406 for half an hour. Let it cool, drained it, did it again. Third time came out mostly clear. Then filled with coolant.
Saw the same on a Cummins ISX last year. Brown sludge just poured out. Fancy flush stuff can leave residue. Water just dissolves everything. Plus it saves you 40 bucks a bottle. Just don't use tap water or you get mineral deposits. Distilled only or you'll regret it.
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