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Message: <blockquote data-quote="99Sierra2500" data-source="post: 28712" data-attributes="member: 12343"><p>Another classic is the big long series of posts, to find they are trying to use a seven year old battery. Dish soap ... hot coolant will steam clean oil, fine in the cooling system, terrible in the crankcase (bearing journals). I actually don't use any additives. Though if you have to flush your cooling system, I think prestone might still make a kit.</p></blockquote><p></p>