Gold Founding Member
Join Date: Aug 1998
Location: the Seasonally Frozen Wastelands
Re: Water Jacket Cleaning
Thousands of years ago, a buddy of mine had a crusted-up 383 Mopar. He discovered acid-in-a-bottle sold for cleaning automobile cooling systems. Hydrochloric? Sulfuric? I don't remember. Flush the coolant, dump the acid into a cold cooling system, run the engine til it gets warm, drain the coolant. Flush again, refill, check for leaks.
The bottle suggested changing hoses and water pump after using it.
I don't imagine OSHA or the EPA approved of this.
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