Quote:
Originally Posted by gregpark
But AI said it could
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Antifreeze is primarily designed prevent the water in a cooling system freeze of course. But is is also vital to have anti corrosion and lubrication of the engine parts. The water pump needs the lubrication, and the internal brass and steel parts need the anti corrosion parts. Most sensors are brass, and many cars have plastic parts in there. I know Porsche has their special antifreeze to work with the plastic parts in the system.
When I pull the cap off my El Camino radiator, there is no corrosion as I replace the antifreeze every 24 months.
I can't image it will hurt plumbing. Even cast iron pipes made of the stuff of most engine blocks will not be hurt. Maybe the old orangeburg drain pipe might somehow be hurt, but I would bet there is a buildup of um "stuff" on the bottom of the pipe to keep any antifreeze from making contact.
I used to flush a large dose of rock salt down the toilet at my old bachelor pad house to slow down the roots from two large pecan trees in the back yard. I still had to have to rooted out every few years.
Now the water department might not like it, as it is toxic. I suspect it is diluted to the point is will not matter. That is just speculation. We don't ever flush it as our house is a kept warm.