A old time radiator shop told me to flush the best you can with water then refill with water and one cup of Lestoil, run/use/drive the vehicle for a day or so then flush again. If need be repeat until it drains clear/clean. In my case it was the trans cooler built into the radiator that let go and pumped quite a bit of ATF into the cooling system. I've used that procedure several times with good results.
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1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03)
1998 S10 short bed
2002 S10 Blazer
1942 Oldsmobile
1958 Massey Harris Pony
1951 Wife
Killingworth, Connecticut
May those who love us, love us, any of those who do not love us, may God turn their hearts.
And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping.
A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.
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