Also make sure that the overflow tank is full to the cold line with a 50/50 mix,
I don't think you should have a 50/50 mix in the over flow, but the same product, Engine Ice, in there instead. You don't want to mix up the 2 different products.
Your're correct gordonv,, you do not want to mix the two, I misspoke when I said 50/50,, hope I didn't cause any confusion robin.