If its a redish color, then there was some type of rust in the system. The DexCool itself when it gels up is more or an orangish brown color if not more of a light brownish color.

I also will add this to the mix. I have a test kit that will test the ph levels and additive concentration in coolants, including the so called long life coolants. I have yet to test one of them that was anywhere near being in good shape that long into the run.

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Scotty Hall
Bartlesville, OK
2001 Pontiac Grand Prix GTP
It whines a lot, but I like it.

The only limitation you will ever face in life is yourself!