Fresh motor, iron block and heads, stock radiator. Anti-freeze put in, cam broke in. Took car around the block and parked it. 6 months later (or maybe immediately) the stuff is the color of strong strong coffee. Never seen that before? This is not rust colored at all. As I said, looks like coffee, real strong coffee.
Any ideas? Seems to test for -35 ok.
Did you use staight anti freeze or a mix? I noticed with anti freeze and tap water it always turned dirty. Started using distilled water and it was much better looking.
