Water pump bearings are sealed so the lubrication thing is a myth.
I have heard of water wetter leaving behind a white/beige/orange precipitate. I haven't had that happen and have done the water/water wetter on two vehicles. I have always switched when I have done a fresh build so perhaps it does react with certain coolant types.
I have heard of water wetter leaving behind a white/beige/orange precipitate. I haven't had that happen and have done the water/water wetter on two vehicles. I have always switched when I have done a fresh build so perhaps it does react with certain coolant types.