What's your coolant temperature?

[Jiggs]

Thanks...wow fairly not that high mileage pala. I've seen much worse corrosion issue where the water channel is literally with thick lined brownish corrosion byproducts on them. Your's seem still in good shape yet the impellers were eaten out. It seems in our cooling system the impeller pala pinaka weaker metals/materials on them. Maybe due to it's spinning motion, Erosion and corrosion literally will eat the metal away.

[Vodka]

Thanks...wow fairly not that high mileage pala. I've seen much worse corrosion issue where the water channel is literally with thick lined brownish corrosion byproducts on them. Your's seem still in good shape yet the impellers were eaten out. It seems in our cooling system the impeller pala pinaka weaker metals/materials on them. Maybe due to it's spinning motion, Erosion and corrosion literally will eat the metal away.

cavitation pa. aside from corrosion protection the additives in the coolant also provides some cavitation protection.