The previous owner of mine installed a new water pump at 80k miles, and I did it again at 150k. Similarly don't have to change the coolant because the coolant e

The previous owner of mine installed a new water pump at 80k miles, and I did it again at 150k. Similarly don't have to change the coolant because the coolant expansion tank will break in 5 years time. (the corner is plastic and can't take the pressure.