The water pump in my 1979 Celica has a pulley that is wobbling. It’s original, 240k miles- doesn’t owe me anything. Replacement is straightforward, except I don’t find torque specifications. Is 10 ft/lbs or so safe?
I understand I should flush the system out with the old pump in place with the engine ON. Wouldn’t this introduce MORE contaminants in the coolant (with the potential of trapping small pieces in the radiator)? Or should I just drain & refill?