How do you replace water pump on 1986 Mazda rx7?

To replace the water pump on a 1986 Mazda RX-7, first, disconnect the battery and drain the coolant from the radiator. Remove the drive belts, then detach the water pump by unbolting it from the engine block, ensuring to also remove the timing cover if necessary. Clean the mating surfaces, install a new gasket or sealant, mount the new water pump, and reassemble everything in reverse order. Finally, refill the coolant and check for leaks before starting the engine.