Q: How Do I Replace the Water Pump?A: To replace the water pump, start by disconnecting the negative battery cable. Drain the cooling system and save the coolant if it's in good condition. Remove the drivebelt and then the timing belt along with the timing belt tensioner. Take out the water pump mounting bolts and detach the pump from the engine, checking the impeller on the backside for corrosion or missing fins. Ensure that the bolt threads and threaded holes in the engine are free of corrosion. Compare the new pump to the old one to ensure they're identical. Clean the engine mounting surface and remove any traces of the old O-ring. Place a new O-ring into the groove of the new pump and carefully attach the pump to the engine, threading the mounting bolts finger tight while ensuring the dowel pins are in their original positions. Tighten the bolts without overtightening to avoid distortion and leakage. Reinstall all parts that were removed for access to the pump. Refill the cooling system, adjust the drivebelt tension, and reconnect the battery. Run the engine and check for any leaks.