3 Water Pump FAQs
Here are some of the most common queries about water pumps and water pump replacement cost, as well as their answers.
1. What Is A Water Pump?
A water pump is a mechanical impeller pump which is a device used to increase the pressure and flow of fluid.
You can find the water pump underneath the timing belt. That’s why experts advise replacing the water pump when you get your timing belt changed.
The water pump plays a key role in your vehicle’s cooling system by circulating coolant from the engine to the radiator. This protects the engine and other essential parts from overheating.
2. How Does The Water Pump Work?
When you start your engine, the fan belt and the water pump’s central axis also begin to turn — creating a centrifugal force. This force creates a suction that allows the pump to receive coolant from the radiator and send it to the engine.
The coolant absorbs the engine heat before it travels to the radiator, which cools the coolant again.
Usually, the water pump can move around 7500 gallons every hour. However, the water pump adjusts its speed according to how fast the engine runs. It does so to absorb the heat that increases with engine speed — ensuring that the engine maintains normal temperatures.
3. How To Replace A Water Pump?
Each engine model may have its own belt drive system or water pump replacement steps. So it’s better to call an expert to help you replace or repair the water pump system.
Here’s how you can replace the water pump:
- Disconnect the battery and wait until the engine cools down.
- Raise the car using a jack and jack stand. Place a fluid catch pan under your car before you remove the radiator cap.
- Proceed to drain the old coolant by lowering the radiator hose (safest method) or opening the radiator drain petcock.
- Use a ratchet or a wrench to loosen the water pump pulley retaining bolts. If the pulley starts to spin, put extra pressure on the belt tensioner to hold it in place.
- Next, rotate the automatic tensioner to remove the drive belt. If your vehicle has a manual drive belt tensioner, loosen the lock nut before turning the adjuster screw.
- Unscrew the water pump bolts and the pulley.
- Once done, remove the water pump slowly. If it doesn’t come off easily, tap the pump with a dead blow hammer.
- Remove water pump pulley retaining bolts. Then use brake cleaner to clean the water pump mating surface.
- After you mount the new gasket or seal in place on the water pump, install the new water pump and gasket.
- Reinstall the pulley bolts and tighten them after you fix the drive belt.
- Finally, bleed the cooling system and refill it with coolant according to the manufacturer’s instructions.
- Ensure your car engine doesn’t overheat by starting the engine and monitoring the temperature gauge.