Water Pump Shaft Seal Leak

If the gasket fails either from age or damage from dirty coolant you will see a leak where the water pump bolts to the block or timing cover.

Water pump shaft seal leak.

The need for mechanical seals. All seals leak they have to in order to maintain a fluid film over the entire mechanical seal face. Typically seals leak more during dynamic operation than in a static condition under fluid pressure. And lastly a leak can occur where the electric motor attaches to the pump.

The shaft seal is a sealing element which seals the rotating shaft of a centrifugal pump where it passes through the non rotating pump casing reducing fluidleakage to atmosphere or the entry of air from outside to a certain level and keeps wear of the sealing faces as low as possible. Often seal face leakage rates will depend on pump motor operating conditions. Water pumps can leak from 2 different places. When the shaft seal fails it allows water to run down the backside of the seal plate through the hole where the motor shaft slides through.

If operating vibration levels are high the shaft suffers from excessive radial or axial movement or is misaligned excessively leakage rates tend to be higher. Replacing the entire water pump is often necessary in putting a stop to the seal leak. Leaking pump shaft seal. A mechanical seal is a device that is used to control leakage between a rotating shaft and a liquid or gas filled vessel.

Some signs are water coming from behind the seal plate and collecting underneath the pump where the motor and wet end meet. Pumps are specially designed and manufactured to cater for a whole range of different applications. The shaft seal or the water pump gasket. Its main responsibility is to control leakage.

High temperatures it is inevitable that at some point the polished rubber surface of the seal will succumb to the high temperatures it is subjected to every time the vehicle s ignition is switched on. A leak here is a common cause of motor failure so it s crucial to address quickly. The reasons why a water pump seal might begin to leak include. The water pump seal prevents water and antifreeze from leaking out and overheating your vehicle s engine.

According to aa1car most water pumps are designed to go 100 000 miles or more but it s not unusual to see leaks occur after 50 000 or 60 000 miles. If the water pump bearings are starting to wear out they will allow the shaft to wobble and coolant will leak out. This is usually a problem with the shaft seal.