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Vehicle water pump



The water pump is an engine accessory bolted to the engine, above the crankshaft pulley. It is driven by a belt or chain and circulates engine coolant through the cooling system passageways in the engine block and cylinder head, on to the radiator, where the coolant temperature is reduced. Once the coolant is reduced, it flows back to the water inlet on the engine and the water pump continues the cycle.

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Signs it's time to replace your car's water pump

  • The coolant is either leaking or ovehearting Bearings support the water pump impeller shaft. Gradually the seal or the bearing can wear out damaging the impeller. Several water pumps have to weep holes situated near the bearings of the pump so if you come across a significant leakage from the weep hole, it’s a clear sign of car leaking water.
  • The bearing is making noise. If there is a disruption in the running of the water pump shaft, the bearing wears out excessively and it makes a noise. In this case, it is essential to replace the pump to avoid the car leaking water.
  • You are replacing your timing belt. The timing belt drives the water pump in engines so it makes sense to replace them simultaneously. This way you will save time and money as it is simpler to replace the water pump when the components of timing belt are removed for a better scheded belt replacement.

What to expect during a water pump leak inspection

The replacement procedure will vary depending on whether the pump is driven by the timing belt, the serpentine belt, or chain.

  • On a cold engine, the engine coolant is drained to a level below the water pump.
  • Parts that need to be removed to access the water pump are removed, including the belt or chain that directly drive the pump.
  • The bolts holding the pump to the engine are removed and the pump is pulled out.
  • The gasket surface is cleaned and the pump mounting surface is inspected. If necessary, a new gasket, rubber seal, or RTV sealant, is installed and then the new pump. The bolts are torqued in sequential order using a calibrated inch pound torque wrench.
  • In cases where the water pump is driven by the timing belt, the timing belt must also be removed. Generally, this involves removing the crankshaft pulley, timing belt covers, and timing belt tensioner. After installing the new pump, new coolant is added and all air is removed from the cooling system. The mechanic will then run the engine bring it to normal operating temperature to check for leaks and ensure that the engine temperature is normal.

Is it safe to drive with a water pump problem?

No. If the water pump is only leaking a little bit, it’s O.K. to drive the car. However, a small leak can quickly enlarge or the pump bearing might unexpectedly seize, which would likely cause the engine to overheat and severely damage the engine.

Coolant Leak Inspection

Radiator repair

Coolant is likewise referred to as antifreeze. It is a radiant yellow or green fluid that blends with the water in varieties of vehicles to maintain the radiators from getting too cold or getting too hot. It is made from either propylene glycol or ethylene glycol. Antifreeze, as well as coolant, alters the freezing and boiling points of water.

Coolant elevates the boiling point of the liquid in the engine to avoid overheating.

What causes coolant leaks?

  • Perforated radiator tank or core. This is rather very easy to detect as there will certainly be indications of leakage around the radiator.
  • Poor conditioned radiator hoses. The hoses attaching the radiator to the engine can also weaken as well as generate leakages from as small as a pinprick puncture to a full-on ruptured wall surface. Hoses normally end up being fragile and weak as they get old, making them susceptible to failure. If they are discovered as malfunctioning, hoses will certainly be required to be changed.
  • Damaged water pump. Coolant can also break loose from the water pump housing. Typically, the pump seals fall short adhering to the bearing of failing. This occurs mainly when the pump is running, so the mechanic will look for this with the engine operating. The pump will surely be required to be changed if this is the source of the leakage.
  • Defective radiator cap. It is also feasible for the radiator cap to shed its capacity to keep its system pressure. This will enable the coolant to reach its boiling point at a reduced level of temperature than intended, as well as potentially permit the vapor to get away, which presents dampness to the system.

How important is this service?

When engines get too hot as a result of a failing cooling system, it can lead to disastrous engine damage. It is certainly important to have the automobile inspected immediately if you observe an unusual level of temperature or even see liquids on the ground under the engine compartment of your vehicle. You can conserve a great deal of cash by solving issues as early as you can in connection with your air conditioning system.