With the engine off, open your hood and locate the water pump pulley. With gloves on, grab it and wiggle it back and forth. There should be no movement, if there is, this along with the noise is a good indication you may have a water pump problem.

How do I know if the water pump is bad?

Can you test a water pump?

You may loan a tester from your local auto parts store. This is a simple hand-operated air pump. With the engine off, install the tester cap in place of your radiator cap and start pressurizing the system by squeezing the pump handle. The pump comes with a gauge so you know how much pressure you're applying.

What happens when water pump fails?

When the water pump fails completely, it will not be able to circulate coolant through the engine block. This results in an overheating situation and if not repaired or replaced quickly, can cause additional engine damage like cracked cylinder heads, pushed head gaskets, or burnt pistons.

Related Question how to test water pump in car

Will Heat Work If water pump is bad?

Yes, a bad water pump can cause no heat. This is because the water pump is what circulates the coolant through the engine and heater core. If it has failed, it is unable to pump the coolant properly, resulting in little to no coolant circulating through the vehicles heater core causing no heat.

How do you reset a water pump?

  • Shut off the breaker switch to cut power to the pump.
  • Remove the cover cap from the cut-off switch by loosening the cap nut over the plastic box by hand or with a pair of pliers.
  • Clean off the contacts with an old toothbrush to remove any debris or dead insects.
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