Skip the auto shop - Our mechanics make house calls

Q: My water pump pulley won't spin, making the serpentine belt squeak & start smoking. Do I replace the water pump or just the pulley?

asked by on

My car started squeaking and making loud noises and soon after my serpentine belt snapped and i replaced it but when i cranked the car it ran fine for about 10 secs then started squeaking again and smoking. After a few times i noticed the water pump pulley was not spinning causing friction on the belt which caused the smoke. So do i just replace the water pump pulley or just go ahead and replace the water pump? Also if i replace the water pump is it necessary to replace the water pump pulley as well or can i use the same one ?
My car has an automatic transmission.

Hi. Usually there is nothing wrong with the actual pulley when this happens. In most cases, the water pump is binding up, causing the pulley to stop spinning. Replacement of the water pump will fix your problem. The pulley will need to be replaced if there is damage from the belt on it. If there is no damage, then the pulley can be reused.

I suggest you have a certified technician, such as one from YourMechanic, come and replace your water pump and check for any additional damage.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • My water pump pulley won't spin, making the serpentine belt squeak & start smoking. Do I replace the water pump or just the pulley?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine shuts down suddenly, battery red warning light on

I would say the tensioner was overlooked on the last repair and the oil pressure switch may have been damaged in the repair process. I would recommend having the repairs done, but ask for the old parts to see if...

Q: Fuel and temperature gauges broken

Hello. There are a couple of reasons why this could be happening. One being that the instrument cluster is malfunctioning where the fuel gauge and temperature gauge are located. There is a circuit board on the back of your instrument...

Q: Car has no power

Hello. This can be caused by a number of things. Most of the time it is caused by the timing belt being worn out causing the timing to be slightly off. This is enough to affect the power of the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...