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
  1. Home
  2. Questions
  3. 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: When idling it over heats but when I press on the gas and bring the rmps up they suddenly drop and my car cools down?

When you accelerate the engine, although you are adding heat, the water pump also spins faster increasing coolant flow through the engine and to the radiator. Perhaps there is an issue with the water pump and/or the water pump drive...

Q: Car needs a new coolant bypass tube

Ah yes, the infamous 3.8L coolant elbows, located on the tensioner. This is a very common problem, but I would still perform a cooling system pressure test to be certain that the elbows are leaking. This test pressurizes the cooling...

Q: why is the new air ride compresser louder than before? 20020 Oldsmobile Bravada

Hi - couple of possibilities for a "louder than before" air pump. If the pump was not securely bolted to the frame when installing it, vibration, and new noise radiates through the frame. If the spare tire, which encloses the...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.