Q: Serpentine belt keeps shredding because of bad pulleys

asked by on

The Serpentine belt on my truck shredded while I was driving. I went and bought a new belt and put it on and less than 10 miles later it shredded again. I took it to a local shop and they said I have a bad idle pulley, bad power steering pump pulley, and the pulley on my a/c compressor is bad. They suggested I replace the entire a/c compressor which ended up costing around 600 dollars. Prior to taking my truck there the a/c worked and blew cold out of the defrost vents but it has never blown out of the front vent . Which leads me to believe I have a vacuum leak because the compressor didn't fix how cold or how much air blew through the vents. My question is did they need to replace the whole compressor if it was just a pulley issue and not an a/c issue?

My car has 140000 miles.
My car has a manual transmission.

Sometimes when the pulley goes bad on the A/C compressor this means the pulley bearing went bad. When this happens, sometimes the bearing seizes and spins on the front of the compressor area where the bearing sits. This will cause damage to the front of the compressor and require replacement. The A/C uses a vacuum system on the vent doors and you should check the vacuum system for leaks near the evaporator case in the engine compartment on the passenger side rear. The system has a small canister that stores vacuum for A/C use. Like you said, you should have a technician look for breaks in the vacuum lines. It would be hard to confirm the issue without looking at this in person. If you want to have this checked out, a technician from YourMechanic can come to your car’s location to diagnose the issue and make the correct repairs.

Was this answer helpful?
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. Serpentine belt keeps shredding because of bad pulleys

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: Lack of power 1991 Nissan 300ZX

Hello and thanks for writing in. There are a number of things that can cause the motor to over fuel or run rich. When this happens, it is usually related to things like faulty fuel injectors, a failing mass air...

Q: My 2016 Ford focus SE keeps dying at stop lights. It'll sputter a little bit and cutoff and the battery light comes on. It'll star

It seems awfully new to be needing a battery. I certainly wouldn't recommend replacing it without having it tested. I would start by focusing on the stalling. Your car is very new to have any kind of mechanical failure. It...

Q: How do you disable the auto lock mechanism on a Ford Explorer 'LIMITED'?

Hi there. The following steps are how to disable the auto lock feature in your vehicle. Confirm that the vehicle alarm is disarmed. Close all the doors. Make sure that the ignition switch is in the 'OFF' position. Turn...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...