Skip the auto shop - Our mechanics make house calls

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.

A: Sometimes when the pulley goes bad on the A...

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?

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!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Water leaking into passenger's seat

It is very possible that your sunroof could be leaking water into your vehicle as this is a common problem. I would recommend having your rubber insulation and weather stripping checked to see where the leak is coming from. You...

Q: Thermostat replacement on a 2002 Ford Escort

Yes, if you don't have any problems. If the thermostat has a problem, it will shut. If it shuts, then your temperature gauge will get behind and you'll have to change it; or it will stick right open and your...

Q: My car wants to kind of like jerk going up hills & taking off

This jerking can be coming from a couple of things. A low transmission fluid level from a leak can cause jerking as the fluid pressure inside the assembly cannot remain stable. The transmission fluid can come into contact with the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.