Skip the auto shop - Our mechanics make house calls

Q: Fan belt making noise

asked by on

My fan belt is making noise.

Hello. If your belt is making noise, there are several possible causes. First, inspect the belt tension and automatic tensioner to determine if they are putting adequate pressure on the pulleys, and not slipping. If the tension is poor, it may be because of a worn or stretched belt, or the automatic tensioner is worn-out. If the tension on the belt is good, then the noise could be a very worn belt; you can check for this by twisting the belt to inspect the grooves on the inside for cracks in the rubber, or pieces missing from the grooves on the belt. Beyond this, check for noise change with the AC on and off. If it changes, you may have a problem with the compressor, or the system is overfilled. The alternator must be checked as well; if it has a bad diode, it can cause excessive electricity amperage, and a heavy load, which will cause the belt to slip on the pulley. Most of these problems require taking your vehicle to a qualified technician to determine the source of the noise, and repair it.

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

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: how van i tell if i need a new reservoir tank or check the sensor

Hi there: Of all the components of the coolant system, the reservoir tank is one of the most durable. However, there are a few warning signs of a bad reservoir tank that you should consider. First, if you notice any...

Q: Car wont remain running when you take your foot off the gas.

Hi There, What you are describing sounds like you may have a dirty or faulty idle air control valve or potentially a bad throttle position sensor. The idle air control valve monitors the air intake as it is mixed with...

Q: Can you car still run if the ac compressor belt breaks

Hello. The car will not successfully run without a serpentine belt. The car may continue to run for a moment if the ac compressor belt breaks, but not for long. The belt also powers the alternator, which supplies engine with...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.