Q: after replacing belt, idler pulley, and tensioner pulley tahoe still sqeaks in the morning?

asked by on

My mechanic had me replace the serpentine belt, the idler pulley, and the tensioner pulley but my tahoe still squeaks int he morning as though it has a belt issue. It stops once it has warmed up (dew has dried off). What else could it be? It doesn't get louder as i am driving or accelerating(like a drive shaft would do), it does it in idle as well as when driving (like as though I needed to replace the belt.)

My car has 150000 miles.
My car has an automatic transmission.

At the next cold start, try this: Take a spray bottle with some water and spray the belt then start it. If you hear the noise, then the problem may not be with the belt or tensioner. If you do hear it, then it’s possible that one of the pulleys (a/c,water pump,etc) may be slightly glazed or out of round. It’s also possible that a bearing, such as in the water pump, alternator, or a/c compressor clutch may be the issue. Sometimes a bearing that is on it’s way to failure can squeal when cold until it warms up. Alternator bearings are a common source. A mechanics stethoscope may be a good tool to locate a squealing sound. Since the noise is primarily on a cold start, the vehicle may need to sit for several hours or even overnight to get the noise to occur and found with the stethoscope.

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. after replacing belt, idler pulley, and tensioner pulley tahoe still sqeaks in the morning?

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: The truck wasn't starting up or making any noise. I replaced the starter and it still doesn't want to start up. It just makes a clicking noise

Hey there. You have a bad battery or there is a bad connection in the starting system. The battery should be load tested and the state of charge should be checked with a hydrometer. Your starter requires about ten times...

Q: How many oxygen sensors do I have on my 2008 Cadillac Escalade EXT?

Hi there - your Escalade has 4 oxygen sensors total, 1 before each of the two catalytic converters, and 1 after each catalytic converter. Diagnostic codes are usually pretty specific as to which one is malfunctioning (i.e. Bank 1, Sensor...

Q: Q: Traction Control and ABS lights on

Hello there! The illumination of these warning lights indicates a system shutdown because of some malfunction. Since the Traction Control and ABS systems share many sensors, the fault may have to do with a sensor that is tied to both...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.