What causes AV belt to squeal?
The belt squeals because there is improper tension in the belt drive system. This is usually caused by a worn automatic tensioner, but other causes can include a contaminated belt (oil, belt dressing, etc.) or a belt that is too long or worn out. If the tensioner is worn, it should be replaced.
Why does my car belt squeal when I start the AC?
If the belt only squeals when you start the car with the AC on, it is probably the belt or the tensioner. If the belt squeals when you turn the AC on after the car it running, it possibly could be something with the AC compressor, but I’d still start with the belt or the tensioner.
What causes a squeal when a V-belt slips?
The alternator, power steering pump, water pump, and air-conditioning compressor may all be connected to this serpentine belt. Older cars may not have a serpentine belt, but they do have different V-belts that drive different systems. When any of these belts begin to slip, the resulting friction can cause a piercing squeal.
Is there a way to stop belt squealing?
Applying an aerosol belt dressing is as easy as it seems. All you need to do is aim and spray. The catch is that you have to do it with the engine running, so be very careful!
Do you have to have the belt off to turn the compressor?
You don’t have to have the belt off to turn the compressor. Just turn the outermost part of the magnetic clutch. That part is connected to the compressor shaft. The clutch free wheels when not engaged.:smile:
What to do about belt squealing when AC starts?
You cold likely adjust that belt to stop the noise. It is slipping ever so slightly, but if the belt has 100K on it then replacing it is wise as it is due. Losing the belt while commuting is far more expensive than simply replacing it.
The alternator, power steering pump, water pump, and air-conditioning compressor may all be connected to this serpentine belt. Older cars may not have a serpentine belt, but they do have different V-belts that drive different systems. When any of these belts begin to slip, the resulting friction can cause a piercing squeal.
Why does my AC belt make a loud noise when I Turn on the AC?
Squealing noises when AC is on One of the most obvious signs that a belt needs to be replaced is that it will produce a loud squealing noise when the AC is turned on. In some cases, this may be attributed to a loose belt, or perhaps water or oil contamination.
When do you Know Your AC belt needs to be replaced?
1. Squealing noises when AC is on. One of the most obvious signs that a belt needs to be replaced is that it will produce a loud squealing noise when the AC is turned on.