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What would cause a high pitched noise that goes away as the car warms up and higher rpm's are applied?
Wiki User
∙ 15y ago
A common high pitched squeal is caused by a loose drive belt. Most modern cars have a wide, flat serpentine belt that wraps around several accessories, like the water pump, the alternator and so on. That belt is kept in constant spring tension so it never has to be adjusted and is not likely to make any noises.
There may also be a smaller "V belt" that drives one or two other accessories. The v-belt is narrow and may have to be tightened once in a while. If it is slipping, it will create a loud squealing noise, and this usually happens when accelerating from low speeds and the engine is cold. It should be tightened right away because each time it slips, it heats up, and heat is what causes rubber components to fail. Most belts are essential so a belt failure can leave you on the side of the road.
It may stop squealing as the car warms up because the rubber gets more flexible when it is warm.
Check an automotive manual or have a mechanic check it/tighten it. It should be a pretty easy and cheap job.
Belts should not be over-tightened either. Over tightening can cause the bearings in the accessories to fail.
In some cases Power Steering pumps can cause strange noises especially when cold. Check that the power steering pump has the correct fluid and correct fluid level. Many modern cars are very picky about what kind of fluid should be added.
Wiki User
∙ 15y ago
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