Question about BMW 318
Car screeches when turned on and when idling. It lasts 20-30 minutes then goes away slowly. Not sure if I should tighten a belt or which belt to tighten
It might not need to replace the belt but to adjust (tighten) them. Check for a loose one and adjust it. Does the noise changes or stops if the AC is on or off? Or if you turn your steering all the way to either side?
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
SOURCE: Screeching sound from engine
I can pretty guarantee you it is your altrnator belt.. By turning on your headlights, it creates more load on the alternator, which in turn makes the belt work harder. To confirm, you can try some silicone spray on the belt. The noise should change or disappear. This happens a lot in winter when dirt gets on the belts.
Usually that will solve it. If not, you may have to get the belt changed.
Posted on Feb 28, 2009
Remove the belt and check all pulleys for smooth operation. any binding at all is amplified when belt tension is applied. also check the belt itself...If it's glazed or dried out, it can be noisy.
Posted on Apr 07, 2009
SOURCE: screeching, annoying sound
Not without tools you won't .... I would say your local shop will fix it in less than 30 minutes and less than $50 total if it needs a belt. If it just needs tightening bring a pizza at lunch time they may fix it for lunch! A good relationship with a good mechanic is a wise investment.
Posted on May 01, 2009
if it gets louder when the lights are on that means its the alternator belt,and you will have to look under the alternator there you will find the manual tensioner you have to loosen the mounting bolt in order to tighten it with the long tensioner bolt.
Posted on Apr 04, 2010
Testimonial: "Very helpful. Thanks a lot."
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