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We have a chirping sound under the hood all the time

Tiny
PDUFFY
  • MEMBER
  • 2001 FORD TAURUS
  • 147,000 MILES
Nothing seems to make it any better or any worse what is the cause of this noise?We have changed idler tension pulley and the idler pulley it is the same as it was before we changed anything on it. Our mechanic looked at it after we changed the pulleys and he did not know we had and he still said it was the pulley
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Sunday, September 18th, 2011 AT 8:56 PM

3 Replies

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
More than likely the belt is taking some time to, "break in", to the pulley. Just like a chain and sprocket the belt and pulley are going or may never break in to match each others' surface.
When you put a new rear sprocket on a motorcycle or bicycle, you have to get a new chain. If you don't, the chain skips over the sprockets' teeth. This is because the chain is broken in to where it will only work with the original sprocket because therre surfaces match.
The belt is squealing on the pully from vibration which cause noise. There is nothing really mechanically wrong, just irritating.
You can go to an auto parts store and find, "Belt Dressing", wich helps break-in and quiets the belt noise.
Also, remeber you might want to check the tension in the belt to make sure that is not the issues.
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Sunday, September 18th, 2011 AT 9:42 PM
Tiny
BADCOMPANY1969
  • MEMBER
  • 1 POST
Sounds like the camshaft positioning sensor came apart
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Tuesday, September 20th, 2011 AT 3:30 PM
Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
If that were happening it would not run or have serious performance issues.
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Tuesday, September 20th, 2011 AT 8:48 PM

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