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Old 06-22-2005, 04:01   #1 (permalink)
Teknical
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Tracking down noise in 97 Taurus

97 Taurus ~120,000 miles, 3.0 vulcan engine.

At idle in gear, the car makes a "buzzing" noise from the front of the car,
sounds like a heat shield slapping around, but I can't see anything
obviously loose. If you take it out of gear or touch the gas pedal, it goes
away. Also, if I put the AC on, the noise changes to a random metallic
clang/tap along with the buzzing, like hitting a wrench against a piece of
metal. Again, only at idle in gear, and it goes away as soon as I hit the
gas a touch. The AC functions fine, IE blows very cold air.


I haven't ruled out the heat shield issue, but the totally different (and
much louder) noise when the AC compressor engages makes me wonder.

Any guesses?



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Old 06-25-2005, 13:01   #2 (permalink)
Teknical
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Re: Tracking down noise in 97 Taurus -update-

Turns out the noise is the serpentine belt slapping around at idle, it's not
under enough tension. Would this be due to belt stretching generally, or am
I likely to need to replace the tensioner? (ie, is the tensioner failing a
common problem). The belt looks fairly old (maybe even original, I haven't
had this car that long).


"Teknical" <teknical@gmail.com> wrote in message
news:dR9ue.2247$X57.369535@news20.bellglobal.com...
> 97 Taurus ~120,000 miles, 3.0 vulcan engine.
>
> At idle in gear, the car makes a "buzzing" noise from the front of the
> car, sounds like a heat shield slapping around, but I can't see anything
> obviously loose. If you take it out of gear or touch the gas pedal, it
> goes away. Also, if I put the AC on, the noise changes to a random
> metallic clang/tap along with the buzzing, like hitting a wrench against a
> piece of metal. Again, only at idle in gear, and it goes away as soon as I
> hit the gas a touch. The AC functions fine, IE blows very cold air.
>
>
> I haven't ruled out the heat shield issue, but the totally different (and
> much louder) noise when the AC compressor engages makes me wonder.
>
> Any guesses?
>
>
>



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Old 06-26-2005, 05:01   #3 (permalink)
MasterBlaster
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Re: Tracking down noise in 97 Taurus -update-


"Teknical" wrote

> Turns out the noise is the serpentine belt slapping around at idle, it's not
> under enough tension. Would this be due to belt stretching generally, or am
> I likely to need to replace the tensioner? (ie, is the tensioner failing a
> common problem). The belt looks fairly old (maybe even original, I haven't
> had this car that long).


Spring-loaded tensioner? Should be indicator marks on it showing when the
belt has stretched enough to be replaced.

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