99 Taurus - intermittent tone/hum/squeal.

Reply

  #1  
Old 01-03-05, 05:42 PM
Member
Thread Starter
Join Date: Oct 2004
Posts: 51
99 Taurus - intermittent tone/hum/squeal.

This is a '99 Taurus wagon with standard issue V6. Lately I'm hearing an intermittent tone/hum/squeal, a little over 60 cycle freq, and am wondering what's the cause. It seems to be speed/RPM related, always above 20mph and at various speeds. Since it's never there at idle, it makes for difficult isolation/diagnosis.
 
Sponsored Links
  #2  
Old 01-03-05, 06:43 PM
hogfan's Avatar
Member
Join Date: Oct 2003
Posts: 352
Noise Vibration and Harshness

How did you determine the hertz or frequency just curious? Hoot - a steady low frequency (50-500hz) sounds like blowing over a long neck bottle. Drumming - (20-100hz) rhythimic noise often accompanied by a sensation of pressure on the ear drums,also described as a low rumble,boom or rolling thunder. Roughness - a medium - frequency vibration, a slight higher frequency (20-50hz) than a shake.This type vibration is ussually related to driveline components.
 
  #3  
Old 01-04-05, 12:22 AM
z999
Visiting Guest
Posts: n/a
Check the tyres to see if there is the same amount of tread between front and rear pairs. If not this can cause a rumbling noise.
 
  #4  
Old 01-04-05, 07:38 AM
Member
Thread Starter
Join Date: Oct 2004
Posts: 51
Sounds like I seriously underestimated the frequency of this "noise". It's closer to that of the old fashioned police sirens - starts with a bit of a warble then steadies. Some days nothing then it'll kick in around 50mph while, others, it's there as soon as you pass 25mph. No alternator symptoms - electrical load makes no difference but, from what I've read, anything involved with the serpentine belt could be suspect.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes