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1999 Toyota Tacoma upper timing belt idler

Tiny
DBAUMAN
  • MEMBER
  • 1999 TOYOTA TACOMA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
Scraping noise
installed new one, noise stayed the same.
Removed it and installed another one, noise came back in two days.
I ran stethoscope on all the pulleys and this is the only one making the noise.
Is this a common problem?
What could be making this pulley make the grinding sound?
Is there something else I can do to repair it or stop the noise?
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Saturday, March 14th, 2009 AT 8:17 AM

4 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
To go through 3 of them is odd, are you sure the noise isnt transfering to that point? Did you check the tensioner wheel? Water pump maybe?
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Saturday, March 14th, 2009 AT 8:26 AM
Tiny
DBAUMAN
  • MEMBER
  • 3 POSTS
It is quiet all around the water pump and the other pulleys. I replaced the timing belt and the bottom idler pulley. I can hear the noise on the crossover exhaust pipe with the stethoscope but the sound is really pronounced on the center bolt on the idler pulley. The idler pulleys I have removed are still smooth and turn easily. The sound gets quiet for a little while but comes right back. It doesn't seem to hurt anything but the sound is driving me nuts.
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Saturday, March 14th, 2009 AT 10:26 AM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Is it possibly an accessory transfering noise? Maybe a cover rubbing?
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Saturday, March 14th, 2009 AT 11:09 AM
Tiny
DBAUMAN
  • MEMBER
  • 3 POSTS
Thank you very much for your trouble in answering my questions, I really appreciate it. The noise must be inside the engine
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Sunday, March 15th, 2009 AT 8:03 AM

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