• Tiny
  • cjbalcrj
  • 1999 Chevrolet Astro
  • 12,400 miles

My wife and I went to look at a 1999 astro for sale. It makes a fairly loud tapping noise when running and the serpentine squeals. Could this two separate issues or maybe just a bad tensioner?

Wednesday, October 10th, 2012 AT 8:19 PM

1 Answer

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

That would depend on where the tapping noise is coming from. If it is from belt area, it could be a worn serpentine belt. If noise is internal of engine, that could be bad valve lifters or even engine mechanical fault.

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Wednesday, October 10th, 2012 AT 8:30 PM

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