Just this past weekend my engine started knocking and has only gotten worse, what is the cause?

2004 GMC ENVOY
91,000 MILES
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STEVENMKING2
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It sounds like a card in the spokes of a bike tire and gets faster and louder with the increase of speed and RPM's, it is constant from start up to engine shut off.
Nov 1, 2011 at 7:11 AM
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ASEMASTER6371
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could be internal or external. in this forum, it would be almost impossible to determine the noise without hearing it.

remove the serpentine belt and see if the noise is still there. it may be an external failure. if not, then you have an internal failure.

Roy
Nov 1, 2011 at 7:30 AM
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STEVENMKING2
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If it is an internal problem, what am I looking at it being?
Nov 1, 2011 at 9:21 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
bearings, pistons or something broken. whatever it is would be major. if it is internal, i would consider a rebuilt motor.

Roy
Nov 1, 2011 at 9:39 AM
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