2001 Honda CRV Cold engine clunking noise under car when ac

2001 HONDA CRV
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BLUEPETE
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Noises problem
2001 Honda CRV 4 cyl All Wheel Drive Automatic 120000 kilometers

Past 7 months when the engine is cool and I accelerate I hear a clanking noise underneath my car. When the car is warm there is limited noise. Car was checked out by dealer, new trailing arm bushings were installed. It didn't help, I still hear the same clanking sound. Any suggestions would be appreciated.
Dec 1, 2009 at 11:22 PM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi bluepete,

Noise is difficult to diagnose without the physical car but the symptom of the noise being different when vehicle is warmwd up indicates it should not be related to the trailing arms.

It should be engine related and for a vehicle with the mileage and age, the catalytic converter is one of the possible causes.

When engine is cold, try banging the catalytic connverter to check if there are any clanking noise emitted from it. Quite often when internal parts of the catalytic converter deteriorates, they tend to vibrate and emit clanking noises and temperature increase would reduce the noise due to the expansion.
Dec 5, 2009 at 11:21 AM
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