1998 Chevy Silverado CATLYTIC CONVERTER

1998 CHEVROLET SILVERADO
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D_WILLINGHAM
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Engine Mechanical problem
1998 Chevy Silverado V8 Two Wheel Drive Automatic

My catalytic converter needs replacing. What causes the catalytic converter exterior to become dark?
Jun 28, 2010 at 11:34 AM
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BLUELIGHTNIN6
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cat. converters rarely fail and the exhaust piping and converter will become dark due to the amount of heat it undergoes..that does not mean it needs replaced. the oxygen sensors should be replaced before repacing cat. coverter.
Jun 28, 2010 at 11:36 AM