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CATALYTIC CONVERTERS   Description | Quality | OBDII Testing | Efficiency | Diagnostic Testing | Inspection | TSB's | Converter Failures

CATALYTIC CONVERTER BASICS
INSPECTION

TEMPERATURE
&SHELL DISCOLORATION
Catalytic converter shell coloration is a good indicator of Converter efficiency and light-off. Converter efficiency depends on factors including exhaust gas composition and temperatures Converter internal reactions (Light-off) begin to occur at Exhaust Gas Temperatures between 400 and 800°C. High operating temperatures should be avoided to prevent degradation of the converter. Always note any conditions that may prevent a converter from reaching Light-off temperature.
EXHAUST COMPONENT
INSPECTION
  • Check manifold and exhaust pipes for leaks
  • Check for any physical damage to the converter housing.
  • Inspect O2 sensor wiring to ensure good contact at the connectors and no damage or shorted wires.

UPON REMOVAL OF
CONVERTER
  • Melted substrate
  • Check for missing, cracked or loose substrate
  • Severe discoloration indicating excessive temperature
  • Excessive build-up of carbon, soot or oil on the inside of converter and/or connecting pipes.

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