Converter, Catalytic: Inspection
Check catalytic converter for a flow restriction. For Exhaust System Restriction Check procedure, refer to DIAGNOSIS AND TESTING .
Visually inspect the catalytic converter element by using a borescope or equivalent. Remove oxygen sensor(s) and insert borescope. If borescope is not available, remove converter and inspect element using a flashlight. Inspect element for cracked or melted substrate.
NOTE:
Before replacing a catalytic converter, determine the root cause of failure. Most catalytic converter failures are caused by air, fuel or ignition problems. Refer to Appropriate Diagnostic Information for test procedures.