Patriot 2WD L4-2.0L (2008)
Catalytic Converter: Procedures
INSPECTION
WARNING: The normal operating temperature of the exhaust system is very high. Therefore, never attempt to service any part of the exhaust
system until it is cooled. Special care should be taken when working near the catalytic converter. The temperature of the converter rises to a
high level after a short period of engine operation time.
Check catalytic converter for a flow restriction. See: Engine, Cooling and Exhaust/Exhaust System/Testing and Inspection/Exhaust System Restriction
Check Exhaust System Restriction Check for procedure.
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.
