Catalytic Converter

If excessive exhaust system back-pressure is suspected, remove the catalytic converter from the car and make a visual check for plugging, melting or cracking of the catalyst. Replace the catalytic converter if more than 50% of the visible area is damaged or plugged.

CATALYTIC CONVERTER — Removal Installation, section 5. Inspect housing for cracks or other damge. Inspect element for clogging by looking through the inside.