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Failures - Carbon Deposits


Failures - Carbon Deposits

This is an example of a converter with carbon deposits in the ceramic catalyst. This is usually a result of oil or antifreeze entering the exhaust system or a too-rich fuel mixture. The heavy carbon deposit clogs the converter and reduces exhaust flow. 

Why Catalytic Converters Fail?

Failures - Carbon Deposits:

This increases back pressure and causes the entire exhaust system to heat up. The heat backs up into the engine compartment and may result in a number of heat-related engine problems. Mild carbon scoring may do less damage to engine components but it may seriously affect the converter’s ability to reduce harmful emissions. It could easily cause a vehicle to fail an emission test. Carbon deposits may be the result of faulty valves, worn piston rings, worn or leaking gaskets or lead in the fuel.