Toyota 17140-31730 Right Exhaust Manifold Sub-Assembly

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The catalytic converter is an emission control device that reduces pollutants in the exhaust gas stream. It consists of two types of catalysts, the oxidation catalyst and the reduction catalyst, which work together to reduce hydrocarbon, carbon monoxide, and oxides of nitrogen emissions. If you suspect a malfunctioning converter, it is recommended to have it diagnosed and repaired by a dealer or authorized emissions inspection facility. Regular inspections should also be done for leaks, corrosion, dents, and other damage, and if any damage is found, the converter should be replaced. To check for a restricted converter, a vacuum gauge can be used to diagnose the effect of a blocked exhaust on intake vacuum. If the exhaust system is found to be restricted, the catalytic converter may be plugged and should be replaced. When replacing the converter, the vehicle should be raised and securely placed on jackstands, and the nuts on the exhaust flange studs should be sprayed with penetrant before removing them. The catalytic converters can then be separated from the exhaust system and the new converter can be installed in the reverse order of removal.