Toyota 25052-20090 Exhaust Manifold Converter Sub-Assembly, No.2

Since there was an extended warranty on emissions-related components resulting from a Federally required regulation such as the catalytic converter, it will be wise to seek advice from the dealer's service department before going for a replacement. The catalytic converter serves as an emission control device in the exhaust system, designed to reduce pollutants from exhaust gases, with two types available: the ordinary oxidation cat'. which decreases the emission of hydrocarbon and carbon monoxide and the three-way cat'. which further decreases emission of oxides of nitrogen. Catalytic converters are installed in one of the forms of the depicted type in covered models; one for each bank in V6 engine models' exhaust manifold. A check for a non-functioning converter necessitates the use of expensive equipment and it is suggested that a check and fix be conducted by a dealer or an authorized emission testing center. When performing any underbody servicing, check the converter for any signs of leaks, rust, denting, and general damages usually at the weld area and flange bolts that hold the converter in the exhaust system; any sign of damages should call for change. However, plug converters are uncommon, and restricted converters can happen; a vacuum gauge can be used to fix exhaust limitations. For a restricted converter, attach a vacuum gauge to one of the intake manifold vacuum sources and collect vacuum reading when the engine is warmed and again after jerking the throttle. If there is a considerable varia-tion between the after the fourth test reading and the idle reading, then the exhaust system maybe constricted. For removal, apply the nuts on the studs of flange and then unfasten the flex section from the converter, remove the converter from the exhaust system and then fasten it again in reverse manner.