Kia 285103CYE0 Exhaust Manifold Catalytic Assembly, Left

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All engines are equipped with exhaust manifold/catalytic converter assemblies; on 2005 and earlier models, the catalytic converters can be unbolted from the exhaust manifolds. Begin by disconnecting the cable from the negative terminal of the battery. Spray penetrating oil on the exhaust manifold fasteners and allow it to soak in. Raise the front of the vehicle and support it securely on jackstands, then remove the engine's splash shield. Disconnect the oxygen sensor electrical connector on the top of the manifold(s); if replacing the manifold, remove the oxygen sensor. Remove the exhaust manifold heat shield and the exhaust manifold brace, if equipped. Remove the nuts retaining the exhaust pipe(s) to the exhaust manifold(s) or catalytic converter(s). Unbolt the exhaust manifold(s) from the cylinder head(s), working from the ends toward the middle, and slip the manifold(s) off the mounting studs. Carefully inspect the manifold(s) and fasteners for cracks and damage. Use a scraper to remove all traces of old gasket material and carbon deposits from the manifold and cylinder head mating surfaces. If the gasket was leaking, check the manifold for warpage on the cylinder head mounting surface by placing a straightedge over the surface and trying to insert a feeler gauge; if the clearance exceeds the limit, have the manifold resurfaced at an automotive machine shop. Position a new gasket over the cylinder head studs, install the manifold(s), and thread the mounting nuts into place. Working from the center out, tighten the nuts to the specified torque in three or four equal steps. The remainder of installation is the reverse of removal, using new gaskets when connecting the exhaust pipes. Finally, run the engine and check for exhaust leaks.

Unbolt the exhaust pipe from the bottom of the catalytic converter, disconnect the rubber exhaust pipe supports under the vehicle, and carefully lower the front of the pipe for access to the catalytic converters.