Toyota 17141-21130 Exhaust Manifold

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To remove the Exhaust Manifold, jack up the front of the car and support it on axle stands. Remove the bolts securing the manifold lower support bracket and disconnect the oxygen sensor wiring. Lower the front part of the exhaust and remove the heat shield. Unscrew the bolts and nuts securing the manifold to the cylinder head and carefully withdraw it. Recover the manifold gasket. When refitting, use new gaskets for the manifold-to-engine pipe and manifold-to-head joints. Use new nuts and clean the threads if reusing old studs and bolts. Tighten all fittings to the specified torque.

A substantial loss of power could indicate a blocked catalytic converter, which may require replacement.