Toyota 17150-31010 Left Exhaust Manifold Sub-Assembly

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Run the engine and check for exhaust leaks.

The electrical connectors from the upstream oxygen sensors should be disconnected.

1. Raise the vehicle and place it securely on jackstands. 2. Disconnect the electrical connectors from the downstream oxygen sensors. 3. Spray the nuts on the studs of the exhaust flange and the nuts on the upper flanges of the front exhaust pipe assembly with penetrant. 4. Remove the nuts from the upper flange at the lower end of the right exhaust manifold. 5. Remove the nuts and bolts from the flange where the right catalyst assembly is connected to the left unit and the bolts from the rear flange.