Toyota 17150-0P040 Left Exhaust Manifold Sub-Assembly

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Disconnect the negative battery cable and raise the vehicle on jackstands. Remove the lower splash shields and apply penetrating oil to the exhaust pipe bolts. Remove these bolts and separate the exhaust pipe from the manifold, taking care not to damage the oxygen sensor. Remove the lower exhaust manifold braces and oxygen sensor connectors. In the engine compartment, remove the upper heat shield and detach the manifold and gasket. Scrape off old gasket material from the manifold and cylinder head. If the gasket leaks, replace the warped manifold. Position a new gasket over the cylinder head studs, noting any directional marks. Install the manifold and tighten the nuts/bolts from the center out. Reinstall the remaining parts in reverse order and check for exhaust leaks after running the engine.

Check with a dealer service department.

Emissions-related components such as the catalytic converter.

For manifold reinstallation:Install the manifold and thread the mounting nuts into place.Tighten the nuts or bolts in three or four equal steps, working from the center out.

Tighten them a little at a time, working from the center nuts outward, to the torque.

The initial steps before removing the exhaust manifold are as follows:Disconnect the cable from the negative battery terminal.Raise the front of the vehicle and securely support it on jackstands.Remove the lower splash shields.

Evenly loosen the nuts.

The first step is to disconnect the negative cable from the battery. Additionally, it's recommended to spray penetrating oil on the exhaust manifold fasteners and allow it to soak in.

Check with a dealer service department before replacing the converter, as there is a federally mandated extended warranty that covers emissions-related components, including the catalytic converter.