Toyota 17140-0P040 Right Exhaust Manifold Sub-Assembly

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Disconnect the negative cable from the battery. Spray penetrating oil on the exhaust manifold fasteners and allow it to soak in. Remove the heated oxygen sensors from the front and rear manifolds. Remove the EGR pipe from the rear exhaust manifold and cylinder head. Remove the nuts retaining the exhaust pipes to the front and rear exhaust manifolds. On the front manifold, remove the two bolts securing the manifold support bracket. Disconnect the electrical connector from the oxygen sensor at each manifold. Remove the bolts and the heat shield over the exhaust manifolds. Unbolt the exhaust manifolds from the cylinder heads, working from the ends toward the middle, and slip them off the mounting studs. Carefully inspect the manifolds and fasteners for cracks and damage. Use a scraper to remove all traces of old gasket material and carbon deposits from the manifolds and cylinder head mating surfaces. If the gasket was leaking, check the manifolds 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 new gaskets over the cylinder head studs. Install the manifolds and thread the mounting nuts into place. Working from the center out, tighten the nuts. Reinstall the remaining parts in the reverse order of removal. Use new gaskets when connecting the exhaust pipes. Run the engine and check for exhaust leaks.

Remove the upstream oxygen sensor(s) and then remove the exhaust manifold(s).

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.

Be sure to spray the nuts on the exhaust flange studs before removing them from the catalytic converter.

Check with a dealer service department.

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

After the bolts have soaked, they should be removed.

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.