Toyota 17410-31450
Front Pipe

Begin by installing a new gasket onto the exhaust manifold RH before installing the front exhaust pipe with its two new nuts torqued to 54 Nm (554 kgf-cm, 40 ft-lbf). Next apply a new gasket to the front exhaust pipe and use a wooden block with plastic-faced hammer to firmly tap it into place while checking the gasket orientation and never using the removed gasket. The installation of the No. 2 front exhaust pipe begins by adding new gaskets to the exhaust manifold LH and the No. 2 front exhaust pipe then securing them with two new bolts and nuts before applying torque to each component according to specified values. Follow this step by installing the exhaust pipe stopper bracket using 2 bolts (for 4WD) at the required torque setting. Test the compression spring free length in the center exhaust pipe with vernier calipers to verify it exceeds 40.5mm (1.594 in.); if the measurement is insufficient, replace the spring with a new one. The center exhaust pipe installation requires secure attachment to 4 exhaust pipe supports which consists of 2 bolts and 2 springs tightened to 43 Nm (438 kgf-cm, 32 ft-lbf). The procedure continues with installation of a new gasket on the center exhaust pipe which then requires attachment of the tail exhaust pipe by two bolts and an exhaust pipe support that needs torque at 48 Nm (489 kgf-cm, 35 ft-lbf). The oxygen sensor installation starts with attaching it to the exhaust system and connecting the cable to the negative battery terminal before final torque application reaches 3.9 Nm (40 kgf-cm, 35 in-lbf). The inspection should include a check for exhaust gas leaks as the last step.

Disconnect the heated oxygen sensor connector for Bank 2 and remove the heated oxygen sensor.

Repeat the process for the heated oxygen sensor for Bank 1, applying the same torque specifications and wire check.

Take out the 2 bolts, exhaust pipe support, and tail pipe.

Install a new gasket and secure it with 2 nuts torqued to 62 Nm (630 kgf/cm, 46 ft. lbs.).

Install a new gasket and the front pipe to the exhaust manifold, securing the exhaust pipe front with 2 nuts at a torque of 62 Nm (630 kgf-cm, 46 ft. lbs.).

Install a new gasket on the exhaust pipe assembly front and secure the center assembly with 2 bolts and 2 springs, torqued to 43 Nm (440 kgf-cm, 32 ft-lbf).

Install the exhaust pipe stopper bracket with 2 bolts (for 4WD) torqued to 19 Nm (193 kgf-cm, 14 ft-lbf).

Place a new gasket onto the front exhaust pipe, ensuring it is flush with the end using a wooden block and plastic-faced hammer, and do not reuse the removed gasket.

Remove the heated oxygen sensor.