Exhaust Manifold Removal and Installation

Exhaust Manifold Removal and Installation

Exhaust System Components

Removal

CAUTION:

Touching a hot exhaust system component will cause a burn.

Do not perform any service work on the exhaust system until the exhaust system is cool.

NOTE:

Applying a shock to the exhaust manifold may cause damage to the three-way catalytic converter inside the exhaust manifold.

Handle the exhaust manifold carefully. Be careful not to drop it or hit it against something.

1) Disconnect negative (-) cable from battery.
2) Remove exhaust manifold cover.

3) Disconnect A/F sensor connector (1) and HO2S connector (2), and then detach them from their brackets.





4) Remove right side engine undercover.
5) Remove exhaust manifold stiffener (1).
6) Remove exhaust pipe No.1 (2).





7) Remove exhaust manifold and its gasket from cylinder head.
8) Remove A/F sensor and HO2S if necessary. Service and Repair

Installation

Reverse removal procedure noting the following points.

- Use new gaskets.
- Install A/F sensor and HO2S if removed. Service and Repair
- Tighten exhaust manifold bolts and nuts in numerical order evenly and gradually to specified torque.

Tightening torque
Exhaust manifold bolt* (a): 50 Nm (5.1 kgf-m, 37.0 lbf-ft)
Exhaust manifold nut* (b): 50 Nm (5.1 kgf-m, 37.0 lbf-ft)





- Tighten exhaust pipe No.1 bolts to specified torque.

Tightening torque
Exhaust pipe No.1 bolt (a): 50 Nm (5.1 kgf-m, 37.0 lbf-ft)

- Tighten exhaust manifold stiffener bolts in numerical order.

Tightening torque
Exhaust manifold stiffener bolt* (a): 50 Nm (5.1 kgf-m, 37.0 lbf-ft)





- Run engine and check for exhaust gas leakage.