Exhaust Manifold: Service and Repair
Exhaust Manifold Removal and InstallationReference: Exhaust System Components
Removal
CAUTION:
Be careful not to drop exhaust manifold. If it is dropped, inside catalytic converter may be damaged on impact.
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.
Installation
Reverse removal procedure noting the following points.
^ Use new gaskets.
^ Install A/F sensor and HO2S if removed.
^ 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 kg-m, 37.0 lbf-ft)
Exhaust manifold nut* (b): 50 Nm (5.1 kg-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 kg-m, 37.0 lbf-ft)
^ Tighten exhaust manifold stiffener bolts in numerical order.
Tightening torque
Exhaust manifold stiffener bolt* (a): 50 Nm (5.1 kg-m, 37.0 lbf-ft)
^ Run engine and check for exhaust gas leakage.