Removal And Installation

EXHAUST MANIFOLD

Removal and Installation


REMOVAL

1.Remove air duct (inlet), air duct and air cleaner assembly. Refer to "Exploded View" Exploded View.
2.Remove exhaust center tube and front tube. Refer to "Exploded View" Exploded View.
3.Remove the air-fuel ratio sensor harness bracket from the cylinder head on the right rear side.
4.Remove exhaust manifold cover.
5.Disconnect the harness from air-fuel ratio sensor 1.
6.Remove exhaust manifold side bolt of exhaust manifold stay.
7.Remove exhaust manifold.











- Loosen nuts in reverse order as shown.





8.Use Tool (A) to remove the air-fuel ratio sensor 1 (if necessary).
Tool number: KV10117100 ( - )

CAUTION:
- Handle the air-fuel ratio sensor carefully and avoid impacts.
- Before installing a new air-fuel ratio sensor 1, clean the exhaust tube threads using suitable tool and approved anti-seize lubricant.
- If air-fuel ratio sensor is dropped onto a hard surface, such as a concrete floor, from a height of 0.5 m or more, discard the sensor and use a new one.

Oxygen sensor thread cleaner: -(J-43897-12)
Oxygen sensor thread cleaner: -(J-43897-18)
9.Remove exhaust manifold gasket and discard.
10.Remove stud bolt using suitable tool from cylinder head (if necessary).

INSPECTION AFTER REMOVAL

Mounting Surface Distortion





- Using suitable tools (A) and (B), check the surface distortion of the exhaust manifold mating surface as shown.
Limit: Refer to "Exhaust Manifold" [1][2]Exhaust Manifold.
- Replace exhaust manifold if it exceeds the limit.

INSTALLATION

Installation is in the reverse order of removal. Note the following:
Exhaust manifold





1.Tighten nuts in numerical order as shown.
2.Tighten nuts in numerical order to the specified torque again.
Air-fuel ratio sensor 1





- Use Tool (A) to install the air-fuel ratio sensor 1 (if removed).
Tool number: KV10117100 ( - )

CAUTION:
- Handle it carefully and avoid impacts.
- Before installing a new air-fuel ratio sensor 1, clean the exhaust tube threads using suitable tool and approved antiseize lubricant.
- Do not over-tighten the air-fuel ratio sensor 1. Doing so may damage the air-fuel ratio sensor 1, resulting in the MIL coming on.

Oxygen sensor thread cleaner: -(J-43897-12)
Oxygen sensor thread cleaner: -(J-43897-18)

INSPECTION AFTER INSTALLATION

Inspection
- Start engine and raise engine speed to check for exhaust leaks.