Exhaust Manifold: Service and Repair

Removal and Installation

EM-21 Component:

REMOVAL
1. Remove exhaust front tube.
2. Remove exhaust manifold cover.





3. Remove the A/F sensor 1, using Tool (A).
Tool number: KV991J0050 (J-44626)

CAUTION:
Handle it carefully and avoid impacts.

4. Remove exhaust manifold side bolt of exhaust manifold stay.





5. Loosen nuts in reverse order as shown and remove exhaust manifold.
<---: Engine front

CAUTION:
Cover engine openings to avoid entry of foreign materials.

INSPECTION AFTER REMOVAL

Surface Distortion





^ Using straightedge (B) and feeler gauge (A), check the surface distortion of exhaust manifold mating surface in each exhaust port and entire part.
Limit:
Each exhaust port: 0.3 mm (0.012 in)
Entire part: 0.7 mm (0.028 in)
^ If it exceeds the limit, replace exhaust manifold.

INSTALLATION





1. Install exhaust manifold gasket to cylinder head as shown.
<---: Engine front





2. Tighten exhaust manifold nuts to specification in two stages in the numerical order as shown.
<---: Engine front





3. Install exhaust manifold stay (2) in the direction as shown.
1: Exhaust manifold
A: Upper mark
<---: Engine front





4. Install the A/F ratio sensor 1, using Tool
Tool number: KV991J0050 (J-44626)

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

Tool number: - (J-43897-12)
Tool number: - (J-43897-18)

5. Installation of the remaining parts is in the reverse order of removal.