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Removal and Installation





EXHAUST MANIFOLD


Removal and Installation


REMOVAL

WARNING:
Perform the work when the exhaust and cooling system have completely cooled down.

NOTE:
When removing bank 1 side parts only, step 2, 5 and 10 are unnecessary.
1. Remove engine undercover with power tool.
2. Drain engine coolant. Refer to Draining.
3. Remove engine cover with power tool. Refer to Exploded View.
4. Remove air cleaner case and air duct. Refer to Exploded View.
5. Remove heater pipe and water hose. Refer to Exploded View.
6. Remove exhaust front tube. Refer to Exploded View.
7. Disconnect heated oxygen sensor 2 harness connectors (bank 1 and bank 2) and remove harness clip.





8. Using heated oxygen sensor wrench [SST: KV10114400 (J-38365)] (C), removal heated oxygen sensor 2.

9. Remove three way catalysts (bank 1 and bank 2).
10. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
11. Disconnect air fuel ratio sensor 1 harness connectors (bank 1 and bank 2) and remove harness clip.





12. Using the heated oxygen sensor wrench [SST: KV10114400 (J-38365)] (C), remove air fuel ratio sensor 1 (bank 1 and bank 2).

CAUTION:
- Be careful not to damage air fuel ratio sensor 1.
- Discard any air fuel ratio sensor 1 which has been dropped onto a hard surface such as a concrete floor.
Replace with a new sensor.
13. Remove exhaust manifold cover (upper) (bank 1 and bank 2).
14. Loosen mounting nuts in the reverse order as shown in the figure to remove exhaust manifold.

NOTE:
Disregard the numerical order No. 7 and 8 in removal.





15. Remove gaskets.

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

INSTALLATION
Note the following item, and install in the reverse order of removal.

EXHAUST MANIFOLD GASKET
- Install exhaust manifold gasket in direction shown in the figure.





(Follow same procedure for both banks.)

EXHAUST MANIFOLD
- If stud bolts were removed, install them and tighten to the specified torque below.

Tightening torque: Refer to "Exploded View". Exploded View

- Install exhaust manifold and tighten mounting nuts in numerical order as shown in the figure.

NOTE:
Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7 and 8 shows second step.






AIR FUEL RATIO SENSOR 1, HEATED OXYGEN SENSOR 2

CAUTION:
- Before installing a new sensors, clean exhaust system threads using heated oxygen sensor thread cleaner tool (commercial service tool: J-43897-18 or J-43897-12) and apply anti-seize lubricant.
- Never over torque sensors. Doing so may cause damage to sensors, resulting in the "MIL" coming on.