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, steps 1, 4, and 7 are unnecessary.
1.Drain engine coolant. Refer to "Draining" Draining Engine Coolant.
2.Remove engine cover with power tool. Refer to "Exploded View" Exploded View.
3.Remove air cleaner case and air duct (RH and LH). Refer to "Exploded View" Exploded View.
4.Remove water pipe and water hose. Refer to "Exploded View" Exploded View.
5.Remove engine undercover with power tool.
6.Remove exhaust front tube and three way catalysts (bank 1 and bank 2). Refer to "Exploded View" Exploded View.
7.Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.
Refer to "Exploded View" Exploded View.
8.Disconnect air fuel ratio sensor 1 (bank 1 and bank 2) harness connectors and remove harness clip.





9.Using the heated oxygen sensor wrench [SST: KV10114400 (J38365)] (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 that has been dropped onto a hard surface such as a concrete floor. Replace with a new sensor.
10.Remove exhaust manifold cover (upper) (bank 1 and bank 2).





11.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.
12.Remove gaskets.

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

INSTALLATION

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





- Install exhaust manifold gasket in direction shown in the figure.
(Follow the same procedure for both banks.)





- If stud bolts were removed, install them and tighten to the torque specified below.
Tightening torque: Refer to "Exploded View" Exploded View.





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





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

CAUTION:
- Before installing a new air fuel ratio sensor 1, 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 apply excessive torque to air fuel ratio sensor 1. Doing so may cause damage to air fuel ratio sensor 1, resulting in the "MIL" illuminating.
- Prevent rust preventives from adhering to the sensor body.