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. Draining.
2. Remove engine cover with power tool. Exploded View.
3. Remove air cleaner case and air duct (RH and LH). Exploded View.
4. Remove water pipe and water hose. Exploded View.
5. Remove engine undercover with power tool.
6. Remove exhaust front tube and three way catalysts (bank 1 and bank 2). Exploded View.
7. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft. 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 (J-38365)] (C), remove air fuel ratio sensor 1 (bank 1 and bank 2).

A : Bank 1
B : 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.

A : Bank 1
B : Bank 2
White arrow: Engine front

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.

EXHAUST MANIFOLD GASKET





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

A : Bank 1
B : Triangle press
C : Bank 2
White arrow: Engine front

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

Tightening torque : Refer to EM-34, "Exploded View". Exploded View





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

A : Bank 1
B : Bank 2
White arrow: Engine front

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.