Removal And Installation (LH)

EXHAUST MANIFOLD AND THREE WAY CATALYST

Removal and Installation (LH)


REMOVAL


WARNING:
- Perform the work when the exhaust system has completely cooled down.
- When removing the front and rear engine mounting through bolts and nuts, lift the engine up slightly for safety.
NOTE:
When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.
1.Remove the air cleaner assembly, and air duct hose and resonator assembly. Refer to "Removal and Installation" Removal And Installation.
2.Remove the battery and battery tray assembly. Refer to "Removal and Installation (Battery Tray)" Service and Repair.
3.Remove the engine under cover. Refer to "Removal and Installation" Removal And Installation.
4.Remove the radiator assembly. Refer to"Removal and Installation" Removal And Installation.
5.Remove the engine cooling fan shroud and motor assembly. Refer to "Removal and Installation" Removal And Installation.
6.Remove the front exhaust tube. Refer to "Exploded View" Exploded View.
7.Remove the LH three way catalyst support brackets.
8.Remove heated oxygen sensor 2 (bank 2), air fuel ratio (A/F) sensor 1 (bank 2).
a.Remove harness connector of each sensor, and disconnect the harness from the bracket and middle clamp.
b.Remove both heated oxygen sensor 2 and air fuel ratio (A/F) sensor 1 using Tool.

Tool numbers : KV10114400 (J-38365)
: KV991J0050 (J-44626)

CAUTION:
- Be careful not to damage heated oxygen sensors 2 or air fuel ratio (A/F) sensors 1.
- Discard any heated oxygen sensor 2 which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; replace with a new sensor.
9.Remove exhaust manifold heat shield (LH) and three way catalyst heat shields (LH) using power tool.
10.Remove the three way catalyst (bank 2) by loosening the bolts first and then removing the nuts and through bolts.





11.Loosen and remove the exhaust manifold nuts in the reverse order as shown.

White arrow indicates : Engine front

NOTE:
Number 7 and 8 are not applicable to removal.

12.Remove the exhaust manifold (LH) and gasket.

INSPECTION AFTER REMOVAL

Surface Distortion





- Use a reliable straightedge and feeler gauge to check the flatness of the exhaust manifold mating surfaces.

Limit: 0.3 mm (0.012 in)

- Replace the exhaust manifold if the measurement exceeds specifications.

INSTALLATION

Installation is in the reverse order of removal.
1.Install the studs in the exhaust manifold (if removed), and tighten to specification.

Exhaust manifold studs: 15.4 Nm (1.6 kg-m, 11 ft-lb)





2.Install the exhaust manifold gasket in the direction shown.

CAUTION:
Do not reuse exhaust manifold gaskets.

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





3.Install the exhaust manifold (LH) nuts and tighten to specification in the order shown.

White arrow indicates : Engine front

NOTE:
Number 7 and 8 are tightened a second time.

CAUTION:
- Before installing a heated oxygen sensor 2 or air fuel ratio (A/F) sensor 1, clean the exhaust manifold threads using the oxygen sensor thread cleaner tool and apply anti-seize lubricant.

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

- Do not over-tighten the air fuel ratio (A/F) sensor 1 or heated oxygen sensors 2. Doing so may cause damage.

Tool numbers : KV10114400 (J-38365)
: KV991J0050 (J-44626)