M35x AWD V6-3.5L (VQ35HR) (2010)
Catalytic Converter: Service and Repair
Removal and Installation
EXHAUST MANIFOLD AND THREE WAY CATALYST
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 3, 10 and 11 are unnecessary.
1. Remove engine room cover (RH and LH). See: Engine/Access Cover/Service and Repair/Component.
2. Remove engine cover with power tool. See: Engine/Intake Manifold/Service and Repair/Intake Manifold Collector/Component See:
Engine/Intake Manifold/Service and Repair/Intake Manifold Collector/Removal and Installation.
3. Drain engine coolant. See: Cooling System/Coolant/Service and Repair/Inspection.
CAUTION:
-
Perform this step when engine is cold.
-
Never spill engine coolant on drive belt.
4. Remove air cleaner case and air duct. See: Engine/Tune-up and Engine Performance Checks/Air Cleaner Housing/Air Filter Element/Service and
Repair/Component See: Engine/Tune-up and Engine Performance Checks/Air Cleaner Housing/Air Filter Element/Service and Repair/Removal
and Installation.
5. Remove front and rear undercover with power tool.
6. Disconnect heated oxygen sensor harness connectors.
CAUTION:
-
Be careful not to damage heated oxygen sensor 2.
-
Discard any heated oxygen sensor 2 which has been dropped onto a hard surface such as a concrete floor. Replace with a new sensor.
7. Remove exhaust mounting bracket between three way catalysts (bank 1 and bank 2) and transmission. See: Service and Repair/Component.
8. Remove exhaust front tube and three way catalysts (bank 1 and bank 2).
9. Disconnect harness connector and remove air fuel ratio sensor
1 on both banks using heated oxygen sensor wrench [SST:
KV10114400 (J38365)] (C).
A: Bank 1
B: Bank 2
-
Put marks to identify installation positions of each air fuel ratio sensor 1.
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.
10. Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft. See: Steering and
Suspension/Steering/Steering Column/Service and Repair.
11. Remove water bypass pipe and heater pipe. See: Cooling System/Coolant Outlet/Service and Repair/Component.
12. Remove exhaust manifold cover.