Catalytic Converter

Description and Operation

Description

The gasoline engine catalytic converter is a three-way catalyst. It oxidizes carbon monoxide (CO) and hydrocarbons (HC), and separates oxygen from nitrogen oxides (NOx).

Catalytic Converter (CCo)

Repair Procedures

Removal

1. 1

   Remove the engine cover.

   (Refer to Engine Mechanical System - Engine Cover)

2. 2

   Disconnect the negative battery cable.

3. 3

   Remove the engine compartment under cover (front).

   (Refer to Engine Mechanical System - "Engine Room Cover")

4. 4

   Drain the engine coolant.

   (Refer to Engine Mechanical System - Engine Coolant)

5. 5

   Remove the air intake hose.

   (Refer to Engine Mechanical System - "Air Cleaner")

6. 6

   Disconnect the recirculation valve connector (A) and the vacuum hose (B).

   

7. 7

   Remove the intake hose and intercooler tube assembly (A).

   Tightening Torque

   Nuts (B):

   14,7–19.6 N·m

   Nut (C):

   14,7–19.6 N·m

   

8. 8

   Remove the turbocharger intake hose (A).

   Tightening torque:

   4.9–6.9 N·m (0.5–0.7 kgf·m, 3.6–5.1 ft-lbf, 43.4–60.8 in-lbf)

   

9. 9

   Remove the heat shield (A).

   Tightening torque: 7.8–11.8 N·m

   

10. 10

    Remove the heated oxygen sensor.

    (Refer to Engine Control/Fuel System - "Heated Oxygen Sensor (HO2S)").

11. 11

    Remove the heat shield (A) of the warm-up catalytic converter (WCC).

    Tightening torque: 18.6 – 24 N·m

    

12. 12

    Remove the front muffler.

    (Refer to Engine Mechanical System - Muffler)

13. 13

    Remove the bracket (A) of the warm-up catalytic converter (WCC).

    Tightening Torque

    Bolts (B):

    18,6–28 N·m

    Bolts (C):

    52,0–58 N·m

    

14. 14

    Remove the right hood seal cover (A).

    

15. 15

    Disconnect the heater hose (A).

    

16. 16

    Remove the warm-up catalytic converter (WCC) (A) and the gasket.

    Tightening Torque: 49.0–54 N·m

    

    

Installation

1. Install in the reverse order of removal.