Catalytic Converter: Service and Repair

THREE WAY CATALYTIC CONVERTER (TWC) REPLACEMENT [LF, L3]

California Emission Regulation Applicable Model

NOTE:
- The TWC is integrated with the presilencer and main silencer. Therefore, when replacing the TWC, cut between the TWC and presilencer.
Cut Location

1. Remove the rear tunnel member. Service and Repair

2. Remove the front tunnel member. Service and Repair

CAUTION:
- Be careful not to deform the pipe when cutting. If the pipe is deformed, the new pipe may not be installed correctly.

3. Cut the pipe between the TWC and presilencer using the following procedure. (Cut location A)
a. Measure the length from the hanger inner edge.

b. Cut the pipe at the specified location.

4. Remove the nut and TWC.

5. Remove burrs from the cut surface on the presilencer side using a round file.

6. Install the new TWC to the presilencer using the following procedure. (Cut location A)
a. Measure the indicated length from the cut surface of the presilencer to the marking.

b. Apply heat-resistant sealant to the marked position along the complete perimeter.
NOTE:
- The TWC installation nut should remain untightened.

c. Replace the gasket with a new one and install the new TWC to the WU-TWC.
NOTE:
- The U-shaped bolt can be inserted to the pipe on either side.

d. Insert the U-shaped bolt.

e. Insert the TWC to the presilencer, and align the cut surface of the pipe with the marking.

7. Tighten the TWC installation nut. Service and Repair

8. Tighten the U-shaped bolt between the presilencer and the new TWC using the following procedure. (Cut location A)
NOTE:
- The TWC has a marked line at the specified position where the U-shaped bolt is to be set.

a. Set the U-shaped bolt in the specified position.

b. Set the U-shaped bolt so that the clearance between the bolt and surrounding parts is as indicated in the figure.

CAUTION:
- Do not loosen U-shaped bolt after tightening. If it is loosened, the bolt cannot be tightened at the specified torque with the specified protrusion.
- Tighten the U-shaped bolt in three or four steps, left and right equally, to prevent clamp deformation.

c. Tighten the U-shaped bolt.

Protrusion of U-shaped bolt after tightening
- 17-19 mm {0.67-0.74 in}

Except for California Emission Regulation Applicable Model

NOTE:
- The TWC is integrated with the presilencer and main silencer. Therefore, when replacing the TWC, cut between the TWC and presilencer.
Cut Location

e. Insert the TWC to the presilencer, and align the cut surface of the pipe with the marking.

b. Set the U-shaped bolt so that the clearance between the bolt and surrounding parts is as indicated in the figure.

A: Clearance between the U-shaped bolt end and the vehicle side insulator
- 10 mm {0.40 in} or longer

B: Clearance between the U-shaped bolt and the tunnel member
- 20 mm {0.79 in} or longer

CAUTION:
- Do not loosen U-shaped bolt after tightening. If it is loosened, the bolt cannot be tightened at the specified torque with the specified protrusion.
- Tighten the U-shaped bolt in three or four steps, left and right equally, to prevent clamp deformation.

c. Tighten the U-shaped bolt.

Protrusion of U-shaped bolt after tightening
- 17-19 mm {0.67-0.74 in}