THREE WAY CATALYTIC CONVERTER (TWC) REPLACEMENT [LF]
B3E011500000W04
- • 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. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [LF].)
2. Remove the front tunnel member. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [LF].)
- • 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)
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)
-
(1) Measure the indicated length from the cut surface of the presilencer and mark.
- (2) Apply heat-resistant sealant to the marked position along the complete perimeter.
- (3) Replace the gasket with a new one and install the new TWC to the WU-TWC.
-
(4) Insert the U-shaped bolt.
-
(5) Insert the TWC to the presilencer, and align the cut surface of the pipe with the marking.
7. Tighten the TWC installation nut. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [LF]. )
8. Tighten the U-shaped bolt between the presilencer and the new TWC using the following procedure. (Cut location A)
-
(1) Set the U-shaped bolt in the specified position.
-
(2) 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
B: Clearance between the U-shaped bolt and the tunnel member
- • 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.
- (3) Tighten the U-shaped bolt. Protrusion of U-shaped bolt after tightening