EXHAUST SYSTEM REMOVAL/INSTALLATION [MZI-3.7]

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Warning
•  When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait until they are cool before removing the exhaust system.
Caution
•  In installing WU-TWC, WU-TWC protector, WU-TWC hanger bracket and WU-TWC bracket, improper fastening or seating can happen. In order to avoid faulty installation, always refer to “Warm Up Three Way Catalytic Converter (WU-TWC) Installation Note” during the work. (See Warm Up Three Way Catalytic Converter (WU-TWC) (LH) Installation Note.)(See Warm Up Three Way Catalytic Converter (WU-TWC) (RH) Installation Note.)

1.  Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].)

2.  Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.7].)

3.  Remove in the order indicated in the table.

4.  Remove the exhaust system insulator. (See Exhaust System Insulator Removal/Installation Note.)

5.  Install in the reverse order of removal.

Step 1

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1
Main silencer (RH)
2
Main silencer (LH)
3
Presilencer
4
Middle pipe
5
Front pipe

Step 2

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1
WU-TWC bracket (LH)
2
WU-TWC (LH)
(See Warm Up Three Way Catalytic Converter (WU-TWC) (LH) Installation Note.)
3
•  Rear HO2S (LH) (PCM connector (2 types))
•  HO2S (LH) (PCM connector (3 types))
4
WU-TWC protector No.1 (LH)
5
WU-TWC protector No.2 (LH)
6
WU-TWC hanger bracket No.1 (LH)
7
WU-TWC hanger bracket No.2 (LH)
8
WU-TWC bracket (RH)
9
WU-TWC (RH)
(See Warm Up Three Way Catalytic Converter (WU-TWC) (RH) Removal Note.)
(See Warm Up Three Way Catalytic Converter (WU-TWC) (RH) Installation Note.)
10
•  Rear HO2S (RH) (PCM connector (2 types))
•  HO2S (RH) (PCM connector (3 types))
11
WU-TWC protector No.1 (RH)
12
WU-TWC protector No.2 (RH)
13
WU-TWC hanger bracket No.1 (RH)
14
WU-TWC hanger bracket No.2 (RH)
15
Exhaust manifold insulator (LH)
(See Exhaust Manifold Insulator (LH) Removal Note.)
16
Exhaust manifold (LH)
(See Exhaust Manifold (LH) Installation Note.)
17
•  Front HO2S (LH) (PCM connector (2 types))
•  A/F sensor (LH) (PCM connector (3 types))
18
Stud
19
•  Front HO2S (RH) (PCM connector (2 types))
•  A/F sensor (RH) (PCM connector (3 types))
20
Exhaust manifold insulator (RH)
21
Exhaust manifold (RH)
(See Exhaust Manifold (RH) Installation Note.)
22
Stud


Exhaust System Insulator Removal/Installation Note

1.  Remove the exhaust system insulator in the order shown in the figure.

2.  Install in the reverse order of removal.

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1
Main silencer insulator (RH)
2
Main silencer insulator (LH)
3
Presilencer insulator
4
Middle pipe insulator


Warm Up Three Way Catalytic Converter (WU-TWC) (RH) Removal Note


2WD

1.  Remove the joint shaft. (See JOINT SHAFT REMOVAL/INSTALLATION [2WD].)

2.  Remove the WU-TWC (RH).


4WD

1.  Remove the joint shaft. (See JOINT SHAFT REMOVAL/INSTALLATION [4WD].)

2.  Remove the insulator. (See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION [L.H.D.].)(See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION [R.H.D.].)

3.  Remove the No.1 engine mount (transaxle side). (See ENGINE REMOVAL/INSTALLATION [MZI-3.7].)

4.  Push up the engine.

5.  Remove the WU-TWC (RH).


Exhaust Manifold Insulator (LH) Removal Note

1.  Set the fan control module out of the way. (See COOLING FAN COMPONENT REMOVAL/INSTALLATION [MZI-3.7].)

2.  Remove the exhaust manifold Insulator (LH).


Exhaust Manifold (RH) Installation Note

1.  Tighten the exhaust manifold (RH) installation nuts in the order shown in the figure.

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Tightening torque
22—28 N·m {2.3—2.8 kgf·m, 17—20 ft·lbf}


Exhaust Manifold (LH) Installation Note

1.  Tighten the exhaust manifold (RH) installation nuts in the order shown in the figure.

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Tightening torque
22—28 N·m {2.3—2.8 kgf·m, 17—20 ft·lbf}


Warm Up Three Way Catalytic Converter (WU-TWC) (RH) Installation Note

Caution
•  Be sure to follow the procedure below in installing the components. Otherwise improper fastening or seating may occur.

1.  Tighten nut of D with tightening torque.

Tightening torque
17—23 N·m {1.8—2.3 kgf·m, 13—16 ft·lbf}

2.  Temporarily tighten bolt of E.

3.  Temporarily tighten nut of F.

4.  Temporarily tighten bolt of G.

5.  Tighten nut of F with tightening torque.

Tightening torque
34—46 N·m {3.5—4.6 kgf·m, 26—33 ft·lbf}

6.  Tighten bolt of G with tightening torque.

Tightening torque
17—23 N·m {1.8—2.3 kgf·m, 13—16 ft·lbf}

7.  Tighten bolt of E with tightening torque.

Tightening torque
17—23 N·m {1.8—2.3 kgf·m, 13—16 ft·lbf}


Warm Up Three Way Catalytic Converter (WU-TWC) (LH) Installation Note

Caution
•  Be sure to follow the procedure below in installing the components. Otherwise improper fastening or seating may occur.

1.  Temporarily tighten bolt of A.

2.  Temporarily tighten nut of B.

3.  Temporarily tighten bolt of C.

4.  Tighten nut of B with tightening torque.

Tightening torque
34—46 N·m {3.5—4.6 kgf·m, 26—33 ft·lbf}

5.  Tighten bolt of C with tightening torque.

Tightening torque
17—23 N·m {1.8—2.3 kgf·m, 13—16 ft·lbf}

6.  Tighten bolt of A with tightening torque.

Tightening torque
17—23 N·m {1.8—2.3 kgf·m, 13—16 ft·lbf}