Mazda 3 manuals

Mazda 3 Service Manual: Exhaust System Removal/Installation [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Exhaust & Emissions / Exhaust System Removal/Installation [Mzr 2.0, Mzr 2.5]

WARNING:

1. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Remove the plug hole plate..

4. Remove in the order indicated in the table.

5. Remove the insulator..

6. Install in the reverse order of removal.

MZR 2.0



1

Main silencer

2

Tunnel member (rear)

3

TWC

4

HO2S

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)

5

A/F sensor

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)

6

Exhaust manifold insulator

(See Exhaust Manifold Installation Note.)

7

insulator

8

Exhaust manifold bracket

9

Exhaust manifold

(See Exhaust Manifold Removal Note.)

10

Exhaust manifold gasket


MZR 2.5 (Except for Mexico)


MZR 2.5 (Mexico)



1

Main silencer

2

Tunnel member (rear)

3

TWC

4

HO2S

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)

5

A/F sensor

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].)

6

insulator

7

Exhaust manifold insulator

(See Exhaust Manifold Installation Note.)

8

Exhaust manifold bracket

9

Exhaust manifold

(See Exhaust Manifold Removal Note.)

10

Exhaust manifold gasket


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.



1

Insulator (rear No.1)

(See Insulator (Rear No.1, No.2, No.3) Removal Note.)

2

Insulator (rear No.2)

(See Insulator (Rear No.1, No.2, No.3) Removal Note.)

3

Insulator (rear No.3)

(See Insulator (Rear No.1, No.2, No.3) Removal Note.)

4

Insulator (middle No.1)

5

Insulator (middle No.2)

6

Insulator (front)

(See Insulator (Front) Removal Note.)


Insulator (Rear No.1, No.2, No.3) Removal Note

NOTE:

1. Push out the mandrel using a hammer and punch (22.8 mm {0.080.11 in} diameter).


2. Remove the flange using a drill (5 mm {0.20 in} drill bit).


Insulator (Front) Removal Note

1. Remove the tunnel member (front).

2. Remove the insulator (front).

Exhaust Manifold Removal Note

1. Windshield wiper arm and blade..

2. Remove the cowl grille..

3. Remove the windshield wiper motor..

4. Remove the cowl panel..

5. Remove the exhaust manifold.

Exhaust Manifold Installation Note

1. Temporarily tighten the exhaust manifold installation nuts.

2. Tighten the exhaust manifold new installation nuts in the order shown in the figure.


Exhaust Manifold Insulator Installation Note

1. Temporarily tighten the exhaust manifold insulator.

2. Tighten the exhaust manifold insulator in the order shown in the figure.

MZR 2.0


MZR 2.5


Exhaust System Inspection [Mzr 2.0, Mzr 2.5]
1. Start the engine and inspect each exhaust system component for exhaust gas leakage. If there is leakage, repair or replace the appropriate component.. ...

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