EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2]


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Warning
•  When the engine and exhaust system are hot, they can cause severe burns or injury. Turn off the engine and wait until they are cool before removing the exhaust system.
Caution
•  Perform exhaust gas temperature sensor removal/installation only when inspection or replacement is required, such as when DTCs for the sensor are displayed, because it may cause exhaust gas leaks. If removal or installation/removal is performed, always verify that there is no exhaust gas leak after reinstallation.
Note
•  If the diesel particulate filter indicator light is flashing and/or the MIL is illuminated, perform the symptom troubleshooting and verify the DTC of the diesel particulate filter system by using the M-MDS before removing parts. If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection. (See DTC TABLE [MZR-CD 2.2].) (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].)
•  If the diesel particulate filter indicator light is illuminated, inspect the symptom troubleshooting procedure of the diesel particulate filter system before removing parts. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].)
•  If the oxidation catalytic converter (built-in diesel particulate filter) is replaced, always perform each adjustment procedure using the following steps.

STEP

ACTION

PAGE/CONDITION

1
Replace the oxidation catalytic converter.
2
Switch the ignition to on.
3
Perform diesel particulate filter data reset procedure.
4
Start the engine.
Verify that the MIL does not illuminate.
5
Switch the ignition to off.
6
Switch the ignition to on (Engine off).
7
Perform KOEO self-test procedure.
8
Perform exhaust gas pressure sensor data reset procedure.
9
Switch the ignition to off.
10
Wait for 20 s.
11
Start the engine.
12
Perform KOER self-test procedure.
Warm up until the exhaust gas temperature (EXHTEMP1, EXHTEMP2 PID) is 100 °C {212 °F} or more.
13
Perform fuel injector injection amount correction procedure.
Engine coolant temperature 65—95 °C {149—203 °F}.
Intake air temperature 15—65 °C {59—149 °F}.
Fuel temperature 30—60 °C {86—140 °F}.
14
Perform diesel particulate filter assessment procedure.
Engine coolant temperature 60 °C {140 °F} or more.
15
Perform diesel particulate filter regeneration procedure.
Engine coolant temperature 70 °C {158 °F} or more.
16
Using the following PIDs, verify that the diesel particulate filter regeneration has been completed.
―  REG_REQ_A
―  REG_REQ_F
17
Perform after repair procedure.
18
Switch the ignition to off.

1.  Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.  Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZR-CD 2.2].)

3.  Remove the aerodynamic under cover No.2. (See AERODYNAMIC UNDER COVER NO.2 REMOVAL/INSTALLATION.)

4.  Remove in the order indicated in the table.

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

6.  Install in the reverse order of removal.

7.  Start the engine and:

(1)  Inspect the exhaust gas leakage.
(2)  If any servicing around the turbocharger is performed, inspect around the turbocharger for oil or engine coolant leakage.

Step 1

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1
Member
2
Presilencer
3
A/F sensor
4
Exhaust gas temperature sensor
5
Exhaust gas pressure hose
6
Oxidation catalytic converter (built-in diesel particulate filter)
7
Insulator
8
Exhaust manifold insulator (lower)
9
Front pipe bracket No.1
10
Front pipe bracket No.2
11
Front pipe

Step 2

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1
Front pipe gasket
2
Exhaust manifold insulator (upper)
3
Oil inlet pipe
4
Oil outlet pipe
5
Water hose
6
Turbocharger
7
Water pipe
8
Exhaust manifold
9
Exhaust manifold gasket


Exhaust System Insulator Removal/Installation Note

1.  Remove in the order indicated in the table.

2.  Install in the reverse order of removal.

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1
Insulator (rear No.1)
2
Insulator (rear No.2)
3
Insulator (middle No.1)
4
Insulator (middle No.2)
5
Insulator (front)


Insulator (rear No.1, No.2) removal note

Note
•  The insulator rear is installed using rivets.
•  When reinstalling the rivet, install the same rivet or M5 bolt and nut.

1.  Push out the mandrel using a hammer and punch (2—2.8 mm {0.08—0.11 in} diameter).

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

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Presilencer Removal Note

1.  To remove the rear crossmember, remove the following parts:

1.  Rear auto leveling sensor (Vehicles with AFS) (See AUTO LEVELING SENSOR REMOVAL/INSTALLATION.)
2.  Rear stabilizer (See REAR STABILIZER REMOVAL/INSTALLATION.)
3.  Rear coil spring (See REAR COIL SPRING REMOVAL/INSTALLATION.)
4.  Rear lower arm (See REAR LOWER ARM REMOVAL/INSTALLATION.)
5.  Rear crossmember. (See REAR CROSSMEMBER REMOVAL/INSTALLATION.)

2.  Remove the presilencer.


Insulator Removal Note

1.  Remove the air inlet pipe No.1. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.  Remove the turbocharger air outlet pipe No.2. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

3.  Remove the Turbocharger air inlet pipe bracket. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

4.  Remove the turbocharger air inlet pipe. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

5.  Remove the turbocharger air outlet pipe No.1. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

6.  Remove the insulator.


Water Hose Removal Note

1.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZR-CD 2.2].)

2.  Disconnect the water hose.


Turbocharger Removal Note

1.  Disconnect the variable boost control (VBC) actuator connector.

2.  Disconnect the vacuum hose from the VBC actuator.

3.  Remove the turbocharger and water pipe as a single unit.

4.  Remove the turbocharger.


Exhaust Manifold Removal Note

1.  Remove the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].)

2.  Remove the EGR cooler and EGR cooler bypass valve component. (See EGR COOLER REMOVAL/INSTALLATION [MZR-CD 2.2].)

3.  Remove the exhaust manifold.


Exhaust Manifold Installation Note

1.  Tighten the exhaust manifold installation nuts in the order shown.

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Front Pipe Gasket Installation Note

1.  To come to position that the claw of the gasket shows in figure, it installs it.

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