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EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.0]

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2016 – MX-5 – Engine

EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.0]

WARNING:

  • A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2. Remove in the order indicated in the table.

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

4. Install in the reverse order of removal.

Step 1

1

Main silencer

(See Flange Surface Installation Note.)

2

Seal ring

(See Seal Ring Removal Note.)

(See Seal Ring Installation Note.)

3

HO2S

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

4

Tunnel member

5

Member bracket (with member bracket)

6

TWC

(See Flange Surface Installation Note.)

Step 2

1

Exhaust manifold insulator

(See Exhaust Manifold Insulator Removal Note.)

(See Exhaust Manifold Insulator Installation Note.)

2

A/F sensor

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

3

Bracket

(See Bracket Installation Note.)

4

Exhaust manifold (WU-TWC)

(See Exhaust Manifold Removal Note.)

(See Exhaust Manifold Installation Note.)

5

Gasket

Exhaust System Insulator Removal/Installation

1. Remove the shift.

2. Remove the propeller shaft. (See PROPELLER SHAFT REMOVAL/INSTALLATION.)

3. Remove the power plant frame. (See POWER PLANT FRAME REMOVAL/INSTALLATION [SJ6A-EL].) (See POWER PLANT FRAME REMOVAL [M66M-D].) (See POWER PLANT FRAME INSTALLATION [M66M-D].)

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

5. Install in the reverse order of removal.

1

Insulator (rear)

(See Insulator (rear) removal note.)

2

Insulator (middle)

3

Insulator (front)

Insulator (rear) removal note

NOTE:

  • The insulator (rear) is installed using rivets.

1. Remove the rivets as shown in the figure.

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

b. Remove the flange using a drill ( 5 mm {0.2 in} drill bit).

Seal Ring Removal Note

1. Remove the seal ring using a flathead screwdriver being careful not to damage the pipe.

Exhaust Manifold Insulator Removal Note

CAUTION:

  • Since the quality of the material of exhaust manifold insulator is aluminum material, it is very easy to change. Therefore, it takes care that there is no modification of exhaust manifold insulator at the time of attachment for dealing with it.

Exhaust Manifold Removal Note

1. Remove the bolt shown in the figure and set the ground cable aside.

2. Remove the front suspension tower bar. (With front suspension tower bar) (See FRONT SUSPENSION TOWER BAR REMOVAL/INSTALLATION.)

3. Remove the front wheels and tires. (See GENERAL PROCEDURES (SUSPENSION).)

4. Remove the fasteners shown in the figure and slightly bend back the front mudguard No.2.

RH

LH

5. Remove the front splash shield No.1. (See FRONT SPLASH SHIELD No.1 REMOVAL/INSTALLATION.)

6. Remove the front crossmember under cover. (See FRONT CROSSMEMBER UNDER COVER REMOVAL/INSTALLATION.)

7. Remove the bolts shown in the figure.

RH

LH

8. Remove the nut shown in the figure.

9. Disconnect the hose clip shown in the figure.

10. Remove the bolts shown in the figure.

11. Install the SST to the position shown in the figure using the following bolt.

    Bolt:

  • part number 99794 1025 or an M10 × 1.25, length 25 mm {0.98 in}

    Tightening torque

  • 33???53 N·m {3.4???5.4 kgf·m, 25???39 ft·lbf}

12. Install the SST (49 E017 5A0) to the SST (49 UN30 3050) and engine hanger, then set them as shown in the figure.

NOTE:

  • Use 2 shafts as shown in the figure to lift up the engine on the left and right sides equally.

13. Rotate the shaft of the SST (49 E017 5A0) to support the engine.

14. Lift up the engine until the engine mount rubber is slightly raised above the front crossmember and verify again that the engine is securely hung.

15. Push the position shown in the figure and move the engine toward the left side of the vehicle.

NOTE:

  • The exhaust manifold can be removed by securing a space for removal. Therefore, the procedure is divided into one person moving the engine and one person removing the exhaust manifold.

16. Remove the exhaust manifold.

Exhaust Manifold Installation Note

1. Push the position shown in the figure and move the engine toward the left side of the vehicle.

NOTE:

  • The exhaust manifold can be installed by securing a space for installation. Therefore, the procedure is divided into one person moving the engine and one person installing the exhaust manifold.

2. Install the exhaust manifold.

3. Turn a shaft of SST (49 E017 5A0) and lower engine until engine mount rubber performs a sitting lightly in front crossmember.

4. Temporarily tighten the bolt as shown in the figure.

RH

LH

5. Turn a shaft of SST (49 E017 5A0) and lower engine more.

6. Tighten the bolt as shown in the figure.

RH

LH

    Tightening torque

  • 33???45 N·m {3.4???4.5 kgf·m, 25???33 ft·lbf}

7. Remove the SST (49 E017 5A0) and SST (49 UN30 3050).

8. Temporarily tighten the nut as shown in the figure.

9. Tighten the nut as shown in the figure.

    Tightening torque

  • 33???53 N·m {3.4???5.4 kgf·m, 25???39 ft·lbf}

10. Temporarily tighten the nut as shown in the figure.

11. Tighten the nut as shown in the figure.

    Tightening torque

  • 43???64 N·m {4.4???6.5 kgf·m, 32???47 ft·lbf}

12. Tighten the nut as shown in the figure.

    Tightening torque

  • 43???64 N·m {4.4???6.5 kgf·m, 32???47 ft·lbf}

13. Tighten the bolts shown in the figure.

14. Connect the hose clip shown in the figure.

15. Tighten the nut shown in the figure.

16. Install the front crossmember under cover. (See FRONT CROSSMEMBER UNDER COVER REMOVAL/INSTALLATION.)

17. Install the front splash shield No.1. (See FRONT SPLASH SHIELD No.1 REMOVAL/INSTALLATION.)

18. Install the front mudguard No.2. (See FRONT MUDGUARD REMOVAL/INSTALLATION.)

19. Install the front wheels and tires. (See GENERAL PROCEDURES (SUSPENSION).)

20. Install the front suspension tower bar. (With front suspension tower bar) (See FRONT SUSPENSION TOWER BAR REMOVAL/INSTALLATION.)

21. Install the ground cable shown in the figure.

Bracket Installation Note

1. Temporarily tighten the bolt as shown in the figure.

2. Tighten the bolt as shown in the figure.

    Tightening torque

  • 38???51 N·m {3.9???5.2 kgf·m, 29???37 ft·lbf}

Exhaust Manifold Insulator Installation Note

CAUTION:

  • Since the quality of the material of exhaust manifold insulator is aluminum material, it is very easy to change. Therefore, it takes care that there is no modification of exhaust manifold insulator at the time of attachment for dealing with it.

1. Install the exhaust manifold insulator.

2. Temporarily tighten the bolt as shown in the figure.

3. Tighten the bolt as shown in the figure.

    Tightening torque

  • 8???10 N·m {82???101 kgf·cm, 71???88 in·lbf}

4. Check that there is no contact with an exhaust manifold and exhaust manifold insulator.

Flange Surface Installation Note

CAUTION:

  • If the TWC or main silencer is reused, sand the flange surface and remove sanding residue, accumulated matter, and friction marks before installing the seal ring.

  • If this work is not performed, the seal ring may not be installed correctly. When sanding the flange surface, be careful not to damage the surface.

  • When sanding the flange surface, sanding residue may get into the removed part or pipe resulting in deterioration or damage to the part. When sanding, make sure parts are protected from sanding residue or foreign matter penetration.

1. Sand the surface shown in the figure using sandpaper and remove sanding residue, accumulated matter, and friction marks.

2. Degrease the sanded surface.

Seal Ring Installation Note

CAUTION:

  • If the TWC or main silencer is reused, sand the flange surface and remove sanding residue, accumulated matter, and friction marks before installing the seal ring. If this work is not performed, the seal ring may not be installed correctly.

  • If installation is performed without using the SST, the seal ring will be damaged and deformed, resulting in an incorrect installation. Always use the SST to install the seal ring.

1. Temporarily install the seal ring to the pipe so that the seal ring is even with the flange.

2. Install the SST to the seal ring so that the SST is even with the flange.

3. Press in the seal ring by tapping the SST using a plastic hammer until the seal ring contacts the flange.

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