Install

9. Release the two wiring harnesses for the HEGO sensor from the clip on the heat shield.

CAUTION
Turn the electrical harness for the HEGO sensor when you remove the sensor in the step that follows. If you do not, the harness can be damaged.

10. Release the HEGO sensor from the catalytic converter.
11. Install an applicable length of string to the wiring harness and the electrical connector for the HEGO sensor.
12. Use the string to put the wiring harness for the HEGO sensor behind the heat shield.
13. Release the string from the electrical connector for the HEGO sensor.
14. Remove the HEGO sensor.
15. Clean the component mating faces.

Install

1. Put the HEGO sensor into position.
2. Attach an applicable length of string to the wiring harness for the HEGO sensor.
3. Use the string to put the wiring harness for the HEGO sensor behind the heat shield.
4. Remove and discard the string.

CAUTION
Turn the electrical harness for the HEGO sensor when you remove the sensor in the step that follows. If you do not, the harness can be damaged.

5. Install the HEGO sensor into the catalytic converter.
6. Tighten the HEGO sensor.
7. Put the heat shield into position.
8. Install and tighten the two bolts that attach the heat shield to the torque tube.
9. Install the two wiring harnesses for the HEGO sensor into the clip on the heat shield.
10. Put the bracket into position.
11. Install and tighten the two bolts that attach the bracket to the engine.
12. Connect the two electrical connectors to the HEGO sensor.
13. Install the two electrical connectors for the HEGO sensor into the bracket.

Silencer and Bypass Valve Assembly-Remove for Access/Refit-Coupe Only

Removal

1. Raise vehicle on ramp.
2. Remove rear undertray (refer to Workshop Manual procedure 01.02.PB Undertray - Rear - Renew).
3. Remove Allen bolts (x4), bumper diffuser to mounting brackets. Remove diffuser, collect securing brackets.
4. Disconnect both by-pass valve vacuum lines.

THE EXHAUST SYSTEM WILL BE VERY HOT AFTER OPERATION. LET THE EXHAUST COOL BEFORE YOU DO WORK. IF YOU DO NOT, PESONAL INJURY CAN OCCUR.

5. Remove bolts (x4), rear exhaust pipes to silencer. Collect springs from bolts.
6. Remove bolts (x4), securing LH and RH silencer rear hanger brackets to body.
7. Remove bolts (x4), silencer front mountings to subframe.

GET THE AID OF ONE MORE PERSON WHEN YOU REMOVE THE REAR EXHAUST SILENCER. THE SILENCER IS HEAVY.

8. Position suitable lifter to support weight of silencer. With assistance, remove silencer.
9. Remove both rear rubber mountings and hanger brackets from silencer.

Installation

1. Clean muffler and mating faces on rear pipes.

GET THE AID OF ONE MORE PERSON WHEN YOU INSTALL THE REAR EXHAUST SILENCER. THE SILENCER IS HEAVY.

2. Position silencer on lifter. Install silencer, position rear hangers, install and torque tighten bolts (x4).
3. Position front mountings to subframe, install and torque tighten bolts (x4).
4. Align silencer to rear pipes, install springs (x4), install and torque tighten bolts (x4).

Ensure correct alignment of exhaust pipes and silencer before tightening of fixing clamps.

5. Check silencer to rear pipes for correct alignment and clearances.
6. Connect lines to both by-pass vacuum valves.
7. Position mounting brackets, install rear bumper diffuser. Install and tighten Allen bolts.
8. Install rear undertray (refer to Workshop Manual procedure 01.02.PB Undertray - Rear - Renew).
9. Lower vehicle on ramp.

Silencer and Bypass Valve Assembly-Remove for Access/Refit-Roadster Only

Removal

1. Raise vehicle on ramp.