Catalytic converter heat shield - r r
- Make
- Alfa Romeo
- Model
- GT Factory Service Manual
- Year
- 2003–2010
- Section
- Exhaust pipes and silencers › Catalytic converter heat shield - r r
CATALYTIC CONVERTER HEAT SHIELD - R R
Removing
Position the vehicle on a lift.
Make sure that the ignition key is in the OFF position, then disconnect the negative battery terminal.
| Description | Connector | |
|---|---|---|
| Battery | See A1B BATTERY ( BATTERY NEGATIVE ) |
Proceed with the removal
Op. 1016A40 IGNITION COIL COVER ON CYLINDER HEAD- R+R.
1. Disconnect the electrical connection for the right Lambda sensor and release it from the mounting bracket.
| Description | Connector | |
|---|---|---|
| 1 | Lambda sensor on pre-catalyzer - 2 | See K16 LAMBDA SENSOR ON PRE-CATALYZER -2 ( CONNECTORS ) |
1. Undo the bolt fixing the Lambda sensor electrical connections mounting bracket to the tappet cover.
2. Undo the two upper bolts fixing the heat shield for the catalytic converter.
Proceed with the removal
Op. 7055B54 UNDER-ENGINE GUARD - R R.
1. Undo and remove the right Lambda sensor.
2. Undo the four lower bolts fixing the heat shield for the catalytic converter.
1. Remove the catalytic converter heat shield.
1. Undo the nuts (1a) and remove the right heat shield for the catalytic converter (1b).
1. Undo the nuts (1a) and remove the left heat shield for the catalytic converter (1b).
Refitting
Place the left heat shield for the catalytic converter in its housing and fasten it using the nuts.
Place the right heat shield for the catalytic converter in its housing and fasten it using the nuts.
Place the heat shield for the catalytic converter in its housing and fasten it using the four lower nuts.
Position the right Lambda sensor in its housing and tighten it to the recommended torque.
| Fastening | Component | Ø | Value (daNm) | |
|---|---|---|---|---|
| RIGHT LAMBDA SENSOR | M18 | 4.0 ÷ 5.0 |
Proceed with the refitting
Op. 7055B54 UNDER-ENGINE GUARD - R R.
Tighten the two upper nuts fixing the heat shield for the catalytic converter.
Tighten the bolt fixing the Lambda sensor electrical connections mounting bracket to the tappet cover.
Connect the electrical connection for the right Lambda sensor and secure it to the mounting bracket.
Proceed with the refitting
Op. 1016A40 IGNITION COIL COVER ON CYLINDER HEAD- R+R.
Connect the negative battery terminal (-).
Remove the vehicle from the lift.
Removing
Position the vehicle on a lift.
Make sure that the ignition key is in the OFF position, then disconnect the negative battery terminal (-).
| Description | Connector | |
|---|---|---|
| Battery | See A1B BATTERY ( BATTERY NEGATIVE ) |
Proceed with the removal
Op. 7055B54 UNDER-ENGINE GUARD - R R.
1. Undo the nuts fixing the exhaust pipes between the catalytic preconverters and the catalytic converter, catalytic preconverter side.
Proceed with the removal
Op. 1080B96 LEFT REAR LAMBDA SENSOR ON CATALYTIC CONVERTER R R.
Proceed with the removal
Op. 1080B97 RIGHT REAR LAMBDA SENSOR ON CATALYTIC CONVERTER R R.
1. Undo the bolts fixing the catalytic converter assembly, intermediate silencer side.
2. Remove the catalytic converter assembly (2a) complete with pipes between the catalytic preconverters and the catalytic converter (2b) after having released it from the flexible mountings (2c).
Remove the seals.
1. Using a drill, remove the rivets (1a) and remove the heat shield for the catalytic converter (1b).
Refitting
Place the heat shield for the catalytic converter in its housing and fasten it using the rivets.
1. Place the catalytic converter assembly (1a) in position complete with the pipes between the catalytic preconverters and the catalytic converter (1b) and seals, then fasten it to the flexible mountings (1c).
2. Tighten the bolts fixing the catalytic converter assembly, intermediate silencer side to the recommended torque.
| Fastening | Component | Ø | Value (daNm) | |
|---|---|---|---|---|
| 2 | Bolt | CATALYTIC CONVERTER (ONE) | M8 | (Intermediate silencer side) 2.3 - 2.8 |
Proceed with the refitting
Op. 1080B96 LEFT REAR LAMBDA SENSOR ON CATALYTIC CONVERTER R R.
Proceed with the refitting
Op. 1080B97 RIGHT REAR LAMBDA SENSOR ON CATALYTIC CONVERTER R R.
1. Tighten the nuts fixing the exhaust pipes between the catalytic preconverters and the catalytic converter, catalytic preconverter side to the recommended torque.
| Fastening | Component | Ø | Value (daNm) | |
|---|---|---|---|---|
| 1 | Nut | PIPE RIGHT CONVERTER/PRECONVERTER | M8 | (Catalytic preconverter side) 2.3 - 2.8 |
Proceed with the refitting
Op. 7055B54 UNDER-ENGINE GUARD - R R.
Connect the negative battery terminal (-).
Remove the vehicle from the lift.
Removing
Position the vehicle on a lift.
Proceed with the removal
Op. 1080B62 CATALYTIC CONVERTER - R + R.
1. Remove the rivets fixing the heat shield using a drill.
2. Remove the catalytic converter heat shield.
Refitting
Place the heat shield for the catalytic converter in its housing and fasten it using new rivets.
Proceed with the refitting
Op. 1080B62 CATALYTIC CONVERTER - R + R.
Remove the vehicle from the lift.
Removing
Position the vehicle on a lift.
Make sure that the ignition key is in the OFF position, then disconnect the negative battery terminal.
| Description | Connector | |
|---|---|---|
| Battery | Vedere A1B BATTERIA ( CABLAGGI ) |
1. Disconnect the electrical connection for the Lambda sensor.
| Description | Connector | |
|---|---|---|
| 1 | Lambda sensor downstream of the post-converter | Vedere K17 SONDA LAMBDA A VALLE DEL POST-CATALIZZATORE ( MOTORE ) |
1. Release the electrical wiring for the Lambda sensor from the fastenings on the underbody.
1. Loosen the collar fastening the intermediate silencer to the rear silencer.
2. Release the intermdiate silencer (2a) from the flexible mounting (2b).
1. Undo the bolt fixing the front flexible mounting bracket for the intermediate exhaust silencer.
1. Undo the nuts fixing the catalytic converter to the catalytic preconverter.
1. Undo the bolts fixing the catalytic converter flexible mounting brackets.
1. Remove the catalytic converter assembly (1a) and the intermediate silencer (1b).
Remove the seals.
2. Using a drill, remove the rivets and remove the heat shield for the catalytic converter.
Refitting
Place the heat shield for the catalytic converter in its housing and fasten it using suitable rivets.
Place the catalytic converter complete with intermediate silencer and seal in position.
Tighten the bolts fixing the catalytic converter flexible mounting brackets.
1. Tighten the nuts fixing the catalytic converter to the catalytic preconverter to the recommended torque.
| Fastening | Component | Ø | Value (daNm) | |
|---|---|---|---|---|
| 1 | Nut | CATALYTIC CONVERTER (ONE) | M8 | (Catalytic preconverter side) 2.7 - 3.3 |
Tighten the bolt fixing the front flexible mounting bracket for the intermediate exhaust silencer.
Fasten the intermediate silencer to the flexible mounting.
Tighten the collar fastening the intermediate silencer to the rear silencer.
Fasten the electrical wiring for the Lambda sensor to the fastenings on the underbody.
Connect the electrical connection for the Lambda sensor.
Connect the negative battery terminal (-).
Remove the vehicle from the lift.
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