267619 Removing and installing primary catalytic converter
WM 267619 Removing and installing primary catalytic converter
Technical values
Preliminary work
1. Remove engine compartment cover above the oxygen sensor connectors. -> 700219 Removing and installing front cover (engine compartment)
2. Remove main catalytic converter. -> 267319 Removing and installing (main) catalytic converter 267319 Removing and installing (main) catalytic converter
3. Remove the cardan shaft on the right side (cylinder bank 1 to 4). -> 390219 Removing and installing front cardan shaft 390219 Removing and Installing Front Cardan Shaft
Preliminary work
Preliminary work for removing primary catalytic converter on cylinder bank 1-4
1. Remove wheel. -> 440519 Removing and installing wheel - section on "Removing" Removal and Replacement
2. Remove engine compartment cover above the oxygen sensor connectors. -> 700219 Removing and installing front cover (engine compartment) - section on "Removing"
3. Remove main catalytic converter. -> 267319 Removing and installing (main) catalytic converter 267319 Removing and installing (main) catalytic converter
Preliminary work for removing primary catalytic converter on cylinder bank 5-8
1. Remove engine compartment cover above the oxygen sensor connectors. -> 700219 Removing and installing front cover (engine compartment) - section on "Removing"
2. Remove main catalytic converter. -> 267319 Removing and installing (main) catalytic converter on 4.8-litre V8 DFI engines - section on "Removing" 267319 Removing and installing (main) catalytic converter
Removing primary catalytic converter
Removing primary catalytic converter on cylinder bank 1-4
CAUTION
Hot components
- Risk of burns
-> Let hot components cool down.
-> Wear personal protective gear.
Information
- Spray all fastening nuts on primary catalytic converter with penetrating oil and allow to work in.
Information
- To loosen and tighten fastening nuts on flange of turbocharger, several extensions and joints must be used.
- Good lighting and a mirror make removal and fitting easier at places very difficult to reach.
Holder for catalytic converter - turbo engine
1. Disconnect the oxygen sensor connectors for the oxygen sensors on the catalytic converter at the water splash panel (follow cable routing) and unclip the cables from the holders. => Oxygen sensor connectors (figure shows cylinders 1 to 4)
Oxygen sensor connectors (figure shows cylinders 1 to 4)
2. Route the oxygen sensor cables to the catalytic converter. -1-
Catalytic converter on turbo engine (figure shows cylinders 1 to 4)
3. Screw off side catalytic converter holder at the transmission -3-.
Catalytic converter on naturally aspirated engine (figure shows cylinders 5 to 8)
4. Carefully pull the oxygen sensor cable down.
5. Loosen the five fastening nuts for the turbocharger.
Turbocharger fastening nuts
6. Remove primary catalytic converter. To do this, carefully turn and pull the primary catalytic converter.
7. Remove and replace flange gaskets.
Removing primary catalytic converter on cylinder bank 5-8
CAUTION
Hot components
- Risk of burns
-> Let hot components cool down.
-> Wear personal protective gear.
Information
- Spray all fastening nuts on primary catalytic converter with penetrating oil and allow to work in.
Information
- To loosen and tighten fastening nuts on flange of turbocharger, several extensions and joints must be used.
- Good lighting and a mirror make removal and fitting easier at places very difficult to reach.
Holder for catalytic converter - turbo engine
1. Disconnect the oxygen sensor connectors for the oxygen sensors on the catalytic converter at the water splash panel (follow cable routing) and unclip the cables from the holders. => Oxygen sensor connectors (figure shows cylinders 1 to 4)
Oxygen sensor connectors (figure shows cylinders 1 to 4)
2. Route the oxygen sensor cables to the catalytic converter. -1-
Catalytic converter on turbo engine (figure shows cylinders 1 to 4)
3. Remove the heat protection shield on the steering gear connection. To do this, loosen the fastening screws. => Fastening screws securing heat shield to steering gear connection
Fastening screws securing heat shield to steering gear connection
4. Screw off side catalytic converter holder at the transmission -3-.
Catalytic converter on naturally aspirated engine (figure shows cylinders 5 to 8)
5. Loosen the five fastening nuts on the turbocharger.
Turbocharger fastening nuts
6. Remove primary catalytic converter. To do this, carefully turn and pull the primary catalytic converter. Move the steering if necessary and pull the primary catalytic converter past it.
7. Remove and replace flange gasket.
Installing primary catalytic converter
Installing primary catalytic converter on cylinder bank 1-4
Information
- To loosen and tighten fastening nuts on flange of turbocharger, several extensions and joints must be used.
- Good lighting and a mirror make removal and fitting easier at places very difficult to reach.
Holder for catalytic converter - turbo engine
1. Replace flange gasket and push over the studs.
2. Place primary catalytic converter on the studs of the turbocharger. To do this, carefully turn and push the primary catalytic converter into installation position.
Placing primary catalytic converter on the studs of the turbocharger
3. Fit side catalytic converter holders.
4. Position new self-locking nuts at the connection points of the catalytic converter and tighten to the specified tightening torque. => Tightening torque: 23 Nm (17 ftlb.)
5. Tighten side catalytic converter holders to the specified tightening torque => Tightening torque: 23 Nm (17 ftlb.). For details of transmission flange screws, see -> 373519 Removing and installing transmission 373519 Removing and Installing Transmission
WARNING
Cables not fitted or removed correctly
- Risk of burns
- Risk of short circuit or fire.
-> Check for correct fitting.
-> Replace damaged components.
6. Route oxygen sensor cables upwards so that the oxygen sensor cables are not touching the exhaust manifold or the exhaust system and clip them into position -1-. A useful aid here is a piece of wire with a hook.
Catalytic converter on turbo engine (figure shows cylinders 1 to 4)
7. Connect the oxygen sensor connectors for the oxygen sensors at the water splash panel and clip the cables into the holders. => Oxygen sensor connectors (figure shows cylinders 1 to 4)
Oxygen sensor connectors (figure shows cylinders 1 to 4)
Installing primary catalytic converter on cylinder bank 5-8
Information
- To loosen and tighten fastening nuts on flange of turbocharger, several extensions and joints must be used.
- Good lighting and a mirror make removal and fitting easier at places very difficult to reach.
Holder for catalytic converter - turbo engine
1. Replace flange gasket and push over the studs of the turbocharger.
2. Position the primary catalytic converter on the bolts on the turbocharger. To do this, carefully turn and pull the primary catalytic converter. Move the steering if necessary and move the primary catalytic converter into installation position.
Placing primary catalytic converter on the studs of the turbocharger
3. Fit side catalytic converter holders.
4. Position new self-locking nuts at the connection points of the catalytic converter and tighten to the specified tightening torque. => Tightening torque: 23 Nm (17 ftlb.)
5. Tighten side catalytic converter holders to the specified tightening torque => Tightening torque: 23 Nm (17 ftlb.). For details of transmission flange screws, see -> 373519 Removing and installing transmission 373519 Removing and Installing Transmission
6. Fit the heat shield on the steering gear connection. To do this, fit the fastening screws. => Tightening torque: 10 Nm (7.5 ftlb.)
Fastening screws securing heat shield to steering gear connection
WARNING
Cables not fitted or removed correctly
- Risk of burns
- Risk of short circuit or fire.
-> Check for correct fitting.
-> Replace damaged components.
7. Route oxygen sensor cables upwards so that the oxygen sensor cables are not touching the exhaust manifold or the exhaust system and clip them into position -1-. A useful aid here is a piece of wire with a hook.
Catalytic converter on turbo engine (figure shows cylinders 1 to 4)
8. Connect the oxygen sensor connectors for the oxygen sensors at the water splash panel and clip the cables into the holders. => Oxygen sensor connectors (figure shows cylinders 1 to 4)
Oxygen sensor connectors (figure shows cylinders 1 to 4)
Subsequent work
Subsequent work for installing primary catalytic converter on cylinder bank 1-4
1. Install main catalytic converter. -> 267319 Removing and installing (main) catalytic converter 267319 Removing and installing (main) catalytic converter
2. Fit engine compartment cover above the oxygen sensor connectors. -> 700219 Removing and installing front cover (engine compartment) - section on "Installing"
Subsequent work for installing primary catalytic converter on cylinder bank 5-8
1. Install main catalytic converter. -> 267319 Removing and installing (main) catalytic converter 267319 Removing and installing (main) catalytic converter
2. Fit engine compartment cover above the oxygen sensor connectors. -> 700219 Removing and installing front cover (engine compartment) - section on "Installing"