Removing and installing/replacing the catalytic converter (B36, B38) (Cooper)
Only perform this repair work after the exhaust system has cooled down.
Preliminary work needed:
- Disconnect BATTERY GROUND LEAD .
- Remove OXYGEN SENSOR .
- Remove MONITORING SENSOR .
- Remove front UNDERBODY PROTECTION .
- Remove EXHAUST SYSTEM .
- For all-wheel vehicles:
Remove PROP SHAFT
Removal:
If fitted: Remove differential pressure sensor for gasoline particulate filter
Carefully unlock the detents (1).
Feed out cover (2) and remove.
Unfasten plug connection (1) and disconnect.
Detach pressure hose (2).
Release screw (3).
Feed out and remove the differential pressure sensor (4).
Remove rubber mounts (1) from the catalytic converter.
Check rubber mount. Replaced damaged rubber mounts.
Parts: rubber mount
Release clamp (1). The clamp must be replaced every time it is removed.
Replace clamp and gasket.
Parts: clamp and seal.
Clean sealing surface.
Unscrew nuts (2).
Feed out catalytic converter (3) towards bottom and remove.
Installation:
Feed in catalytic converter (3) from below and install.
Make sure the seal and clamp between the catalytic converter and exhaust turbocharger are correctly seated.
Tighten clamp (1).
Tightening torque 18 30 1AZ .
Tighten down nuts (2).
Tightening torque 18 30 3AZ .
Connect rubber mount (1) to catalytic converter.
If fitted: Install the differential pressure sensor for gasoline particulate filter.
Feed in and install the differential pressure sensor (4).
Tighten screw (3).
Tightening torque 13 62 7AZ .
Replace pressure hose (2).
Parts: Pressure hose
Connect the pressure hose (2) with differential pressure sensor (4).
Connect connectors (1) and lock.
The connector (1) must engage audibly.
Feed in and install the cover (2).
Lock detents (1).
The detents (1) must audibly engage.
Required follow-up work:
- Install OXYGEN SENSOR .
- Install MONITORING SENSOR .
- For all-wheel vehicles:
Install PROP SHAFT
- Install EXHAUST SYSTEM .
- Install front UNDERBODY PROTECTION .
- Connect BATTERY GROUND LEAD .